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Afolabi HA, Salleh SM, Zakaria Z, Seng CE, Nafi NM, Bin AbdulAziz AA, Wada Y, Irekeola AA, Al-Ml-hanna SB, Mussa A. Targeted variant prevalence of FBXW7 gene mutation in colorectal carcinoma propagation. The first systematic review and meta-analysis. Heliyon 2024; 10:e31471. [PMID: 38845996 PMCID: PMC11154211 DOI: 10.1016/j.heliyon.2024.e31471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 05/15/2024] [Accepted: 05/16/2024] [Indexed: 06/09/2024] Open
Abstract
FBXW7 is a tumour suppressor gene that functions as E3-ubiquitin-ligase, targeting numerous oncoproteins for degradation, i.e., Cyclin-E, c-Myc, and Notch. FBXW7 performs a pivotal role in regulating cell cycle progression. FBXW7 mutation is frequently implicated in various cancers. Methodology A systematic review and meta-analysis done on several studies using "Preferred Reporting Items for Systemmatic Reviews and Meta-Analysis (PRISMA)" criteria and registered with PROSPERO (registration-number-CRD42023388845). The preliminary search comprises 1182 articles; however, 58 studies were subsequently chosen after eliminating non-eligible studies. To explore the prevalence of FBXW7 mutation among colorectal cancer patients, data were analysed using "OpenMeta Analyst and comprehensive meta-analysis-3.0 (CMA-3.0)" software. Results This meta-analysis involves 13,974 respondents; most were males 7825/13,974, (56.0 %). Overall prevalence of FBXW7 mutations was 10.3 %, (95%CI: 8.6-12.4), I2 = 90.5 %, (P < 0.001). The occurrence of FBXW7 mutations was highest in Russia [19.0 %, (95%CI: 9.8-33.7)] and Taiwan [18.8 %, (95%CI: 8.7-35.9)], P-values< 0.05 while the least prevalence was reported in Netherland (4 %) and Italy (5 %), both P-values< 0.001. Overall prevalence of FBXW7 abberation was greatest amongst male gender: "53.9 %, (95%CI: 8.3-62.0 %)", Tumour location (colon): 59.8 %, (95%CI: 53.9-65), tumour site (left): 61.6 %, (95%CI: 53.8-68.9), Tumour-grade (Moderate): 65.9 %, (95%CI: 54.9-75.4 %), and Tumour late-stage: 67.9 %, (95%CI: 49.7-84.3 %), all P-values< 0.001. When stratified according to study-period, an increasing trend was noted from 2018 till present with the highest mutation rate recorded in 2022 (15.3 %). Conclusion Overall prevalence of FBXW7 mutations was 10.3 % with male gender, left side, and late-stage being most mutated, and these outcomes conform with severally published articles on FBXW7 mutation.
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Affiliation(s)
- Hafeez Abiola Afolabi
- Department of General Surgery, School of Medical Sciences, Hospital Universiti Sains Malaysia (HUSM), Health Campus, Universiti Sains Malaysia (USM), Kubang Kerian, Kelantan, 16150, Malaysia
| | - Salzihan Md Salleh
- Department of Pathology, School of Medical Sciences, Hospital Universiti Sains Malaysia (HUSM), Health Campus, Universiti Sains Malaysia (USM), Kubang Kerian, 16150, Kelantan, Malaysia
| | - Zaidi Zakaria
- Department of General Surgery, School of Medical Sciences, Hospital Universiti Sains Malaysia (HUSM), Health Campus, Universiti Sains Malaysia (USM), Kubang Kerian, Kelantan, 16150, Malaysia
| | - Ch'ng Ewe Seng
- Department of Pathology, Advanced Medical & Dental Institute, Universiti Sains Malaysia (USM), Kepala Batas, 13200, Malaysia
| | - Norasikin Mohd Nafi
- Department of Pathology, School of Medical Sciences, Universiti Sains Malaysia (USM), Health Campus, Kubang Kerian, 16150, Malaysia
| | - Ahmad Aizat Bin AbdulAziz
- Department of Human Genome Centre, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian, 16150, Kelantan, Malaysia
| | - Yusuf Wada
- Department of Medical Microbiology and Parasitology, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian, 16150, Kelantan, Malaysia
- Department of Zoology, Ahmadu Bello University, Zaria, Kaduna, Nigeria
| | - Ahmad Adebayo Irekeola
- Department of Medical Microbiology and Parasitology, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian, 16150, Kelantan, Malaysia
| | - Sameer Badri Al-Ml-hanna
- Department of Exercise Physiology, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian, 16150, Kelantan, Malaysia
| | - Ali Mussa
- Department of Biology, Faculty of Education, Omdurman Islamic University, Omdurman, P.O. Box 382, Sudan
- Department of Haematology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, 16150, Kelantan, Malaysia
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Nummela P, Zafar S, Veikkolainen E, Ukkola I, Cinella V, Ayo A, Asghar MY, Välimäki N, Törnquist K, Karhu A, Laakkonen P, Aaltonen LA, Ristimäki A. GNAS mutation inhibits growth and induces phosphodiesterase 4D expression in colorectal cancer cell lines. Int J Cancer 2024; 154:1987-1998. [PMID: 38319157 DOI: 10.1002/ijc.34865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 12/31/2023] [Accepted: 01/10/2024] [Indexed: 02/07/2024]
Abstract
Approximately 5% of colorectal cancers (CRCs) have a gain-of-function mutation in the GNAS gene, which leads to the activation of cAMP-dependent signaling pathways and associates with poor prognosis. We investigated the effect of an activating GNAS mutation in CRC cell lines on gene expression and cell proliferation in vitro, and tumor growth in vivo. GNAS-mutated (GNASmt) HCT116 cells showed stimulated synthesis of cAMP as compared to parental (Par) cells. The most upregulated gene in the GNASmt cells was cAMP-hydrolyzing phosphodiesterase 4D (PDE4D) as detected by RNA sequencing. To further validate our finding, we analyzed PDE4D expression in a set of human CRC tumors (n = 35) and demonstrated overexpression in GNAS mutant CRC tumors as compared to GNAS wild-type tumors. The GNASmt HCT116 cells proliferated more slowly than the Par cells. PDE4 inhibitor Ro 20-1724 and PDE4D subtype selective inhibitor GEBR-7b further suppressed the proliferation of GNASmt cells without an effect on Par cells. The growth inhibitory effect of these inhibitors was also seen in the intrinsically GNAS-mutated SK-CO-1 CRC cell line having high levels of cAMP synthesis and PDE4D expression. In vivo, GNASmt HCT116 cells formed smaller tumors than the Par cells in nude mice. In conclusion, our findings demonstrate that GNAS mutation results in the growth suppression of CRC cells. Moreover, the GNAS mutation-induced overexpression of PDE4D provides a potential avenue to impede the proliferation of CRC cells through the use of PDE4 inhibitors.
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Affiliation(s)
- Pirjo Nummela
- Applied Tumor Genomics Research Program, Research Programs Unit, University of Helsinki, Helsinki, Finland
- Department of Pathology, HUSLAB, HUS Diagnostic Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Sadia Zafar
- Applied Tumor Genomics Research Program, Research Programs Unit, University of Helsinki, Helsinki, Finland
- Department of Pathology, HUSLAB, HUS Diagnostic Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Erika Veikkolainen
- Applied Tumor Genomics Research Program, Research Programs Unit, University of Helsinki, Helsinki, Finland
- Department of Pathology, HUSLAB, HUS Diagnostic Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Iiris Ukkola
- Applied Tumor Genomics Research Program, Research Programs Unit, University of Helsinki, Helsinki, Finland
- Department of Pathology, HUSLAB, HUS Diagnostic Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Vincenzo Cinella
- Applied Tumor Genomics Research Program, Research Programs Unit, University of Helsinki, Helsinki, Finland
- Department of Pathology, HUSLAB, HUS Diagnostic Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Abiodun Ayo
- Translational Cancer Medicine Research Program, Research Programs Unit, University of Helsinki, Helsinki, Finland
| | - Muhammad Yasir Asghar
- Cell and Tissue Dynamics Research Program, Institute of Biotechnology, HiLife, University of Helsinki, Helsinki, Finland
- Minerva Foundation Institute for Medical Research, Helsinki, Finland
| | - Niko Välimäki
- Applied Tumor Genomics Research Program, Research Programs Unit, University of Helsinki, Helsinki, Finland
- Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
| | - Kid Törnquist
- Minerva Foundation Institute for Medical Research, Helsinki, Finland
- Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, Turku, Finland
| | - Auli Karhu
- Applied Tumor Genomics Research Program, Research Programs Unit, University of Helsinki, Helsinki, Finland
- Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
| | - Pirjo Laakkonen
- Translational Cancer Medicine Research Program, Research Programs Unit, University of Helsinki, Helsinki, Finland
| | - Lauri A Aaltonen
- Applied Tumor Genomics Research Program, Research Programs Unit, University of Helsinki, Helsinki, Finland
- Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
| | - Ari Ristimäki
- Applied Tumor Genomics Research Program, Research Programs Unit, University of Helsinki, Helsinki, Finland
- Department of Pathology, HUSLAB, HUS Diagnostic Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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3
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Li X, Liu G, Wu W. Progress in Biological Research and Treatment of Pseudomyxoma Peritonei. Cancers (Basel) 2024; 16:1406. [PMID: 38611084 PMCID: PMC11010892 DOI: 10.3390/cancers16071406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 03/28/2024] [Accepted: 03/30/2024] [Indexed: 04/14/2024] Open
Abstract
Pseudomyxoma peritonei (PMP) is a rare disease characterized by extensive peritoneal implantation and mass secretion of mucus after primary mucinous tumors of the appendix or other organ ruptures. Cytoreductive surgery (CRS) combined with hyperthermic intraperitoneal chemotherapy (HIPEC) is currently the preferred treatment, with excellent efficacy and safety, and is associated with breakthrough progress in long-term disease control and prolonged survival. However, the high recurrence rate of PMP is the key challenge in its treatment, which limits the clinical application of multiple rounds of CRS-HIPEC and does not benefit from conventional systemic chemotherapy. Therefore, the development of alternative therapies for patients with refractory or relapsing PMP is critical. The literature related to PMP research progress and treatment was searched in the Web of Science, PubMed, and Google Scholar databases, and a literature review was conducted. The overview of the biological research, treatment status, potential therapeutic strategies, current research limitations, and future directions associated with PMP are presented, focuses on CRS-HIPEC therapy and alternative or combination therapy strategies, and emphasizes the clinical transformation prospects of potential therapeutic strategies such as mucolytic agents and targeted therapy. It provides a theoretical reference for the treatment of PMP and the main directions for future research.
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Affiliation(s)
- Xi Li
- Department of Geriatric Surgery, Xiangya Hospital, Central South University, Changsha 410008, China;
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Guodong Liu
- Department of Geriatric Surgery, Xiangya Hospital, Central South University, Changsha 410008, China;
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Wei Wu
- Department of Geriatric Surgery, Xiangya Hospital, Central South University, Changsha 410008, China;
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
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4
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Zhang JC, Ma YY, Lan YZ, Li SB, Wang X, Hu JL. Evaluation of appendiceal mucinous neoplasms by curved linear-array echoendoscope: A preliminary study. World J Gastrointest Endosc 2023; 15:699-704. [PMID: 38187914 PMCID: PMC10768037 DOI: 10.4253/wjge.v15.i12.699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 11/25/2023] [Accepted: 12/06/2023] [Indexed: 12/15/2023] Open
Abstract
BACKGROUND Preoperative diagnosis of appendiceal mucinous neoplasms is challenging, and there are few reports regarding the endosonographic characteristics of these neoplasms.
AIM To provide a retrospective assessment of the imaging features of appendiceal mucinous neoplasms using endoscopic ultrasound (EUS) by curved linear-array echoendoscope.
METHODS A database of all patients with appendiceal mucinous neoplasms who had received EUS examination at our hospital between January 2018 and July 2023 was retrospectively analyzed. The EUS characteristics and patients’ clinical data were reviewed.
RESULTS Twenty-two patients were included in the study. The linear-array echoendoscope successfully reached the ileocecal region in every patient. In the endoscopic view, we could observe the protrusion in the appendiceal orifice in all patients. A volcano sign was observed in two patients, and an atypical volcano sign was seen in two patients. EUS showed that all 22 lesions were submucosal cystic hypoechoic lesions with clear boundaries. No wall nodules were observed, but an onion-peeling sign was observed in 17 cases.
CONCLUSION Linear-array echoendoscope is safe to reach the ileocecal region under the guidance of EUS. Image features on endoscopic and echoendosonograhic views could be used to diagnose appendiceal mucinous neoplasms.
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Affiliation(s)
- Jing-Chao Zhang
- Endoscopy Center, Hebei Cangzhou Hospital of Integrated Traditional Chinese Medicine and Western Medicine, Cangzhou 061000, Hebei Province, China
| | - Yang-Yang Ma
- Department of Gastrointestinal Surgery, Hebei Cangzhou Hospital of Integrated Traditional Chinese Medicine and Western Medicine, Cangzhou 061000, Hebei Province, China
| | - Yong-Zhen Lan
- Endoscopy Center, Hebei Cangzhou Hospital of Integrated Traditional Chinese Medicine and Western Medicine, Cangzhou 061000, Hebei Province, China
| | - Shuang-Biao Li
- Department of Pathology, Hebei Cangzhou Hospital of Integrated Traditional Chinese Medicine and Western Medicine, Cangzhou 061000, Hebei Province, China
| | - Xiao Wang
- Endoscopy Center, Hebei Cangzhou Hospital of Integrated Traditional Chinese Medicine and Western Medicine, Cangzhou 061000, Hebei Province, China
| | - Jin-Long Hu
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang 110001, Liaoning Province, China
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5
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Wald AI, Pingpank JF, Ongchin M, Hall LB, Jones H, Altpeter S, Liebdzinski M, Hamed AB, Derby J, Nikiforova MN, Bell PD, Paniccia A, Zureikat AH, Gorantla VC, Rhee JC, Thomas R, Bartlett DL, Smith K, Henn P, Theisen BK, Shyu S, Shalaby A, Choudry MHA, Singhi AD. Targeted Next-Generation Sequencing Improves the Prognostication of Patients with Disseminated Appendiceal Mucinous Neoplasms (Pseudomyxoma Peritonei). Ann Surg Oncol 2023; 30:7517-7526. [PMID: 37314541 DOI: 10.1245/s10434-023-13721-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 04/19/2023] [Indexed: 06/15/2023]
Abstract
BACKGROUND Appendiceal mucinous neoplasms (AMNs) with disseminated disease (pseudomyxoma peritonei) are heterogeneous tumors with variable clinicopathologic behavior. Despite the development of prognostic systems, objective biomarkers are needed to stratify patients. With the advent of next-generation sequencing (NGS), it remains unclear if molecular testing can improve the evaluation of disseminated AMN patients. METHODS Targeted NGS was performed for 183 patients and correlated with clinicopathologic features to include American Joint Committee on Cancer/World Health Organization (AJCC/WHO) histologic grade, peritoneal cancer index (PCI), completeness of cytoreduction (CC) score, and overall survival (OS). RESULTS Genomic alterations were identified for 179 (98%) disseminated AMNs. Excluding mitogen-activated protein kinase genes and GNAS due to their ubiquitous nature, collective genomic alterations in TP53, SMAD4, CDKN2A, and the mTOR genes were associated with older mean age, higher AJCC/WHO histologic grade, lymphovascular invasion, perineural invasion, regional lymph node metastasis, and lower mean PCI (p < 0.040). Patients harboring TP53, SMAD4, ATM, CDKN2A, and/or mTOR gene alterations were found to have lower OS rates of 55% at 5 years and 14% at 10 years, compared with 88% at 5 years and 88% at 10 years for patients without the aforementioned alterations (p < 0.001). Based on univariate and multivariate analyses, genomic alterations in TP53, SMAD4, ATM, CDKN2A, and/or the mTOR genes in disseminated AMNs were a negative prognostic factor for OS and independent of AJCC/WHO histologic grade, PCI, CC score, and hyperthermic intraperitoneal chemotherapy treatment (p = 0.006). CONCLUSIONS Targeted NGS improves the prognostic assessment of patients with disseminated AMNs and identifies patients who may require increased surveillance and/or aggressive management.
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Affiliation(s)
- Abigail I Wald
- Department of Pathology, UPMC Presbyterian Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - James F Pingpank
- Department of Surgery, UPMC Cancer Pavilion, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Melanie Ongchin
- Department of Surgery, UPMC Cancer Pavilion, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Lauren B Hall
- Department of Surgery, UPMC Cancer Pavilion, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Heather Jones
- Department of Surgery, UPMC Cancer Pavilion, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Shannon Altpeter
- Department of Surgery, UPMC Cancer Pavilion, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Michelle Liebdzinski
- Department of Surgery, UPMC Cancer Pavilion, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Ahmed B Hamed
- Department of Surgery, UPMC Cancer Pavilion, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Joshua Derby
- Department of Surgery, UPMC Cancer Pavilion, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Marina N Nikiforova
- Department of Pathology, UPMC Presbyterian Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Phoenix D Bell
- Department of Pathology, UPMC Presbyterian Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Alessandro Paniccia
- Department of Surgery, UPMC Cancer Pavilion, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Amer H Zureikat
- Department of Surgery, UPMC Cancer Pavilion, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Vikram C Gorantla
- Department of Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - John C Rhee
- Department of Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Roby Thomas
- Department of Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - David L Bartlett
- AHN Cancer Institute, Allegheny Health Network, Pittsburgh, PA, USA
| | - Katelyn Smith
- Department of Pathology, UPMC Presbyterian Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Patrick Henn
- Department of Pathology, University of Colorado Hospital, Aurora, CO, USA
| | - Brian K Theisen
- Department of Pathology, Henry Ford Health System, Detroit, MI, USA
| | - Susan Shyu
- Department of Pathology, WellSpan York Hospital, York, PA, USA
| | - Akram Shalaby
- Department of Pathology, UPMC Presbyterian Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - M Haroon A Choudry
- Department of Surgery, UPMC Cancer Pavilion, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
| | - Aatur D Singhi
- Department of Pathology, UPMC Presbyterian Hospital, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
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Miller LD, Votanopoulos KI. Exploring the Relationship: Low-Grade Appendiceal Mucinous Neoplasms (LAMN) and Mucinous Adenocarcinoma as Phases of the Same Disease Spectrum. Ann Surg Oncol 2023; 30:6976-6977. [PMID: 37639030 DOI: 10.1245/s10434-023-14076-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 07/24/2023] [Indexed: 08/29/2023]
Affiliation(s)
- Lance D Miller
- Department of Cancer Biology, Wake Forest Baptist Comprehensive Cancer Center, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Konstantinos I Votanopoulos
- Department of Surgery, Wake Forest Baptist Comprehensive Cancer Center, Wake Forest University School of Medicine, Winston-Salem, NC, USA.
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Amir B, Amir A, Sheikh S. High-grade appendiceal mucinous neoplasm presenting as renal colic; a case report and review of literature. J Surg Case Rep 2023; 2023:rjad567. [PMID: 37854517 PMCID: PMC10581701 DOI: 10.1093/jscr/rjad567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 09/24/2023] [Indexed: 10/20/2023] Open
Abstract
High-grade appendiceal mucinous neoplasms (HAMN) are rare mucinous appendiceal tumors that are mostly incidentally discovered and histologically show marked cytoplasmic atypia. We report a 62-year-old female patient who was diagnosed with acute right flank pain mimicking renal colic. Abdominal and pelvis CT scans showed no calculi or hydronephrosis. Incidentally, a markedly distended retrocecal appendix was identified and an appendectomy was performed. Histopathology revealed an HAMN of size 5.8 cm. HAMN are one of the rare and somewhat recently described epithelial appendiceal tumors. The latest 2019 classification is based on histologic appearance and on the consensus for classification and pathologic reporting of Pseudomyxoma peritonei and associated appendiceal neoplasia (Peritoneal Surface Pathology Group International, modified Delphi process). Histologically, appendiceal mucinous lesions are classified as nonneoplastic/mucocele and neoplastic lesions with separate subcategorization. Despite its rarity, it is crucial for clinicians to be aware of HAMN to distinguish it from other clinical differentials.
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Affiliation(s)
- Baraa Amir
- Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia
| | - Amaar Amir
- Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia
| | - Salwa Sheikh
- Pathology Services, John Hopkins Aramco Healthcare, Dhahran 34455, Saudi Arabia
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Fischer AK, Tannapfel A, Quaas A. [Mucinous tumors of the peritoneum]. CHIRURGIE (HEIDELBERG, GERMANY) 2023; 94:823-831. [PMID: 37418023 DOI: 10.1007/s00104-023-01926-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/12/2023] [Indexed: 07/08/2023]
Abstract
INTRODUCTION Disseminated peritoneal seeding of mucin-forming tumors is a rare malignant disease with variable prognosis. Histomorphological criteria are instrumental in the prognostic assessment. The past 10 years have led to a standardization of nomenclature and subsequently to the establishment of therapeutic standards. This article aims to provide the current status of the pathological classification, staging, and grading. METHOD AND MATERIAL Selective literature search in PubMed and Medline RESULTS: The vast majority of disseminated peritoneal mucinous diseases that correspond to the clinical presentation of pseudomyxoma peritonei (PMP) arise from mucinous tumors of the vermiform appendix. Here are to be distinguished: 1) low-grade appendiceal mucinous neoplasms (LAMN), 2) (very rare) high-grade appendiceal mucinous neoplasms (HAMN), 3) mucinous adenocarcinoma without signet ring cells (G2) and 4) mucinous adenocarcinoma with signet ring cells or signet ring cell carcinoma (G3). Other primary tumors only rarely induce PMP. Terms such as mucocele or mucinous cystadenoma of the appendix correspond to LAMN and should no longer be used. Prognostic distinctions are further made between low-grade PMP, which usually arises from LAMN, and the prognostically less favorable high-grade PMP, which usually arises from mucinous/signet ring cell adenocarcinoma or the rare HAMN. Disseminated peritoneal mucinous disease/PMP must then be further distinguished from prognostically excellent local mucin formation of the peri-appendix region. DISCUSSION The currently valid nomenclature, as it has emerged from consensus meetings and in parts has also found its way into the current WHO 2019, has significantly contributed to the fact that the prognosis of patients today can be better estimated and effective forms of treatment could be developed.
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Affiliation(s)
- Anne Kristin Fischer
- Institut für Pathologie, Universitätsklinikum Köln, Kerpener Str. 62, 50937, Köln, Deutschland.
| | - Andrea Tannapfel
- BG Universitätsklinikum Bergmannsheil Bochum, Bürkle de la Camp-Platz 1, 44789, Bochum, Deutschland
| | - Alexander Quaas
- Institut für Pathologie, Universitätsklinikum Köln, Kerpener Str. 62, 50937, Köln, Deutschland
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9
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Fleming AM, Deschner BW, Williard FW, Drake JA, Vanderwalde A, Xiu J, Somer BG, Yakoub D, Tsao MW, Glazer ES, Dickson PV, Shibata D, Philip PA, Hwang JJ, Shields AF, Marshall JL, Korn WM, Lenz HJ, Deneve JL. Peritoneal metastases from primary appendiceal and colorectal carcinomas demonstrate distinct molecular identities on comprehensive tumor analysis. J Surg Oncol 2023; 127:815-822. [PMID: 36629137 DOI: 10.1002/jso.27198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 12/08/2022] [Accepted: 01/01/2023] [Indexed: 01/12/2023]
Abstract
BACKGROUND AND OBJECTIVES Published data comparing peritoneal metastases from appendiceal cancers (pAC) and colorectal cancers (pCRC) remain sparse. We compared pAC and pCRC using comprehensive tumor profiling (CTP). METHODS CTP was performed, including next-generation sequencing and analysis of copy number variation (CNV), microsatellite instability (MSI) and tumor mutational burden (TMB). RESULTS One hundred thirty-six pAC and 348 pCRC samples underwent CTP. The cohorts' age and gender were similar. pCRC demonstrated increased pathogenic variants (PATHs) in APC (48% vs. 3%, p < 0.01), ARID1A (12% vs. 2%, p < 0.01), BRAF (12% vs. 2%, p < 0.01), FBXW7 (7% vs. 2%, p < 0.01), KRAS (52% vs. 41%, p < 0.05), PIK3CA (15% vs. 2%, p < 0.01), and TP53 (53% vs. 23%, p < 0.01), and decreased PATHs in GNAS (8% vs. 31%, p < 0.01). There was no difference in CNV, fusion rate, or MSI. Median TMB was higher in pCRC (5.8 vs. 5.0 mutations per megabase, p = 0.0007). Rates of TMB-high tumors were similar (pAC 2.1% vs. pCRC 9.0%, p = 0.1957). pCRC had significantly more TMB-high tumors at lower thresholds. CONCLUSIONS Despite a reduced overall TMB, pAC demonstrated mutations distinct from those seen in pCRC. These may serve as discrete biomarkers for future study.
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Affiliation(s)
- Andrew M Fleming
- Department of Surgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Benjamin W Deschner
- Department of Surgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA.,Division of Surgical Oncology, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Forrest W Williard
- College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Justin A Drake
- Department of Surgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Ari Vanderwalde
- West Cancer Center, Germantown, Tennessee, USA.,Caris Life Sciences, Irving, Texas, USA
| | | | | | - Danny Yakoub
- Department of Surgery, Mayo Clinic Health System, Eau Claire, Wisconsin, USA
| | - Miriam W Tsao
- Department of Surgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA.,Division of Surgical Oncology, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Evan S Glazer
- Department of Surgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA.,Division of Surgical Oncology, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Paxton V Dickson
- Department of Surgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA.,Division of Surgical Oncology, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - David Shibata
- Department of Surgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA.,Division of Surgical Oncology, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Philip A Philip
- Department of Oncology, Karmanos Cancer Institute, Wayne State University, Detroit, Michigan, USA
| | - Jimmy J Hwang
- Division of Hematology/Oncology, Atrium Health Levine Cancer Institute, Charlotte, North Carolina, USA
| | - Anthony F Shields
- Department of Oncology, Karmanos Cancer Institute, Wayne State University, Detroit, Michigan, USA
| | - John L Marshall
- Ruesch Center for the Cure of Gastrointestinal Cancers, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, District of Columbia, USA
| | - W Michael Korn
- Division of Hematology/Oncology, University of California, San Francisco, California, USA
| | - Heinz-Josef Lenz
- Keck School of Medicine, Norris Comprehensive Cancer Center, Division of Medical Oncology, University of Southern California, Los Angeles, California, USA
| | - Jeremiah L Deneve
- Department of Surgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA.,Division of Surgical Oncology, University of Tennessee Health Science Center, Memphis, Tennessee, USA
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10
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Foote MB, Walch H, Chatila W, Vakiani E, Chandler C, Steinruecke F, Nash GM, Stadler Z, Chung S, Yaeger R, Braghrioli MI, Shia J, Kemel Y, Maio A, Sheehan M, Rousseau B, Argilés G, Berger M, Solit D, Schultz N, Diaz LA, Cercek A. Molecular Classification of Appendiceal Adenocarcinoma. J Clin Oncol 2023; 41:1553-1564. [PMID: 36493333 PMCID: PMC10043565 DOI: 10.1200/jco.22.01392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 08/09/2022] [Accepted: 10/11/2022] [Indexed: 12/14/2022] Open
Abstract
PURPOSE Appendiceal adenocarcinomas (ACs) are rare, histologically diverse malignancies treated as colorectal cancers despite having distinct biology and clinical behavior. To guide clinical decision making, we defined molecular subtypes of AC associated with patient survival, metastatic burden, and chemotherapy response. PATIENTS AND METHODS A comprehensive molecular analysis was performed in patients with AC to define molecular subtypes. Associations between molecular subtype and overall survival, intraoperative peritoneal cancer index, and first-line chemotherapy response were assessed adjusting for histopathologic and clinical variables using multivariable Cox proportional hazards, linear regression, and logistic regression models. RESULTS We defined distinct molecular lineages of mucinous appendiceal adenocarcinoma (MAAP) from co-occurring mutations in GNAS, RAS, and TP53. Of 164 MAAP tumors, 24 were RAS-mutant (mut) predominant (RAS-mut/GNAS-wild-type [wt]/TP53-wt) with significantly decreased mutations and chromosomal alterations compared with tumors with GNAS mutations (GNAS-mut predominant) or TP53 mutations (TP53-mut predominant). No patient with RAS-mut predominant subtype metastatic MAAP died of cancer, and overall survival in this subgroup was significantly improved compared with patients with GNAS-mut (P = .05) and TP53-mut (P = .004) predominant subtypes. TP53-mut predominant subtypes were highly aneuploid; increased tumor aneuploidy was independently (P = .001) associated with poor prognosis. The findings retained significance in patients with any metastatic AC. RAS-mut predominant metastases exhibited reduced peritoneal tumor bulk (P = .04) and stromal invasion (P < .001) compared with GNAS-mut or TP53-mut predominant tumors, respectively. Patients with RAS-mut predominant MAAP responded more to first-line chemotherapy (50%) compared with patients with GNAS-mut predominant tumors (6%, P = .03). CONCLUSION AC molecular patterns identify distinct molecular subtypes: a clinically indolent RAS-mut/GNAS-wt/TP53-wt subtype; a chemotherapy-resistant GNAS-mut predominant subtype; and an aggressive, highly aneuploid TP53-mut predominant subtype. Each subtype exhibits conserved clinical behavior irrespective of histopathology.
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Affiliation(s)
- Michael B. Foote
- Division of Solid Tumor Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Henry Walch
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Walid Chatila
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY
- Marie-Josee and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Efsevia Vakiani
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Chris Chandler
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Felix Steinruecke
- Division of Solid Tumor Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Garrett M. Nash
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Zsofia Stadler
- Division of Solid Tumor Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Sebastian Chung
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Rona Yaeger
- Division of Solid Tumor Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Maria Ignez Braghrioli
- Division of Medical Oncology, Instituto do Câncer do Estado de São Paulo, São Paulo, Brazil
| | - Jinru Shia
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Yelena Kemel
- Niehaus Center for Inherited Cancer Genomics, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Anna Maio
- Niehaus Center for Inherited Cancer Genomics, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Margaret Sheehan
- Niehaus Center for Inherited Cancer Genomics, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Benoit Rousseau
- Division of Solid Tumor Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Guillem Argilés
- Division of Solid Tumor Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Michael Berger
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY
- Marie-Josee and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - David Solit
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY
- Marie-Josee and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Nikolaus Schultz
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY
- Marie-Josee and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Luis A. Diaz
- Division of Solid Tumor Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Andrea Cercek
- Division of Solid Tumor Oncology, Memorial Sloan Kettering Cancer Center, New York, NY
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11
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Murage NW, Ahmed NM, Underwood TJ, Walters ZS, Breininger SP. The genetic profile and molecular subtypes of human pseudomyxoma peritonei and appendiceal mucinous neoplasms: a systematic review. Cancer Metastasis Rev 2023; 42:335-359. [PMID: 36723696 PMCID: PMC10014681 DOI: 10.1007/s10555-023-10088-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 01/20/2023] [Indexed: 02/02/2023]
Abstract
Pseudomyxoma peritonei (PMP) is a rare, progressive, slowly growing neoplastic condition which is poorly understood, with a 5-year progression-free survival rate as low as 48%. PMP is most commonly caused by appendiceal mucinous neoplasms (AMN), and understanding their genetic biology and pathogenicity may allow for the development of better novel systemic treatments to target key deleterious mutations and the implicated pathways. The primary aim of this systematic review was to identify the genetic profile of histologically confirmed human PMP or AMN samples. The secondary aim was to identify whether genetic marks could be used to predict patient survival. Ovid EMBASE, Ovid MEDLINE, PubMed, and Web of Science were searched to identify studies investigating the genetic profile of histologically-confirmed human PMP or AMN samples. We review findings of 46 studies totalling 2181 tumour samples. The most frequently identified somatic gene mutations in patients with PMP included KRAS (38-100%), GNAS (17-100%), and TP53 (5-23%); however, there were conflicting results of their effect on survival. Three studies identified molecular subtypes based on gene expression profiles classifying patients into oncogene-enriched, immune-enriched, and mixed molecular subtypes with prognostic value. This review summarises the current literature surrounding genetic aberrations in PMP and AMNs and their potential utility for targeted therapy. Given the recent advances in clinical trials to directly target KRAS and GNAS mutations in other cancers, we propose a rationale to explore these mutations in future pre-clinical studies in PMP with a view for a future clinical trial.
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Affiliation(s)
- Nora Wangari Murage
- School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, SO17 1BJ, UK
| | - Nada Mabrouk Ahmed
- Pathology Department, Faculty of Medicine, Alexandria University, Alexandria, Egypt.,Institute of Cardiovascular Sciences, University College London, London, UK
| | - Timothy J Underwood
- School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, SO17 1BJ, UK
| | - Zoë S Walters
- School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, SO17 1BJ, UK
| | - Stella Panagio Breininger
- School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, SO17 1BJ, UK.
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12
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Taj S, Akbar UA, Philip S, Miller B, Haq Z, Sanekommu H, Hossain MA, Sciarra M. Appendiceal Bulge on Routine Colonoscopy: Not All Disease Is Luminal. Cureus 2023; 15:e35466. [PMID: 36999100 PMCID: PMC10043507 DOI: 10.7759/cureus.35466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/25/2023] [Indexed: 02/28/2023] Open
Abstract
Appendiceal mucocele is an extremely rare pathology accounting for 0.3-0.7% of all appendiceal pathology. It is characterized by appendiceal lumen dilatation by mucinous secretion collection. Though abdominal imaging and tissue Biopsy aids in diagnosis, suspicion should arise when a slight bulge or protrusion is seen on colonoscopy. We present a case of incidental appendiceal bulge found on a routine colonoscopy to evaluate abdominal pain that led to prompt diagnosis and management of appendiceal mucocele.
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13
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Umetsu SE, Kakar S. Staging of appendiceal mucinous neoplasms: challenges and recent updates. Hum Pathol 2023; 132:65-76. [PMID: 35843338 DOI: 10.1016/j.humpath.2022.07.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 07/08/2022] [Indexed: 02/07/2023]
Abstract
Low-grade appendiceal mucinous neoplasms are unique tumors of the appendix, characterized by low-grade mucinous epithelium with villiform, undulating, or flat architecture. These tumors lack infiltrative growth or destructive invasion, but can extend into the appendiceal wall by a "pushing" pattern of invasion, with a broad front that can mimic a diverticulum. These neoplasms have a propensity for peritoneal dissemination, resulting in the clinical presentation of pseudomyxoma peritonei. The pathologic staging of these neoplasms is challenging and fraught with confusing terminology and numerous classification systems. This review focuses on the AJCC pathologic staging of these tumors with a focus on challenging situations.
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Affiliation(s)
- Sarah E Umetsu
- Department of Pathology, University of California San Francisco, San Francisco, CA, 94143, USA.
| | - Sanjay Kakar
- Department of Pathology, University of California San Francisco, San Francisco, CA, 94143, USA
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14
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Gonzalez RS, Carr NJ, Liao H, Pai RK, Agostini-Vulaj D, Misdraji J. High-Grade Appendiceal Mucinous Neoplasm: Clinicopathologic Findings in 35 Cases. Arch Pathol Lab Med 2022; 146:1471-1478. [PMID: 35472721 DOI: 10.5858/arpa.2021-0430-oa] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/10/2021] [Indexed: 11/06/2022]
Abstract
CONTEXT.— High-grade appendiceal mucinous neoplasm (HAMN) is a relatively recently introduced term describing a rare epithelial neoplasm of the appendix that demonstrates pushing-type invasion but high-grade cytologic atypia. It remains understudied. OBJECTIVE.— To describe clinicopathologic features of HAMNs. DESIGN.— We identified 35 HAMNs in a multi-institutional retrospective study. Clinical and histologic features were reviewed in all cases, as well as molecular features in 8 cases. RESULTS.— Patients were 57 years of age on average and most commonly presented with abdominal/pelvic pain. Histologically, 57% of the tumors showed widespread high-grade features. Architectural patterns in high-grade areas included flat, undulating, or villous growth, and occasionally micropapillary, cribriform, or multilayered growth. Thirteen cases had intact serosa, and the remaining 22 perforated the serosa, including 7 with peritoneal acellular mucin beyond appendiceal serosa and 10 with grade 2 pseudomyxoma peritonei. Molecular abnormalities included KRAS mutations in 7 cases and TP53 mutations in 4. No tumor confined to the appendix recurred. Two patients without pseudomyxoma peritonei at initial presentation developed pseudomyxoma on follow-up. Among 11 patients who presented with pseudomyxoma peritonei, 5 died of disease and 3 were alive with disease at last follow-up. CONCLUSIONS.— HAMNs have a similar presentation to low-grade appendiceal mucinous neoplasm, and similar stage-based prognosis. When they spread to the peritoneum, they typically produce grade 2 pseudomyxoma peritonei, which may be associated with a worse prognosis than classical grade 1 pseudomyxoma peritonei.
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Affiliation(s)
- Raul S Gonzalez
- From the Department of Pathology, Beth Israel Deaconess Medical Center, Boston, Massachusetts (Gonzalez)
| | - Norman J Carr
- The Department of Pathology, Basingstoke and North Hampshire Hospital, Basingstoke, United Kingdom (Carr)
| | - Haihui Liao
- The Department of Pathology, University of Massachusetts Medical Center, Worcester (Liao)
| | - Reetesh K Pai
- The Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania (Pai)
| | - Diana Agostini-Vulaj
- The Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, New York (Agostini-Vulaj)
| | - Joseph Misdraji
- The Department of Pathology, Massachusetts General Hospital, Boston (Misdraji)
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15
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Afolabi HA, Salleh SM, Zakaria Z, Ch’ng ES, Mohd Nafi SN, Abdul Aziz AAB, Irekeola AA, Wada Y, Al-Mhanna SB. A GNAS Gene Mutation's Independent Expression in the Growth of Colorectal Cancer: A Systematic Review and Meta-Analysis. Cancers (Basel) 2022; 14:cancers14225480. [PMID: 36428574 PMCID: PMC9688108 DOI: 10.3390/cancers14225480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/11/2022] [Accepted: 10/12/2022] [Indexed: 11/10/2022] Open
Abstract
Globally, colorectal carcinoma CRC is the third most common cancer and the third most common reason for cancer-associated mortality in both genders. The GNAS mutations are significantly linked with poor prognosis and failed treatment outcomes in CRC. A systematic review and meta-analysis of multiple studies executed following Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) criteria and registered with PROSPERO (registration number: CRD42021256452). The initial search includes a total of 271 publications; however, only 30 studies that merit the eligibility criteria were eventually chosen. Data analysis via OpenMeta Analyst and comprehensive meta-analysis 3.0 (CMA 3.0) software were used to investigate the prevalence of GNAS gene mutation among CRC patients. The meta-analysis consisted of 10,689 participants with most being males 6068/10,689 (56.8%). Overall, prevalence of GNAS mutations was 4.8% (95% CI: 3.1−7.3) with I2 = 94.39% and (p < 0.001). In 11/30 studies, the frequency of GNAS gene mutations was majorly in codons R201C [40.7% (95% CI: 29.2−53.2%)] and in codon R201H [39.7% (95% CI = 27.1−53.8)]. Overall prevalence of GNAS mutations was highest among the male gender: 53.9% (95% CI: 48.2−59.5%: I2 = 94.00%, (p < 0.001), tumour location (colon): 50.5% (95% CI: 33.2−67.6%: I2 = 97.93%, (p < 0.001), tumour grade (Well): 57.5% (95% CI: 32.4−79.2%: I2 = 98.10%, (p < 0.001) and tumour late stage: 67.9% (95% CI: 49.7−84.3%: I2 = 98.%, (p < 0.001). When stratified according to study location, a higher prevalence was observed in Japan (26.8%) while Italy has the lowest (0.4%). Overall prevalence of GNAS gene mutations was 4.8% with codons R201C and R201H being the most mutated, and the results conformed with numerous published studies on GNAS mutation.
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Affiliation(s)
- Hafeez Abiola Afolabi
- Department of General Surgery, School of Medical Sciences, Hospital Universiti Sains Malaysia, Health Campus, Universiti Sains Malaysia, Kubang Kerian 16150, Malaysia
| | - Salzihan Md Salleh
- Department of Pathology, School of Medical Sciences, Hospital Universiti Sains Malaysia (HUSM), Health Campus, Universiti Sains Malaysia, Kubang Kerian 16150, Malaysia
- Department of Pathology, School of Medical Sciences, Universiti Sains Malaysia (USM), Health Campus, Kubang Kerian 16150, Malaysia
- Correspondence: or
| | - Zaidi Zakaria
- Department of General Surgery, School of Medical Sciences, Hospital Universiti Sains Malaysia, Health Campus, Universiti Sains Malaysia, Kubang Kerian 16150, Malaysia
| | - Ewe Seng Ch’ng
- Advanced Medical and Dental Institute, Universiti Sains Malaysia USM, Kepala Batas 13200, Malaysia
| | - Siti Norasikin Mohd Nafi
- Department of Pathology, School of Medical Sciences, Universiti Sains Malaysia (USM), Health Campus, Kubang Kerian 16150, Malaysia
| | - Ahmad Aizat Bin Abdul Aziz
- Department of Human Genome Centre, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian 16150, Malaysia
| | - Ahmad Adebayo Irekeola
- Department of Medical Microbiology and Parasitology, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian 16150, Malaysia
| | - Yusuf Wada
- Department of Medical Microbiology and Parasitology, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian 16150, Malaysia
| | - Sameer Badri Al-Mhanna
- Department of Physiology, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian 16150, Malaysia
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16
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Murakami T, Shimizu H, Yamazaki K, Nojima H, Usui A, Kosugi C, Shuto K, Obi S, Sato T, Yamazaki M, Koda K. Intra-abdominal ectopic bronchogenic cyst with a mucinous neoplasm harboring a GNAS mutation: A case report. World J Clin Cases 2022; 10:8709-8717. [PMID: 36157792 PMCID: PMC9453374 DOI: 10.12998/wjcc.v10.i24.8709] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/23/2022] [Accepted: 07/17/2022] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Bronchogenic cysts are congenital cysts caused by abnormal sprouting from the ventral foregut during fetal life. They usually occur in the mediastinum or lung, but there are very rare cases of ectopic bronchogenic cysts that develop in the abdominal cavity. A unique intra-abdominal ectopic bronchogenic cyst with a mucinous neoplasm that was producing carcinoembryonic antigen (CEA), harboring a GNAS mutation, is reported. The present case may contribute to clarifying the mechanism of tumorigenesis and malignant transformation of ectopic bronchogenic cysts.
CASE SUMMARY In 2007, a man in his 50s was incidentally found to have an intra-abdominal cystic mass, 8 cm in diameter. Surgical resection was recommended, but he preferred to remain under observation. In 2020, his serum CEA level increased to 26.7 ng/mL, and abdominal computed tomography showed a 15 cm × 12 cm, multifocal, cystic mass located predominantly on the lesser curvature of the stomach. Since malignancy could not be ruled out, he finally underwent surgical resection. Histologically, the cystic wall was lined by ciliated columnar epithelium, accompanied by bronchial gland-like tissue, bronchial cartilage, and smooth muscle. Part of the cyst consisted of atypical columnar epithelium with an MIB-1 index of 5% and positive for CEA. Moreover, a GNAS mutation (p.R201C) was detected in the atypical epithelium, leading to a diagnosis of an ectopic bronchogenic cyst with a low-grade mucinous neoplasm. The patient is currently undergoing outpatient follow-up without recurrence.
CONCLUSION An extremely rare case of an abdominal bronchogenic cyst with a low-grade mucinous neoplasm harboring a GNAS mutation was reported.
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Affiliation(s)
- Takashi Murakami
- Department of Surgery, Teikyo University Chiba Medical Center, Ichihara 299-0111, Chiba, Japan
| | - Hiroaki Shimizu
- Department of Surgery, Teikyo University Chiba Medical Center, Ichihara 299-0111, Chiba, Japan
| | - Kazuto Yamazaki
- Department of Pathology, Teikyo University Chiba Medical Center, Ichihara 299-0111, Chiba, Japan
| | - Hiroyuki Nojima
- Department of Surgery, Teikyo University Chiba Medical Center, Ichihara 299-0111, Chiba, Japan
| | - Akihiro Usui
- Department of Surgery, Teikyo University Chiba Medical Center, Ichihara 299-0111, Chiba, Japan
| | - Chihiro Kosugi
- Department of Surgery, Teikyo University Chiba Medical Center, Ichihara 299-0111, Chiba, Japan
| | - Kiyohiko Shuto
- Department of Surgery, Teikyo University Chiba Medical Center, Ichihara 299-0111, Chiba, Japan
| | - Shuntaro Obi
- Department of Internal Medicine, Teikyo University Chiba Medical Center, Ichihara 299-0111, Chiba, Japan
| | - Takahisa Sato
- Department of Internal Medicine, Teikyo University Chiba Medical Center, Ichihara 299-0111, Chiba, Japan
| | - Masato Yamazaki
- Department of Surgery, Teikyo University Chiba Medical Center, Ichihara 299-0111, Chiba, Japan
| | - Keiji Koda
- Department of Surgery, Teikyo University Chiba Medical Center, Ichihara 299-0111, Chiba, Japan
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17
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Oncogene addiction to GNAS in GNAS R201 mutant tumors. Oncogene 2022; 41:4159-4168. [PMID: 35879396 DOI: 10.1038/s41388-022-02388-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 05/28/2022] [Accepted: 06/15/2022] [Indexed: 11/09/2022]
Abstract
The GNASR201 gain-of-function mutation is the single most frequent cancer-causing mutation across all heterotrimeric G proteins, driving oncogenesis in various low-grade/benign gastrointestinal and pancreatic tumors. In this study, we investigated the role of GNAS and its product Gαs in tumor progression using peritoneal models of colorectal cancer (CRC). GNAS was knocked out in multiple CRC cell lines harboring GNASR201C/H mutations (KM12, SNU175, SKCO1), leading to decreased cell-growth in 2D and 3D organoid models. Nude mice were peritoneally injected with GNAS-knockout KM12 cells, leading to a decrease in tumor growth and drastically improved survival at 7 weeks. Supporting these findings, GNAS overexpression in LS174T cells led to increased cell-growth in 2D and 3D organoid models, and increased tumor growth in PDX mouse models. GNAS knockout decreased levels of cyclic AMP in KM12 cells, and molecular profiling identified phosphorylation of β-catenin and activation of its targets as critical downstream effects of mutant GNAS signaling. Supporting these findings, chemical inhibition of both PKA and β-catenin reduced growth of GNAS mutant organoids. Our findings demonstrate oncogene addiction to GNAS in peritoneal models of GNASR201C/H tumors, which signal through the cAMP/PKA and Wnt/β-catenin pathways. Thus, GNAS and its downstream mediators are promising therapeutic targets for GNAS mutant tumors.
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18
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Zhao XY, Li CQ, Zhang SY, Liu G. Case Report: An Unusual Case of Pulmonary Metastatic Adenocarcinoma From Low-Grade Appendiceal Mucinous Neoplasms. Front Oncol 2022; 12:906344. [PMID: 35912193 PMCID: PMC9327614 DOI: 10.3389/fonc.2022.906344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 06/13/2022] [Indexed: 11/28/2022] Open
Abstract
Background Low-grade appendiceal mucinous neoplasms (LAMNs) are indolent tumors with low-grade cytology. Although peritoneal dissemination is common due to tumor rupture and mucinous deposits on the visceral peritoneal surface, distant involvement, such as lung, is rarely seen due to lack of invasiveness. Case Presentation A 70-year-old woman presented to the hospital due to continuously elevated carcinoembryonic antigen (CEA) levels for 10 months without any symptoms. PET/CT revealed two lesions located in the left lung and appendix. The postoperative pathology results revealed pulmonary mucinous adenocarcinoma and LAMN. Then we performed next-generation sequencing (NGS) to clarify the relationship between the two tumors. The sequencing result showed that both tumors harbored the common tumor mutations, KRAS (p.G12D), GNAS (p.R201H), and BRAF (p.R735Q), which indicated that the pulmonary tumor was a metastasis of LAMN. Conclusion This case is unusual in that the primary LAMN and the pulmonary metastasis are present at the time of diagnosis. This study reported the first pulmonary metastasis from LAMN verified by NGS.
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19
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Kiyokawa T. Peritoneal Pathology Review: Mullerian, Mucinous and Mesothelial Lesions. Surg Pathol Clin 2022; 15:259-276. [PMID: 35715161 DOI: 10.1016/j.path.2022.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
This review provides an overview of the pathology of selected benign and malignant lesions of the female peritoneum and their often-encountered differential diagnoses. It includes endometriosis and its related lesions, endosalpingiosis, pseudomyxoma peritonei (PMP) and related ovarian/appendiceal pathology, and malignant and benign mesothelial tumors. The current terminology associated with PMP is also discussed.
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Affiliation(s)
- Takako Kiyokawa
- Department of Pathology, The Jikei University School of Medicine, 3-25-8 Nishishimbashi Minato-ku, Tokyo 105-8461, Japan.
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20
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Wang Z, Yin M, Shao J, Yin Z, Peng J, Lu Z. Clinicopathological Characteristics of Primary Appendiceal Mucinous Neoplasm and Recurrence After Radical Resection. Front Surg 2022; 9:902543. [PMID: 35599797 PMCID: PMC9114454 DOI: 10.3389/fsurg.2022.902543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 04/04/2022] [Indexed: 12/02/2022] Open
Abstract
Objective Appendiceal mucinous neoplasm (AMN) is a rare obstructive dilatation of the appendix caused by an intraluminal accumulation of mucoid material, showing an insidious onset and few specific clinical manifestations. The purpose of the study is to analyze clinicopathological characteristics of primary AMN and recurrence after radical resection. Methods A total of 50 patients were included in the retrospective cohort study of AMN. Patient data, such as demographics, tumor characteristics, surgical management, preoperative serum carcinoembryonic antigen (CEA), and carcinoembryonic antigen 19-9 (CA19-9) levels, were collected. All patients were followed-up with interval CT scans until the end of December 2021, with overall survival (OS) and progression-free survival (PFS) being calculated. Results All patients were confirmed as AMN by pathological diagnosis after surgery, including 28 cases (56.00%) of low-grade AMN (LAMN) and 22 cases (44.00%) of non-LAMN. Among 50 patients with AMN, there were 12 cases (24.00%) complicated with pseudomyxoma peritonei (PMP). Higher proportions of patients with pTis, pT3, pT4a, ruptured at presentation, and PMP were found in patients with non-LAMN patients than LAMN (p < 0.05). There was a remarkable difference about preoperative serum CA19-9 levels between patients with LAMN and non-LAMN (p = 0.044). Patients complicated with PMP had a higher proportion of patients with ruptured at presentation than those who were not (p < 0.001). The patients with PMP had increased tumor size compared with those without PMP (p = 0.031). Remarkable differences were observed in terms of preoperative serum CA19-9 (p = 0.009) levels between patients with PMP and without PMP. We performed a multivariate analysis of the presence or absence of PMP and found that ruptured at presentation was found to be a risk factor for PMP in patients with AMN (p = 0.003). The PFS in the patients with PMP and those without was 33.33% (4/12) and 2.63% (1/38), showing a significant difference (P = 0.002). Conclusion The study demonstrates that ruptured at presentation and PMP may influence the prognosis and survival of patients with AMN.
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Affiliation(s)
- Zaibiao Wang
- Department of General Surgery, Bozhou Hospital Affiliated to Anhui Medical University, Bozhou, China
| | - Manman Yin
- Department of Science and Education, Bozhou Hospital Affiliated to Anhui Medical University, Bozhou, China
| | - Jiayun Shao
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Zhipeng Yin
- Department of General Surgery, Bozhou Hospital Affiliated to Anhui Medical University, Bozhou, China
| | - Jie Peng
- Department of General Surgery, Bozhou Hospital Affiliated to Anhui Medical University, Bozhou, China
| | - Zhengmao Lu
- Department of General Surgery, Changhai Hospital, Naval Military Medical University of PLA, Shanghai, China
- *Correspondence: Zhengmao Lu
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Zaleski MP, Chen H, Roy-Chowdhuri S, Patel KP, Luthra R, Routbort MJ, Kamat AM, Gao J, Siefker-Radtke A, Czerniak B, Guo CC. Distinct Gene Mutations Are Associated With Clinicopathologic Features in Urachal Carcinoma. Am J Clin Pathol 2022; 158:263-269. [PMID: 35467000 PMCID: PMC9350833 DOI: 10.1093/ajcp/aqac039] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 03/04/2022] [Indexed: 12/26/2022] Open
Abstract
OBJECTIVES To investigate the gene mutational profile of urachal carcinoma in correlation with its clinicopathologic features. METHODS We analyzed genetic mutations in 30 cases of urachal carcinoma by next-generation sequencing (NGS) test. Histologic slides and clinical data were reviewed. RESULTS The patients included 21 men and 9 women, with a mean age of 53 years (range, 24-75 years). The urachal carcinomas included mucinous (11), enteric (10), signet ring cell (8), and high-grade neuroendocrine (1) subtypes. Targeted NGS analysis demonstrated genetic mutations in all the urachal tumors (mean, 2; range, 1-4). TP53 was the most mutated gene (25), followed by KRAS (9) and GNAS (8) genes. TP53 mutations were more common in the signet ring cell subtype (7/8), and GNAS mutations were present only in the mucinous (5/11) and signet ring cell subtypes (3/8) but not in the enteric subtype (0/10). KRAS mutations were significantly associated with cancer stage IV (P = .02) and younger patient age (P = .046). Furthermore, the presence of KRAS mutations in urachal carcinoma portended a poorer overall survival (P = .006). CONCLUSIONS Urachal carcinoma demonstrates frequent gene mutations that are associated with distinct clinicopathologic features. Gene mutation may underlie the development and progression of this aggressive disease.
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Affiliation(s)
- Michael P Zaleski
- Department Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Hui Chen
- Department Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Sinchita Roy-Chowdhuri
- Department Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Keyur P Patel
- Department Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Rajyalakshmi Luthra
- Department Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Mark J Routbort
- Department Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ashish M Kamat
- Department Urology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jianjun Gao
- Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Arlene Siefker-Radtke
- Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Bogdan Czerniak
- Department Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Charles C Guo
- Department Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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Chezar K, Minoo P. Appendiceal sessile serrated lesions are distinct from their right-sided colonic counterparts and may be precursors for appendiceal mucinous neoplasms. Hum Pathol 2022; 122:40-49. [PMID: 35121004 DOI: 10.1016/j.humpath.2022.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/23/2022] [Accepted: 01/25/2022] [Indexed: 11/30/2022]
Abstract
Low-grade appendiceal mucinous neoplasms (LAMNs) can occur concurrently with appendiceal sessile serrated lesions (SSLs). To interrogate relatedness, we performed multigene and immunohistochemical characterizations of paired and unpaired SSLs and LAMNs. We evaluated 62 serrated lesions from 50 appendectomy specimens for hotspot mutations in BRAF, KRAS and GNAS genes. Cases were subdivided into 3 groups: 20 unpaired SSLs, 18 unpaired LAMNs, and 12 with an SSL and concurrent LAMN. β-catenin and Annexin A10 immunostaining were performed on the SSL and LAMN components in the 12 paired cases, and fourteen colonic SSLs served as controls. There was no significant difference in KRAS hotspot mutation rates in appendiceal SSLs (17/26; 65.4%) and LAMNs (16/30; 53.3%) (p=0.42). BRAF V600E was identified in a single case (1/50; 2.0%) of SSL and concurrent LAMN (p=1.0). Mutations in GNAS were more common in LAMNs (6/30; 20.0%) compared to SSLs (1/31; 3.2%) (p=0.05). The molecular genotypes between paired SSLs and LAMNs were concordant in most cases (10/12; 83.3%). Annexin A10 immunostaining was significantly greater in colonic SSLs (14/14; 100%) compared to appendiceal SSLs (1/12; 8.3%) (p<0.0001). β-catenin immunostaining was significantly increased in LAMNs (10/12; 83.3%) compared to their paired appendiceal SSLs (2/12; 16.7%)(p=0.003). Overall, appendiceal sessile serrated lesions are predominantly driven by KRAS mutations and are not characterized by Annexin A10 immunostaining. Our data suggests that at least a subset of LAMNs may arise from a precursor SSL in which GNAS mutations and/or upregulation of the WNT-signaling pathway are likely key events modulating this progression.
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Affiliation(s)
- Ksenia Chezar
- Department of Pathology, Cumming School of Medicine and Alberta Precision Laboratories, University of Calgary, Calgary, Alberta, Canada
| | - Parham Minoo
- Department of Pathology, Cumming School of Medicine and Alberta Precision Laboratories, University of Calgary, Calgary, Alberta, Canada.
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Wang C, Sandhu J, Fakih M. OUP accepted manuscript. Oncologist 2022; 27:104-109. [PMID: 35641204 PMCID: PMC8895744 DOI: 10.1093/oncolo/oyab028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 10/01/2021] [Indexed: 11/12/2022] Open
Abstract
Background Limited studies have suggested that mucinous histology is associated an attenuated response to anti-epidermal growth factor receptor (EGFR) therapy. Methods We conducted a single-institution, retrospective study to review the anti-EGFR response and the molecular profile of patients with left-sided microsatellite stable RAS/BRAF wild-type mucinous metastatic colorectal cancer. Results In comparison to nonmucinous population (n = 98), mucinous histology (n = 20) was associated with a younger age (48 vs 54, P = .02), wild-type APC (80% vs 15.3%, P < .0001), and wild-type TP53 (40% vs 8.2%, P = .001). Guanine nucleotide binding protein, alpha stimulating (GNAS) mutations were exclusively found in mucinous tumors (20% vs 0, P < .0001). Genomic alterations associated with resistance to anti-EGFR therapy, such as ERBB2 amplification, PIK3CA mutation, MAP2K1 mutation, and KRAS amplification, were identified in patients with left-sided RAS/BRAF wild-type mucinous metastatic colorectal cancer. Mucinous histology was not associated with a worse outcome than non-mucinous histology (34.3 vs 42.2 months, P = .85). However, patients with left-sided RAS/BARF wild-type mucinous colorectal cancer treated with first-line anti-EGFR therapy had significantly worse progression-free survival (4 vs 6.5 months, hazard ratio [HR] = 5.3, 95% confidence interval [CI] 1.3-21.7, P = .01) than patients treated with the first-line vascular endothelial growth factor A antibody, bevacizumab. Anti-EGFR therapy was associated with limited responses and a short PFS across all lines of therapy in 12 patients with left-sided RAS/BRAF wild-type mucinous colorectal cancer. Conclusions Mucinous histology is associated with diminished benefits from anti-EGFR therapy in patients with left-sided RAS/BRAF wild-type colorectal cancer. These patients should be considered for bevacizumab-based therapy in the first- and second-line settings.
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Affiliation(s)
- Chongkai Wang
- Department of Medical Oncology and Therapeutics Research, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Jaideep Sandhu
- Department of Medical Oncology and Therapeutics Research, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Marwan Fakih
- Department of Medical Oncology and Therapeutics Research, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
- Corresponding author: Marwan Fakih, MD, Department of Medical Oncology and Therapeutics Research, Judy and Bernard Briskin Distinguished Director of Clinical Research Associate Director, Clinical Sciences, Medical Director, Briskin Center for Clinical Research, Section Head, GI Medical Oncology, Co-Director, Gastrointestinal Cancer Program, City of Hope Comprehensive Cancer Center, 1500 E. Duarte Road, Duarte, CA 91010, USA;
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Genetic Mutations of Pancreatic Cancer and Genetically Engineered Mouse Models. Cancers (Basel) 2021; 14:cancers14010071. [PMID: 35008235 PMCID: PMC8750056 DOI: 10.3390/cancers14010071] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 12/15/2021] [Accepted: 12/16/2021] [Indexed: 02/06/2023] Open
Abstract
Simple Summary Pancreatic ductal adenocarcinoma (PDAC) is a highly aggressive malignancy. Recent multi-gene analysis approaches such as next-generation sequencing have provided useful information on the molecular characterization of pancreatic tumors. Different types of pancreatic cancer and precursor lesions are characterized by specific molecular alterations. Genetically engineered mouse models (GEMMs) of PDAC are useful tools to understand the roles of altered genes. Most GEMMs are driven by oncogenic Kras, and can recapitulate the histological and molecular hallmarks of human PDAC and comparable precursor lesions. In this review, we summarize the main molecular alterations found in pancreatic neoplasms and GEMMs developed based on these alterations. Abstract Pancreatic ductal adenocarcinoma (PDAC) is a highly aggressive malignancy, and the seventh leading cause of cancer-related deaths worldwide. An improved understanding of tumor biology and novel therapeutic discoveries are needed to improve overall survival. Recent multi-gene analysis approaches such as next-generation sequencing have provided useful information on the molecular characterization of pancreatic tumors. Different types of pancreatic cancer and precursor lesions are characterized by specific molecular alterations. Genetically engineered mouse models (GEMMs) of PDAC are useful to understand the roles of altered genes. Most GEMMs are driven by oncogenic Kras, and can recapitulate the histological and molecular hallmarks of human PDAC and comparable precursor lesions. Advanced GEMMs permit the temporally and spatially controlled manipulation of multiple target genes using a dual-recombinase system or CRISPR/Cas9 gene editing. GEMMs that express fluorescent proteins allow cell lineage tracing to follow tumor growth and metastasis to understand the contribution of different cell types in cancer progression. GEMMs are widely used for therapeutic optimization. In this review, we summarize the main molecular alterations found in pancreatic neoplasms, developed GEMMs, and the contribution of GEMMs to the current understanding of PDAC pathobiology. Furthermore, we attempted to modify the categorization of altered driver genes according to the most updated findings.
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Csanyi-Bastien M, Blanchard F, Lamy A, Sabourin JC. A case of Pseudomyxoma Peritonei of an unexpected origin. Diagn Pathol 2021; 16:119. [PMID: 34930348 PMCID: PMC8686532 DOI: 10.1186/s13000-021-01179-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/28/2021] [Indexed: 11/23/2022] Open
Abstract
Background Pseudomyxoma peritonei (PMP) is a complex and partially understood disease defined by mucin deposits in the peritoneal cavity, mostly of appendiceal origin caused by the rupture of a mucocele often containing Low or High grade Appendiceal Mucinous Neoplasm (LAMN/HAMN). Other origins include primitive ovarian mucinous cystadenoma or cystadenocarcinoma almost always with an associated teratoma, but to our knowledge no case of ovarian teratomatous appendiceal-like mucocele with LAMN has been reported as a cause of PMP. Case presentation A 25-year old female with infertility was diagnosed with an isolated left ovarian tumor in a context of PMP. Histological examination revealed an ovarian teratoma containing an appendiceal-like structure with mucocele and LAMN, without any associated lesion of the appendix on full histological analysis. Molecular characterization of the ovarian lesion showed co-KRAS and GNAS mutations, as described in PMP of appendiceal origin, while only KRAS mutations are reported in primitive ovarian mucinous tumor. Conclusions Detection of co-KRAS and GNAS mutations in our case of ovarian teratomatous appendiceal-like mucocele with LAMN shows that when PMP derives from a mucinous ovarian lesion (with histological proof of none-appendiceal involvement), it is probably of a digestive teratomatous origin, emphasizing the need to actively search for tetatomatous signs in a context of ovarian PMP.
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Garland-Kledzik M, Scholer A, Ensenyat-Mendez M, Orozco JIJ, Khader A, Santamaria-Barria J, Fischer T, Pigazzi A, Marzese DM. Establishing Novel Molecular Subtypes of Appendiceal Cancer. Ann Surg Oncol 2021; 29:2118-2125. [PMID: 34718915 DOI: 10.1245/s10434-021-10945-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 09/24/2021] [Indexed: 01/03/2023]
Abstract
PURPOSE Appendiceal cancer is a rare disease process with complex treatment strategies. The objective of this study was to identify mutation-based genetic subtypes that may differ from the current histological classification, compare the genetic make-up of primaries and metastases, and find novel targetable alterations. METHODS The analyses involved the curation and normalization of gene mutation panels from appendiceal adenocarcinoma and mucinous adenocarcinoma (n = 196) stored in the AACR GENIE Database v6.0. Genes mutated in less than one patient and tumors profiled with incomplete mutation panels were excluded from the study. The optimal number of AC subtypes was established using the Nonnegative Matrix Factorization algorithm. Statistical comparisons of mutation frequencies were performed using Pearson's χ2 test. RESULTS AC patients were stratified into five mutation subtypes, based on a final set of 41 cancer-related genes. AC0 had no mutations. The most frequently mutated genes varied between the subtypes were: AC1: KRAS (91.9%) and GNAS (77.4%); AC2: KRAS (52.5%), APC (32.5%), and GNAS (30%); AC3: KMT2D (38.7%), TP53 (38.7%), KRAS (35.5%), EP300 (22.6%); and AC4: TP53 (97.2%), KRAS (77.8%), and SMAD4 (36.1%). Additionally, AC3 was less likely to be mucinous (22.6% vs. 50.0-74.2%, p < 0.001) and had a higher mutation frequency (3.6 vs. 0-3.1, p < 0.001). There were no significant differences between primary tumors and metastases in the 41 assessed genes (p = 0.35). CONCLUSIONS The characterization of these subtypes suggests a need for molecular approaches to complement anatomical and histopathological staging for AC. A prospective comparison of subtype prognosis and response to surgery and adjuvant treatment is needed to identify the clinical applications of the novel molecular subtypes.
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Affiliation(s)
| | - Anthony Scholer
- Department of Surgery, Saint John's Cancer Institute at Providence St. John's Health Center, Santa Monica, CA, USA
| | - Miquel Ensenyat-Mendez
- Cancer Epigenetic Laboratory, Health Research Institute of the Balearic Islands (IdISBa), Palma, Islas Baleares, Spain
| | - Javier I J Orozco
- Cancer Epigenetics Laboratory, Saint John's Cancer Institute at Providence St. John's Health Center, Santa Monica, CA, USA
| | - Adam Khader
- Department of Surgery, Saint John's Cancer Institute at Providence St. John's Health Center, Santa Monica, CA, USA
| | - Juan Santamaria-Barria
- Department of Surgery, Saint John's Cancer Institute at Providence St. John's Health Center, Santa Monica, CA, USA
| | - Trevan Fischer
- Department of Surgery, Saint John's Cancer Institute at Providence St. John's Health Center, Santa Monica, CA, USA
| | - Alessio Pigazzi
- Colon and Rectal Surgery, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, NY, USA
| | - Diego M Marzese
- Cancer Epigenetic Laboratory, Health Research Institute of the Balearic Islands (IdISBa), Palma, Islas Baleares, Spain
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Ramms DJ, Raimondi F, Arang N, Herberg FW, Taylor SS, Gutkind JS. G αs-Protein Kinase A (PKA) Pathway Signalopathies: The Emerging Genetic Landscape and Therapeutic Potential of Human Diseases Driven by Aberrant G αs-PKA Signaling. Pharmacol Rev 2021; 73:155-197. [PMID: 34663687 PMCID: PMC11060502 DOI: 10.1124/pharmrev.120.000269] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Many of the fundamental concepts of signal transduction and kinase activity are attributed to the discovery and crystallization of cAMP-dependent protein kinase, or protein kinase A. PKA is one of the best-studied kinases in human biology, with emphasis in biochemistry and biophysics, all the way to metabolism, hormone action, and gene expression regulation. It is surprising, however, that our understanding of PKA's role in disease is largely underappreciated. Although genetic mutations in the PKA holoenzyme are known to cause diseases such as Carney complex, Cushing syndrome, and acrodysostosis, the story largely stops there. With the recent explosion of genomic medicine, we can finally appreciate the broader role of the Gαs-PKA pathway in disease, with contributions from aberrant functioning G proteins and G protein-coupled receptors, as well as multiple alterations in other pathway components and negative regulators. Together, these represent a broad family of diseases we term the Gαs-PKA pathway signalopathies. The Gαs-PKA pathway signalopathies encompass diseases caused by germline, postzygotic, and somatic mutations in the Gαs-PKA pathway, with largely endocrine and neoplastic phenotypes. Here, we present a signaling-centric review of Gαs-PKA-driven pathophysiology and integrate computational and structural analysis to identify mutational themes commonly exploited by the Gαs-PKA pathway signalopathies. Major mutational themes include hotspot activating mutations in Gαs, encoded by GNAS, and mutations that destabilize the PKA holoenzyme. With this review, we hope to incite further study and ultimately the development of new therapeutic strategies in the treatment of a wide range of human diseases. SIGNIFICANCE STATEMENT: Little recognition is given to the causative role of Gαs-PKA pathway dysregulation in disease, with effects ranging from infectious disease, endocrine syndromes, and many cancers, yet these disparate diseases can all be understood by common genetic themes and biochemical signaling connections. By highlighting these common pathogenic mechanisms and bridging multiple disciplines, important progress can be made toward therapeutic advances in treating Gαs-PKA pathway-driven disease.
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Affiliation(s)
- Dana J Ramms
- Department of Pharmacology (D.J.R., N.A., J.S.G.), Department of Chemistry and Biochemistry (S.S.T.), and Moores Cancer Center (D.J.R., N.A., J.S.G.), University of California, San Diego, La Jolla, California; Laboratorio di Biologia Bio@SNS, Scuola Normale Superiore, Pisa, Italy (F.R.); and Department of Biochemistry, University of Kassel, Kassel, Germany (F.W.H.)
| | - Francesco Raimondi
- Department of Pharmacology (D.J.R., N.A., J.S.G.), Department of Chemistry and Biochemistry (S.S.T.), and Moores Cancer Center (D.J.R., N.A., J.S.G.), University of California, San Diego, La Jolla, California; Laboratorio di Biologia Bio@SNS, Scuola Normale Superiore, Pisa, Italy (F.R.); and Department of Biochemistry, University of Kassel, Kassel, Germany (F.W.H.)
| | - Nadia Arang
- Department of Pharmacology (D.J.R., N.A., J.S.G.), Department of Chemistry and Biochemistry (S.S.T.), and Moores Cancer Center (D.J.R., N.A., J.S.G.), University of California, San Diego, La Jolla, California; Laboratorio di Biologia Bio@SNS, Scuola Normale Superiore, Pisa, Italy (F.R.); and Department of Biochemistry, University of Kassel, Kassel, Germany (F.W.H.)
| | - Friedrich W Herberg
- Department of Pharmacology (D.J.R., N.A., J.S.G.), Department of Chemistry and Biochemistry (S.S.T.), and Moores Cancer Center (D.J.R., N.A., J.S.G.), University of California, San Diego, La Jolla, California; Laboratorio di Biologia Bio@SNS, Scuola Normale Superiore, Pisa, Italy (F.R.); and Department of Biochemistry, University of Kassel, Kassel, Germany (F.W.H.)
| | - Susan S Taylor
- Department of Pharmacology (D.J.R., N.A., J.S.G.), Department of Chemistry and Biochemistry (S.S.T.), and Moores Cancer Center (D.J.R., N.A., J.S.G.), University of California, San Diego, La Jolla, California; Laboratorio di Biologia Bio@SNS, Scuola Normale Superiore, Pisa, Italy (F.R.); and Department of Biochemistry, University of Kassel, Kassel, Germany (F.W.H.)
| | - J Silvio Gutkind
- Department of Pharmacology (D.J.R., N.A., J.S.G.), Department of Chemistry and Biochemistry (S.S.T.), and Moores Cancer Center (D.J.R., N.A., J.S.G.), University of California, San Diego, La Jolla, California; Laboratorio di Biologia Bio@SNS, Scuola Normale Superiore, Pisa, Italy (F.R.); and Department of Biochemistry, University of Kassel, Kassel, Germany (F.W.H.)
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Diaconescu S, Gîlcă-Blanariu GE, Poamaneagra S, Marginean O, Paduraru G, Stefanescu G. Could the burden of pancreatic cancer originate in childhood? World J Gastroenterol 2021; 27:5322-5340. [PMID: 34539135 PMCID: PMC8409163 DOI: 10.3748/wjg.v27.i32.5322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 06/08/2021] [Accepted: 07/30/2021] [Indexed: 02/06/2023] Open
Abstract
The presence of pancreatic cancer during childhood is extremely rare, and physicians may be tempted to overlook this diagnosis based on age criteria. However, there are primary malignant pancreatic tumors encountered in pediatric patients, such as pancreatoblastoma, and tumors considered benign in general but may present a malignant potential, such as the solid pseudo-papillary tumor, insulinoma, gastrinoma, and vasoactive intestinal peptide secreting tumor. Their early diagnosis and management are of paramount importance since the survival rates tend to differ for various types of these conditions. Many pediatric cancers may present pancreatic metastases, such as renal cell carcinoma, which may evolve with pancreatic metastatic disease even after two or more decades. Several childhood diseases may create a predisposition for the development of pancreatic cancer during adulthood; hence, there is a need for extensive screening strategies and complex programs to facilitate the transition from pediatric to adult healthcare. Nevertheless, genetic studies highlight the fact the specific gene mutations and family aggregations may be correlated with a special predisposition towards pancreatic cancer. This review aims to report the main pancreatic cancers diagnosed during childhood, the most important childhood diseases predisposing to the development of pancreatic malignancies, and the gene mutations associates with pancreatic malignant tumors.
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Affiliation(s)
- Smaranda Diaconescu
- Department of Pediatrics, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi 700115, Romania
- Department of Pediatric Gastroenterology, St Mary Emergency Children's Hospital, Iasi 700309, Romania
| | - Georgiana Emmanuela Gîlcă-Blanariu
- Department of Gastroenterology and Hepatology, "Grigore T. Popa" University of Medicine and Pharmacy, Iasi 700115, Romania
- Department of Gastroenterology and Hepatology, “St. Spiridon” Emergency Hospital, Iasi 700111, Romania
| | - Silvia Poamaneagra
- Department of Pediatric Gastroenterology, St Mary Emergency Children's Hospital, Iasi 700309, Romania
- Doctoral School, George Emil Palade University of Medicine, Pharmacy, Science and Technology, Targu Mures 540142, Romania
| | - Otilia Marginean
- Department of Pediatrics, Research Center of Disturbance of Growth and Development on Children-Belive, University of Medicine and Pharmacy “Victor Babes” Timisoara, Timisoara 300041, Romania
- First Clinic of Pediatrics, "Louis Turcanu" Emergency Childen's Hospital, Timisoara 300011, Romania
| | - Gabriela Paduraru
- Department of Pediatrics, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi 700115, Romania
- Department of Pediatric Gastroenterology, St Mary Emergency Children's Hospital, Iasi 700309, Romania
| | - Gabriela Stefanescu
- Department of Gastroenterology and Hepatology, "Grigore T. Popa" University of Medicine and Pharmacy, Iasi 700115, Romania
- Department of Gastroenterology and Hepatology, “St. Spiridon” Emergency Hospital, Iasi 700111, Romania
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Arang N, Gutkind JS. G Protein-Coupled receptors and heterotrimeric G proteins as cancer drivers. FEBS Lett 2021; 594:4201-4232. [PMID: 33270228 DOI: 10.1002/1873-3468.14017] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 10/09/2020] [Accepted: 10/26/2020] [Indexed: 12/13/2022]
Abstract
G protein-coupled receptors (GPCRs) and heterotrimeric G proteins play central roles in a diverse array of cellular processes. As such, dysregulation of GPCRs and their coupled heterotrimeric G proteins can dramatically alter the signalling landscape and functional state of a cell. Consistent with their fundamental physiological functions, GPCRs and their effector heterotrimeric G proteins are implicated in some of the most prevalent human diseases, including a complex disease such as cancer that causes significant morbidity and mortality worldwide. GPCR/G protein-mediated signalling impacts oncogenesis at multiple levels by regulating tumour angiogenesis, immune evasion, metastasis, and drug resistance. Here, we summarize the growing body of research on GPCRs and their effector heterotrimeric G proteins as drivers of cancer initiation and progression, and as emerging antitumoural therapeutic targets.
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Affiliation(s)
- Nadia Arang
- Department of Pharmacology, Moores Cancer Center, University of California, San Diego, La Jolla, CA, USA
| | - J Silvio Gutkind
- Department of Pharmacology, Moores Cancer Center, University of California, San Diego, La Jolla, CA, USA
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30
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Kato N, Kamataki A, Kurotaki H. Methylation profile of imprinted genes provides evidence for teratomatous origin of a subset of mucinous ovarian tumours. J Pathol 2021; 254:567-574. [PMID: 33983633 DOI: 10.1002/path.5702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 04/29/2021] [Accepted: 05/10/2021] [Indexed: 11/07/2022]
Abstract
Mucinous ovarian tumours are sometimes associated with mature teratomas. It is suggested that the mucinous tumours in this setting are derived from teratomas, but there remains the possibility of collision or metastasis from extra-ovarian sites. Because mature ovarian teratomas are considered to be parthenogenetic tumours that arise from a single oocyte/ovum, they have only a maternal genome and therefore show maternal genome imprinting. If mucinous ovarian tumours originate from teratomas, their genome imprinting is theoretically maternal. One of the most important mechanisms of genome imprinting is DNA methylation. In the present study, we analysed a total of 28 mucinous ovarian tumours (7 with teratomas, 21 without teratomas; 14 malignant, 14 borderline) to clarify the methylation profiles of their imprinted genes using methylation-specific multiplex ligation-dependent probe amplification (MS-MLPA) of 21 imprinting control regions (ICRs) of nine imprinted genes/gene clusters using formalin-fixed, paraffin-embedded samples. All cases lacked evidence of an extra-ovarian primary mucinous tumour. In all seven mucinous tumours with teratomas, the overall methylation profile of mucinous tumours was comparable to that of teratomas, although some ICRs showed aberrant methylation. In contrast, all but one of the mucinous tumours without teratomas showed somatic or irregular methylation patterns. Morphologically, there was little teratomatous tissue in some mucinous tumours carrying teratoma-type methylation profiles, suggesting that mucinous tumours overwhelmed ancestral teratomas. In conclusion, the methylation profile of imprinted genes provides evidence that a subset of mucinous ovarian tumours originated from mature teratomas. Genome imprinting-based analysis is a promising strategy to verify the teratomatous origin of human tumours. © 2021 The Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Noriko Kato
- Department of Anatomic Pathology, Hirosaki University School of Medicine and Hospital, Hirosaki, Japan
| | - Akihisa Kamataki
- Department of Anatomic Pathology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Hidekachi Kurotaki
- Department of Pathology, Aomori Prefectural Central Hospital, Aomori, Japan
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Gonzalez RS, Raza A, Propst R, Adeyi O, Bateman J, Sopha SC, Shaw J, Auerbach A. Recent Advances in Digestive Tract Tumors: Updates From the 5th Edition of the World Health Organization "Blue Book". Arch Pathol Lab Med 2021; 145:607-626. [PMID: 32886739 DOI: 10.5858/arpa.2020-0047-ra] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/12/2020] [Indexed: 11/06/2022]
Abstract
CONTEXT.— The World Health Organization Classification of Tumours: Digestive System Tumors, 5th edition, was published in 2019 and shows several impactful changes as compared with the 4th edition published in 2010. Changes include a revised nomenclature of serrated lesions and revamping the classification of neuroendocrine neoplasms. Appendiceal goblet cell adenocarcinoma is heavily revised, and intrahepatic cholangiocarcinoma is split into 2 subtypes. New subtypes of colorectal carcinoma and hepatocellular carcinoma are described. Precursor lesions are emphasized with their own entries, and both dysplastic and invasive lesions are generally recommended to be graded using a 2-tier system. Hematolymphoid tumors, mesenchymal tumors, and genetic tumor syndromes each have their own sections in the 5th edition. New hematolymphoid lesions include monomorphic epitheliotropic intestinal T-cell lymphoma; duodenal-type follicular lymphoma; intestinal T-cell lymphoma, not otherwise specified; and indolent T-cell lymphoproliferative disorder of the gastrointestinal tract. This paper will provide an in-depth look at the changes in the 5th edition as compared with the 4th edition. OBJECTIVE.— To provide a comprehensive, in-depth update on the World Health Organization classification of digestive tumors, including changes to nomenclature, updated diagnostic criteria, and newly described entities. DATA SOURCES.— The 5th edition of the World Health Organization Classification of Tumours: Digestive System Tumours, as well as the 4th edition. CONCLUSIONS.— The World Health Organization has made many key changes in its newest update on tumors of the digestive system. Pathologists should be aware of these changes and incorporate them into their practice as able or necessary.
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Affiliation(s)
- Raul S Gonzalez
- The Department of Pathology, Beth Israel Deaconess Medical Center, Boston, Massachusetts (Gonzalez)
| | - Anwar Raza
- The Department of Pathology and Human Anatomy, Loma Linda University, Loma Linda, California (Raza, Propst)
| | - Robert Propst
- The Department of Pathology and Human Anatomy, Loma Linda University, Loma Linda, California (Raza, Propst)
| | - Oyedele Adeyi
- The Department of Pathology, University of Minnesota, Minneapolis (Adeyi, Bateman)
| | - Justin Bateman
- The Department of Pathology, University of Minnesota, Minneapolis (Adeyi, Bateman)
| | - Sabrina C Sopha
- The Department of Pathology, University of Maryland Baltimore Washington Medical Center, Glen Burnie (Sopha)
| | - Janet Shaw
- The Joint Pathology Center, Silver Spring, Maryland (Shaw, Auerbach)
| | - Aaron Auerbach
- The Joint Pathology Center, Silver Spring, Maryland (Shaw, Auerbach)
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32
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Vanoli A, Grillo F, Furlan D, Arpa G, Grami O, Guerini C, Riboni R, Mastracci L, Di Sabatino A. Small Bowel Epithelial Precursor Lesions: A Focus on Molecular Alterations. Int J Mol Sci 2021; 22:ijms22094388. [PMID: 33922305 PMCID: PMC8122855 DOI: 10.3390/ijms22094388] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/18/2021] [Accepted: 04/20/2021] [Indexed: 12/15/2022] Open
Abstract
The wider use of gastrointestinal endoscopic procedures has led to an increased detection of small intestinal preneoplastic and neoplastic epithelial lesions, most of which are identified in the duodenum and ampullary region. Like their malignant counterparts, small intestinal glandular precursor lesions, which include adenomas and hamartomas, may arise sporadically or be associated with hereditary tumor syndromes, such as familial adenomatous polyposis, MUTYH-associated polyposis, Lynch syndrome, Peutz-Jeghers syndrome, juvenile polyposis syndrome, and Cowden syndrome. In addition, dysplastic, preinvasive lesions have been observed adjacent to small bowel adenocarcinomas complicating immune-related disorders, such as celiac or Crohn’s disease. Adenomatous lesions may exhibit an intestinal-type, gastric-type, or, very rarely, serrated differentiation, related to different molecular pathogenetic mechanisms. Finally, in the background of multiple endocrine neoplasia 1 syndrome, precursor neuroendocrine growths have been described. In this review we offer a comprehensive description on the histo-molecular features of the main histotypes of small bowel epithelial precursors lesions, including: (i) sporadic adenomas (intestinal-type and gastric-type; non-ampullary and ampullary); (ii) syndromic adenomas; (iii) small bowel dysplasia in celiac and Crohn’s disease; (iv) serrated lesions; (v) hamartomatous lesions; and (vi) neuroendocrine precursor lesions.
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Affiliation(s)
- Alessandro Vanoli
- Anatomic Pathology Unit, Department of Molecular Medicine, University of Pavia and Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Lombardy, Italy; (G.A.); (O.G.); (C.G.); (R.R.)
- Correspondence: ; Tel.: +39-0382503612
| | - Federica Grillo
- Pathology Unit, Department of Surgical and Diagnostic Sciences, University of Genoa and Ospedale Policlinico San Martino University Hospital, 16132 Genoa, Liguria, Italy; (F.G.); (L.M.)
| | - Daniela Furlan
- Pathology Unit, Department of Medicine and Surgery, University of Insubria, 21100 Varese, Lombardy, Italy;
| | - Giovanni Arpa
- Anatomic Pathology Unit, Department of Molecular Medicine, University of Pavia and Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Lombardy, Italy; (G.A.); (O.G.); (C.G.); (R.R.)
| | - Oneda Grami
- Anatomic Pathology Unit, Department of Molecular Medicine, University of Pavia and Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Lombardy, Italy; (G.A.); (O.G.); (C.G.); (R.R.)
| | - Camilla Guerini
- Anatomic Pathology Unit, Department of Molecular Medicine, University of Pavia and Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Lombardy, Italy; (G.A.); (O.G.); (C.G.); (R.R.)
| | - Roberta Riboni
- Anatomic Pathology Unit, Department of Molecular Medicine, University of Pavia and Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Lombardy, Italy; (G.A.); (O.G.); (C.G.); (R.R.)
| | - Luca Mastracci
- Pathology Unit, Department of Surgical and Diagnostic Sciences, University of Genoa and Ospedale Policlinico San Martino University Hospital, 16132 Genoa, Liguria, Italy; (F.G.); (L.M.)
| | - Antonio Di Sabatino
- Department of Internal Medicine, University of Pavia and Fondazione IRCCS San Matteo Hospital, 27100 Pavia, Lombardy, Italy;
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Lund-Andersen C, Torgunrud A, Fleten KG, Flatmark K. Omics analyses in peritoneal metastasis-utility in the management of peritoneal metastases from colorectal cancer and pseudomyxoma peritonei: a narrative review. J Gastrointest Oncol 2021; 12:S191-S203. [PMID: 33968437 DOI: 10.21037/jgo-20-136] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
High-throughput "-omics" analysis may provide a broader and deeper understanding of cancer biology to define prognostic and predictive biomarkers and identify novel therapy targets. In this review we provide an overview of studies where the peritoneal tumor component of peritoneal metastases from colorectal cancer (PM-CRC) and pseudomyxoma peritonei (PMP) were analyzed. Most of the available data was derived from DNA mutation analysis, but a brief review of findings from transcriptomic and protein expression analysis was also performed. Studies reporting genomic analysis of peritoneal tumor samples from 1,779 PM-CRC and 623 PMP cases were identified. The most frequently mutated genes in PM-CRC were KRAS, APC, SMAD4, BRAF, and PIK3CA, while in PMP KRAS, GNAS, FAT4, TGFBR1, TP53 and SMAD3/4 mutations were most commonly identified. Analyses were performed by single-gene analyses and to some extent targeted next-generation sequencing, and a very limited amount of broad explorative data exists. The investigated cohorts were typically small and heterogeneous with respect to the methods used and to the reporting of clinical data. This was even more apparent regarding transcriptomic and protein data, as the low number of cases examined and quality of clinical data would not support firm conclusions. Even for the most frequently mutated genes, the results varied greatly; for instance, KRAS mutations were reported at frequencies between 20-57% in PM-CRC and 38-100% in PMP. Such variation could be caused by random effects in small cohorts, heterogeneity in patient selection, or sensitivity of applied technology. Although a large number of samples have been subjected to analysis, cross-study comparisons are difficult to perform, and combined with small cohorts and varying quality and detail of clinical information, the observed variation precludes useful interpretation in a clinical context. Although omics data in theory could answer questions to aid management decisions in PM-CRC and PMP, the existing data does not presently support clinical implementation. With the necessary technologies being generally available, the main challenge will be to obtain sufficiently large, representative cohorts with adequate clinical data and standardized reporting of results. Importantly, studies where the focus is specifically on peritoneal disease are needed, where the study designs are aligned with clearly defined research questions to allow robust conclusions. Such studies are highly warranted if patients with PM-CRC and PMP are to derive benefit from recent advances in precision cancer medicine.
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Affiliation(s)
- Christin Lund-Andersen
- Department of Tumor Biology, Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.,Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Annette Torgunrud
- Department of Tumor Biology, Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
| | - Karianne Giller Fleten
- Department of Tumor Biology, Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.,Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Kjersti Flatmark
- Department of Tumor Biology, Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.,Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway.,Department of Gastroenterological Surgery, Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
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34
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Molecular profiling of appendiceal serrated lesions, polyps and mucinous neoplasms: a single-centre experience. J Cancer Res Clin Oncol 2021; 147:1897-1904. [PMID: 33712927 PMCID: PMC8164605 DOI: 10.1007/s00432-021-03589-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 03/07/2021] [Indexed: 12/17/2022]
Abstract
Purpose Non-neuroendocrine neoplasms of the appendix are a phenotypically heterogeneous group of lesions; a comprehensive molecular characterization of these tumors is still lacking. Methods A total of 52 samples taken from 49 patients was evaluated: 18 sessile serrated lesions (SSL; 3 with dysplasia), 2 high-grade tubular adenomas, 1 tubulo-villous adenoma,1 hyperplastic polyp, 18 low-grade appendiceal mucinous neoplasms (LAMN), 3 high-grade appendiceal mucinous neoplasms (HAMN) and 9 mucinous adenocarcinomas. Hotspot mutational profiling of the RNF43, SMAD4, KRAS, NRAS, BRAF and PIK3CA genes was performed. Expression of p53, MLH1, PMS2, MSH2, and MSH6 was evaluated by immunohistochemistry. Results KRAS was the most frequently mutated gene (53.9% of cases), followed by RNF43 (15.4%), and BRAF (13.5%). In particular: KRAS was mutated in 44.4% of adenocarcinomas, 66.7% of HAMNs, 61.1% of LAMNs, 53.3% of SSL without dysplasia and in 66.7% of SSL with dysplasia; RNF43 was mutated in 33.3% of adenocarcinomas, 66.7% of HAMNs, 11.1% of LAMNs and in 6.7% of SSL without dysplasia; BRAF was mutated in 11.1% of adenocarcinomas, 26.7% of SSL without dysplasia and in 5.6% of LAMNs. Only a case of high-grade tubular adenoma showed mismatch repair deficiency, while immunohistochemical expression of p53 was altered in 21.1% of cases. Conclusions The histological phenotypic similarities between appendicular mucinous lesions and serrated colon lesions do not reflect a similar genetic landscape. Mismatch repair deficiency is a rare event during appendiceal mucinous carcinogenesis.
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35
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Hoehn RS, Rieser CJ, Choudry MH, Melnitchouk N, Hechtman J, Bahary N. Current Management of Appendiceal Neoplasms. Am Soc Clin Oncol Educ Book 2021; 41:1-15. [PMID: 33770459 DOI: 10.1200/edbk_321009] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Appendiceal neoplasms include a heterogeneous group of epithelial and nonepithelial tumors that exhibit varying malignant potential. This review article summarizes current diagnostic criteria, classification systems, and optimal therapeutic strategies for the five main histopathologic subtypes of appendiceal neoplasms. In particular, the management of epithelial appendiceal neoplasms has evolved. Although their treatment has historically been extrapolated from colon cancer, improved understanding of their unique histopathologic and molecular characteristics and a growing body of published clinical data support a more nuanced approach to their management.
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Affiliation(s)
- Richard S Hoehn
- Division of Surgical Oncology, University of Pittsburgh Medical Center, Pittsburgh, PA
| | - Caroline J Rieser
- Division of Surgical Oncology, University of Pittsburgh Medical Center, Pittsburgh, PA
| | - M Haroon Choudry
- Division of Surgical Oncology, University of Pittsburgh Medical Center, Pittsburgh, PA
| | - Nelya Melnitchouk
- Division of Surgical Oncology, Brigham and Women's Hospital, Boston, MA
| | - Jaclyn Hechtman
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Nathan Bahary
- Division of Medical Oncology, University of Pittsburgh Medical Center, Pittsburgh, PA
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36
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Mikaeel RR, Young JP, Tapia Rico G, Hewett PJ, Hardingham JE, Uylaki W, Horsnell M, Price TJ. Immunohistochemistry features and molecular pathology of appendiceal neoplasms. Crit Rev Clin Lab Sci 2021; 58:369-384. [PMID: 33569997 DOI: 10.1080/10408363.2021.1881756] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Primary appendiceal neoplasms (ANs) comprise a heterogeneous group of tumors. The pathology and classification of ANs have been controversial, and thus, a new classification of these neoplasms was published in the World Health Organization (WHO) classification of tumors (5th edition, 2019). However, immunohistochemistry (IHC) features of epithelial ANs are not explained in this edition and the limited data on the molecular pathology of these tumors shows inconsistent findings in various studies. It would be useful to identify biomarkers appropriate for each subtype to better aid in treatment selection. Therefore, we reviewed the literature to investigate what is known of the molecular pathology and IHC features of the most frequently diagnosed pathological subtypes of epithelial ANs based on the recent classification. The inconsistencies in research findings regarding the IHC features and molecular pathology of ANs could be due to differences in the number of samples and their collection and preparation as well as to the lack of a universally accepted classification system for these neoplasms. However, the literature shows that epithelial ANs typically stain positive for MUC2, CK20, and CDX2 and that the expression of SATB2 protein could be used as a biomarker for appendix tumor origin. Low-grade appendiceal mucinous neoplasms tend to have mutations in KRAS and GNAS but are usually wild-type for BRAF, APC, and P53. Conversely, appendiceal adenocarcinomas are frequently found with mutations in KRAS, GNAS, P53, PIK3CA, and APC, and have significant nuclear expression of β-catenin, loss of nuclear or nuclear and cytoplasmic expression of SMAD4, and loss of cytoplasmic membranous expression of E-cadherin. Goblet cell carcinomas (GCCs) typically stain positive for keratin and mucin markers and are frequently mutated in P53 and chromatin-modifier genes, but they tend to be wild-type for KRAS, GNAS, APC, and PIK3CA. The expression of CK7 and SATB2 proteins is usually negative in appendiceal neuroendocrine neoplasms and they lack the mutations in common cancer-associated genes including APC, BRAF, SMAD4, and PIK3C. The available data suggest that GCCs have distinct molecular and immunohistochemical features and that they have characteristics more in common with adenocarcinoma than classical neuroendocrine tumors. In addition, MSI does not seem to have a role in the pathogenesis of epithelial ANs because they are rarely detected in these tumors. Finally, hereditary predisposition may have a role in the development of ANs because heterozygous CTNNβ1, NOTCH1, and NOTCH4 germline mutations have recently been identified in low and high grades ANs.
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Affiliation(s)
- Reger R Mikaeel
- Department of Haematology and Oncology, The Queen Elizabeth Hospital, Adelaide, Australia.,SAHMRI Colorectal Node, Basil Hetzel Institute, Woodville South, Australia.,Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, Australia.,Department of Biology, College of Science, University of Duhok, Duhok, Kurdistan
| | - Joanne P Young
- Department of Haematology and Oncology, The Queen Elizabeth Hospital, Adelaide, Australia.,SAHMRI Colorectal Node, Basil Hetzel Institute, Woodville South, Australia.,Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, Australia
| | - Gonzalo Tapia Rico
- Department of Medical Oncology, Royal Adelaide Hospital, Adelaide, Australia
| | - Peter J Hewett
- University of Adelaide Department of Surgery, The Queen Elizabeth Hospital, Adelaide, Australia
| | - Jennifer E Hardingham
- Department of Haematology and Oncology, The Queen Elizabeth Hospital, Adelaide, Australia.,SAHMRI Colorectal Node, Basil Hetzel Institute, Woodville South, Australia.,Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, Australia
| | - Wendy Uylaki
- Department of Haematology and Oncology, The Queen Elizabeth Hospital, Adelaide, Australia
| | - Mehgan Horsnell
- Department of Haematology and Oncology, The Queen Elizabeth Hospital, Adelaide, Australia
| | - Timothy J Price
- Department of Haematology and Oncology, The Queen Elizabeth Hospital, Adelaide, Australia.,Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, Australia
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Wang B, Yao J, Ma R, Liu D, Lu Y, Shi G, An L, Xia A, Chen F, Pang S, Zhai X, Liu G, Chen S, Xu M, Song L, Xu H. The mutational landscape and prognostic indicators of pseudomyxoma peritonei originating from the ovary. Int J Cancer 2021; 148:2036-2047. [PMID: 33403690 DOI: 10.1002/ijc.33460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 11/29/2020] [Accepted: 12/01/2020] [Indexed: 12/12/2022]
Abstract
Pseudomyxoma peritonei (PMP) is a rare disorder with unique pathological and genetic changes. Although several studies have reported the clinical features and mutational changes of PMP that originates from the appendix, few studies on PMP originating from the ovary have been reported due to its extreme rarity. In order to characterize the somatic mutational landscape and to investigate the prognosis predicting factors of ovary-originating PMP, we examined 830 cases of PMP and identified 16 patients with PMP that originated from the ovary. Whole-exome sequencing (WES) was performed on 12 cases using formalin-fixed, paraffin-embedded (FFPE) tissue samples. We found that 25% (3/12) of the patients carried mutations in cancer driver genes, including TP53, ATM and SETD2, and 16.7% (2/12) of the patients carried mutations in cancer driver genes, including ATRX, EP300, FGFR2, KRAS, NOCR1 and RB1. The MUC16 (58.33%), BSN (41.67%), PCNT (41.67%), PPP2R5A (41.67%), PRSS36 (41.67%), PTPRK (41.67%) and SBF1 (41.67%) genes presented the highest mutational frequencies. The PI3K-Akt signaling pathway, human papillomavirus infection pathway, cell skeleton, cell adhesion, and extracellular matrix and membrane proteins were the major pathways or functions that were affected. Patients were followed up to 174 months (median: 48.26 months). The 5-year OS rate for all patients was 71.2% and the median OS was not reached. PTPRK mutations, presurgical CA199 level, completeness of cytoreduction (CCR) and peritoneal cancer index (PCI) were identified as potential predictive factors for patient survival. In conclusion, the mutational landscape for ovary-originating PMP was revealed and exhibited unique features distinct from appendix-originating PMP. PTPRK, CA199, CCR and PCI may predict patient survival.
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Affiliation(s)
- Bing Wang
- Department of Myxoma, Aerospace Center Hospital, Beijing, China
| | - Jianfei Yao
- HaploX Biotechnology, Co., Ltd, Shenzhen, China
| | - Ruiqing Ma
- Department of Myxoma, Aerospace Center Hospital, Beijing, China
| | - Danni Liu
- HaploX Biotechnology, Co., Ltd, Shenzhen, China
| | - Yiyan Lu
- Department of Myxoma, Aerospace Center Hospital, Beijing, China
| | - Guanjun Shi
- Department of Myxoma, Aerospace Center Hospital, Beijing, China
| | - Lubiao An
- Department of Myxoma, Aerospace Center Hospital, Beijing, China
| | - Ao Xia
- Department of Myxoma, Aerospace Center Hospital, Beijing, China
| | - Feng Chen
- Department of Myxoma, Aerospace Center Hospital, Beijing, China
| | - Shaojun Pang
- Department of Myxoma, Aerospace Center Hospital, Beijing, China
| | - Xichao Zhai
- Department of Myxoma, Aerospace Center Hospital, Beijing, China
| | - Guifeng Liu
- HaploX Biotechnology, Co., Ltd, Shenzhen, China
| | - Shifu Chen
- HaploX Biotechnology, Co., Ltd, Shenzhen, China
| | - Mingyan Xu
- HaploX Biotechnology, Co., Ltd, Shenzhen, China
| | - Lele Song
- HaploX Biotechnology, Co., Ltd, Shenzhen, China.,Department of Radiotherapy, the Eighth Medical Center of the Chinese PLA General Hospital, Beijing, China
| | - Hongbin Xu
- Department of Myxoma, Aerospace Center Hospital, Beijing, China
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38
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King MC, Munoz‐Zuluaga C, Ledakis P, Studeman K, Sittig M, Gushchin V, Sardi A. Germline and somatic genetic alterations in two first-degree relatives with appendiceal low-grade mucinous carcinoma peritonei. Clin Case Rep 2020; 8:3168-3177. [PMID: 33363901 PMCID: PMC7752445 DOI: 10.1002/ccr3.3338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 07/21/2020] [Accepted: 08/12/2020] [Indexed: 11/06/2022] Open
Abstract
Comparing genetic mutations of first-degree relatives with appendiceal pseudomyxoma peritonei may explain clinical outcomes and disease pathogenesis. Molecular profiling of mucinous tumors may identify improved treatments to traditional chemotherapy.
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Affiliation(s)
| | | | | | | | - Michelle Sittig
- The Institute for Cancer CareMercy Medical CenterBaltimoreMDUSA
| | - Vadim Gushchin
- The Institute for Cancer CareMercy Medical CenterBaltimoreMDUSA
| | - Armando Sardi
- The Institute for Cancer CareMercy Medical CenterBaltimoreMDUSA
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39
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Holowatyj AN, Eng C, Wen W, Idrees K, Guo X. Spectrum of Somatic Cancer Gene Variations Among Adults With Appendiceal Cancer by Age at Disease Onset. JAMA Netw Open 2020; 3:e2028644. [PMID: 33295976 PMCID: PMC7726634 DOI: 10.1001/jamanetworkopen.2020.28644] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
IMPORTANCE The incidence of appendiceal cancer (AC) is rising, particularly among individuals younger than 50 years (early-onset AC), with unexplained etiologies. The unique spectrum of somatic cancer gene variations among patients with early-onset AC is largely undetermined. OBJECTIVE To characterize the frequency of somatic variations and genomic patterns among patients with early-onset (age <50 years) vs late-onset (age ≥50 years) AC. DESIGN, SETTING, AND PARTICIPANTS This cohort study included individuals aged 18 years and older diagnosed with pathologically verified AC. Cases with clinical-grade targeted sequencing data from January 1, 2011, to December 31, 2019, were identified from the international clinicogenomic data-sharing consortium American Association for Cancer Research Project Genomics Evidence Neoplasia Information Exchange (GENIE). Data analysis was conducted from May to September 2020. EXPOSURES Age at disease onset. MAIN OUTCOMES AND MEASURES Somatic variation prevalence and spectrum in AC patients was determined. Variation comparisons between early-onset and late-onset AC were evaluated using multivariable logistic regression with adjustment for sex, race/ethnicity, histological subtype, sequencing center, and sample type. RESULTS In total 385 individuals (mean [SD] age at diagnosis, 56.0 [12.4] years; 187 [48.6%] men; 306 [79.5%] non-Hispanic White individuals) with AC were included in this study, and 109 patients (28.3%) were diagnosed with early-onset AC. Race/ethnicity differed by age at disease onset; non-Hispanic Black individuals accounted for a larger proportion of early-onset vs late-onset cases (9 of 109 [8.3%] vs 11 of 276 [4.0%]; P = 0.04). Compared with patients aged 50 years or older at diagnosis, patients with early-onset AC had significantly higher odds of presenting with nonsilent variations in PIK3CA, SMAD3, and TSC2 (PIK3CA: odds ratio [OR], 4.58; 95% CI, 1.72-12.21; P = .002; SMAD3: OR, 7.37; 95% CI, 1.24-43.87; P = .03; TSC2: OR, 12.43; 95% CI, 1.03-149.59; P = .047). In contrast, patients with early-onset AC had a 60% decreased odds of presenting with GNAS nonsilent variations compared with patients with late-onset AC (OR, 0.40; 95% CI, 0.21-0.76, P = .006). By histological subtype, young patients with mucinous adenocarcinomas of the appendix had 65% decreased odds of variations in GNAS compared with late-onset cases in adjusted models (OR, 0.35; 95% CI, 0.15-0.79; P = .01). Similarly, patients with early-onset nonmucinous appendiceal adenocarcinomas had 72% decreased odds of presenting with GNAS variations vs late-onset cases, although these findings did not reach significance (OR, 0.28; 95% CI, 0.07-1.14; P = .08). GNAS and TP53 variations were mutually exclusive in ACs among early-onset and late-onset cases (P < .05). CONCLUSIONS AND RELEVANCE In the study, AC diagnosed among younger individuals harbored a distinct genomic landscape compared with AC diagnosed among older individuals. Development of therapeutic modalities that target these unique molecular features may yield clinical implications specifically for younger patients.
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Affiliation(s)
- Andreana N. Holowatyj
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Nashville, Tennessee
| | - Cathy Eng
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Nashville, Tennessee
| | - Wanqing Wen
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Kamran Idrees
- Vanderbilt-Ingram Cancer Center, Nashville, Tennessee
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Xingyi Guo
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt-Ingram Cancer Center, Nashville, Tennessee
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Calabrò ML, Lazzari N, Rigotto G, Tonello M, Sommariva A. Role of Epithelial-Mesenchymal Plasticity in Pseudomyxoma Peritonei: Implications for Locoregional Treatments. Int J Mol Sci 2020; 21:ijms21239120. [PMID: 33266161 PMCID: PMC7731245 DOI: 10.3390/ijms21239120] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/25/2020] [Accepted: 11/28/2020] [Indexed: 12/14/2022] Open
Abstract
The mechanisms by which neoplastic cells disseminate from the primary tumor to metastatic sites, so-called metastatic organotropism, remain poorly understood. Epithelial-mesenchymal transition (EMT) plays a role in cancer development and progression by converting static epithelial cells into the migratory and microenvironment-interacting mesenchymal cells, and by the modulation of chemoresistance and stemness of tumor cells. Several findings highlight that pathways involved in EMT and its reverse process (mesenchymal-epithelial transition, MET), now collectively called epithelial-mesenchymal plasticity (EMP), play a role in peritoneal metastases. So far, the relevance of factors linked to EMP in a unique peritoneal malignancy such as pseudomyxoma peritonei (PMP) has not been fully elucidated. In this review, we focus on the role of epithelial-mesenchymal dynamics in the metastatic process involving mucinous neoplastic dissemination in the peritoneum. In particular, we discuss the role of expression profiles and phenotypic transitions found in PMP in light of the recent concept of EMP. A better understanding of EMP-associated mechanisms driving peritoneal metastasis will help to provide a more targeted approach for PMP patients selected for locoregional interventions involving cytoreductive surgery and hyperthermic intraperitoneal chemotherapy.
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Affiliation(s)
- Maria Luisa Calabrò
- Immunology and Molecular Oncology, Veneto Institute of Oncology IOV-IRCCS, I-35128 Padua, Italy; (N.L.); (G.R.)
- Correspondence:
| | - Nayana Lazzari
- Immunology and Molecular Oncology, Veneto Institute of Oncology IOV-IRCCS, I-35128 Padua, Italy; (N.L.); (G.R.)
| | - Giulia Rigotto
- Immunology and Molecular Oncology, Veneto Institute of Oncology IOV-IRCCS, I-35128 Padua, Italy; (N.L.); (G.R.)
| | - Marco Tonello
- Surgical Oncology of the Esophagus and Digestive Tract, Veneto Institute of Oncology IOV-IRCCS, I-35128 Padua, Italy;
| | - Antonio Sommariva
- Advanced Surgical Oncology, Surgical Oncology of the Esophagus and Digestive Tract, Veneto Institute of Oncology IOV-IRCCS, I-35128 Padua, Italy;
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Nonaka S, Hashimoto T, Oda I, Sekine S. Sporadic pyloric gland adenoma associated with a large fundic gland polyp: genetic evidence for stepwise progression. Gastric Cancer 2020; 23:1102-1106. [PMID: 32415517 DOI: 10.1007/s10120-020-01082-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 05/03/2020] [Indexed: 02/07/2023]
Abstract
Pyloric gland adenoma (PGA) is an uncommon variant of gastric adenoma exhibiting pyloric gland/mucous neck cell differentiation. We present a sporadic PGA associated with a large fundic gland polyp (FGP) in a woman in her 40 s without Helicobacter pylori infection. The polyp, measuring 25 mm in size, was located in the middle gastric body and was removed by endoscopic submucosal dissection. Histological examination revealed three morphologically distinct components: FGP, FGP with large cysts, and PGA. A genetic analysis identified a truncating APC mutation in all the three components, supporting their histogenetic relationship. Additionally, a GNAS mutation was detected in two components, FGP with large cysts and PGA, whereas a KRAS mutation was exclusively found in the PGA component. Thus, despite the unusual presentation, the PGA component harbored prototypical genetic alterations. The differential genetic alterations observed in the three components imply that they represent stepwise progression from FGP to PGA.
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Affiliation(s)
- Satoru Nonaka
- Endoscopy Division, National Cancer Center Hospital, 5-1-1, Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - Taiki Hashimoto
- Division of Diagnostic Pathology, National Cancer Center Hospital, 5-1-1, Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - Ichiro Oda
- Endoscopy Division, National Cancer Center Hospital, 5-1-1, Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - Shigeki Sekine
- Division of Diagnostic Pathology, National Cancer Center Hospital, 5-1-1, Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan. .,Division of Molecular Pathology, National Cancer Center Research Institute, 5-1-1, Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan.
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Raghav K, Shen JP, Jácome AA, Guerra JL, Scally CP, Taggart MW, Foo WC, Matamoros A, Shaw KR, Fournier K, Overman MJ, Eng C. Integrated clinico-molecular profiling of appendiceal adenocarcinoma reveals a unique grade-driven entity distinct from colorectal cancer. Br J Cancer 2020; 123:1262-1270. [PMID: 32733093 PMCID: PMC7553941 DOI: 10.1038/s41416-020-1015-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 06/29/2020] [Accepted: 07/16/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Appendiceal adenocarcinoma (AA) is an orphan disease with unique clinical attributes but often treated as colorectal cancer (CRC). Understanding key molecular differences between AA and CRC is critical. METHODS We performed retrospective analyses of AA patients (N = 266) with tumour and/or blood next-generation sequencing (NGS) (2013-2018) with in-depth clinicopathological annotation. Overall survival (OS) was examined. For comparison, CRC cohorts annotated for sidedness, consensus molecular subtypes (CMS) and mutations (N = 3283) were used. RESULTS Blood-NGS identified less RAS/GNAS mutations compared to tissue-NGS (4.2% vs. 60.9%, P < 0.0001) and showed poor concordance with tissue for well-/moderately differentiated tumours. RAS (56.2%), GNAS (28.1%) and TP53 (26.9%) were most frequent mutations. Well/moderately differentiated tumours harboured more RAS (69.2%/64.0% vs. 40.5%) and GNAS (48.7%/32.0% vs. 10.1%) while moderate/poorly differentiated tumours had more TP53 (26.0%/27.8% vs. 7.7%) mutations. Appendiceal adenocarcinoma (compared to CRC) harboured significantly fewer APC (9.1% vs. 55.4%) and TP53 (26.9% vs. 67.5%) and more GNAS mutations (28.1% vs. 2.0%) (P < 0.0001). Appendiceal adenocarcinoma mutation profile did not resemble either right-sided CRC or any of the four CMS in CRC. High grade, but no mutation, was independently predictive of survival. CONCLUSION Integrated clinico-molecular profiling of AA identified key molecular drivers distinct from CRC. Appendiceal adenocarcinoma has a predominantly grade-driven biology that trumps mutations.
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Affiliation(s)
- Kanwal Raghav
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
| | - John P Shen
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Alexandre A Jácome
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jennifer L Guerra
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Christopher P Scally
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Melissa W Taggart
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Wai C Foo
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Aurelio Matamoros
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Kenna R Shaw
- Institute for Personalized Cancer Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Keith Fournier
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Michael J Overman
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Cathy Eng
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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Yanai Y, Saito T, Hayashi T, Akazawa Y, Yatagai N, Tsuyama S, Tomita S, Hirai S, Ogura K, Matsumoto T, Wada R, Yao T. Molecular and clinicopathological features of appendiceal mucinous neoplasms. Virchows Arch 2020; 478:413-426. [PMID: 32821969 DOI: 10.1007/s00428-020-02906-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 07/27/2020] [Accepted: 08/10/2020] [Indexed: 12/14/2022]
Abstract
Appendiceal mucinous tumors (AMTs) include low-grade mucinous appendiceal neoplasms (LAMNs), high-grade mucinous appendiceal neoplasms (HAMNs), and mucinous adenocarcinomas (MACs). We collected 51 AMT samples (LAMN: 34, HAMN: 8, MAC: 9). Three of the eight HAMN cases contained LAMN components, and four out of nine MAC cases contained LAMN and/or HAMN components within the tumor. A next-generation sequencing (NGS) cancer hotspot panel was used to analyze 11 pure LAMN, 4 HAMN, and 3 MAC cases. The results revealed KRAS and GNAS as the most frequently mutated genes. Sanger sequencing was then performed to detect KRAS, GNAS, and TP53 mutations in the remaining 31 cases and RNF43 mutations in all cases. KRAS/GNAS and TP53 mutations occurred exclusively in pure LAMNs; however, five LAMN cases had mutations in both KRAS and GNAS. RNF43 mutations almost exclusively occurred with KRAS/GNAS mutations in pure LAMNs. In MAC and HAMN, KRAS/GNAS mutation status was nearly preserved between lower-grade areas. Most of the detected RNF43 mutations was missense type. RNF43 mutations were detected in both components of MAC with lower-grade area; however, RNF43 mutations detected in these two lesions were entirely different. RNF43 mutations were detected in only one of the eight HAMN patients, which was the sole case without pseudomyxoma peritonei (PMP). None of the four MAC patients with RNF43 mutation showed PMP. These findings suggest that RNF43 mutations occur at a later stage of MAC development and do not associate with PMP. Furthermore, a gradual transition from LAMN to MAC via HAMN could be considered.
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Affiliation(s)
- Yuka Yanai
- Department of Human Pathology, Graduate School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Tsuyoshi Saito
- Department of Human Pathology, Graduate School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan. .,Intractable Disease Research Center, Graduate School of Medicine, Juntendo University, Tokyo, 113-8421, Japan.
| | - Takuo Hayashi
- Department of Human Pathology, Graduate School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Yoichi Akazawa
- Department of Gastroenterology, Graduate School of Medicine, Juntendo University, Tokyo, 113-8421, Japan
| | - Noboru Yatagai
- Department of Gastroenterology, Graduate School of Medicine, Juntendo University, Tokyo, 113-8421, Japan
| | - Sho Tsuyama
- Department of Human Pathology, Graduate School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Shigeki Tomita
- Department of Pathology, Juntendo University Urayasu Hospital, Urayasu, Chiba, 279-0021, Japan
| | - Shu Hirai
- Department of Pathology, Juntendo University Tokyo Koto Geriatric Medical center, Tokyo, 136-0075, Japan
| | - Kanako Ogura
- Department of Pathology, Juntendo University Nerima Hospital, Tokyo, 177-8521, Japan
| | - Toshiharu Matsumoto
- Department of Pathology, Juntendo University Nerima Hospital, Tokyo, 177-8521, Japan
| | - Ryo Wada
- Department of Pathology, Juntendo University Shizuoka Hospital, Shizuoka, 410-2295, Japan
| | - Takashi Yao
- Department of Human Pathology, Graduate School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
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Lin YL, Ma R, Li Y. The biological basis and function of GNAS mutation in pseudomyxoma peritonei: a review. J Cancer Res Clin Oncol 2020; 146:2179-2188. [PMID: 32700107 PMCID: PMC7382651 DOI: 10.1007/s00432-020-03321-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 07/10/2020] [Indexed: 12/16/2022]
Abstract
Purpose Pseudomyxoma peritonei (PMP) is a rare clinical malignancy syndrome characterized by the uncontrollable accumulation of copious mucinous ascites in the peritoneal cavity, resulting in “jelly belly”. The mechanism of tumor progression and mucin hypersecretion remains largely unknown, but GNAS mutation is a promising contributor. This review is to systemically summarize the biological background and variant features of GNAS, as well as the impacts of GNAS mutations on mucin expression, tumor cell proliferation, clinical-pathological characteristics, and prognosis of PMP. Methods NCBI PubMed database (in English) and WAN FANG DATA (in Chinese) were used for literature search. And NCBI Gene and Protein databases, Ensembl Genome Browser, COSMIC, UniProt, and RCSB PDB database were used for gene and protein review. Results GNAS encodes guanine nucleotide-binding protein α subunit (Gsα). The mutation sites of GNAS mutation in PMP are relatively stable, usually at Chr20: 57,484,420 (base pair: C-G) and Chr20: 57,484,421 (base pair: G-C). Typical GNAS mutation results in the reduction of GTP enzyme activity in Gsα, causing failure to hydrolyze GTP and release phosphoric acid, and eventually the continuous binding of GTP to Gsα. The activated Gsα could thus continuously promote mucin secretion through stimulating the cAMP-PKA signaling pathway, which is a possible mechanism leading to elevated mucin secretion in PMP. Conclusion GNAS mutation is one of the most important molecular biological features in PMP, with major functions to promote mucin hypersecretion.
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Affiliation(s)
- Yu-Lin Lin
- Department of Peritoneal Cancer Surgery and Pathology, Beijing Shijitan Hospital, Capital Medical University, No. 10 Tieyi Road, Yangfangdian Street, Haidian District, Beijing, 100038, China
| | - Ru Ma
- Department of Peritoneal Cancer Surgery and Pathology, Beijing Shijitan Hospital, Capital Medical University, No. 10 Tieyi Road, Yangfangdian Street, Haidian District, Beijing, 100038, China
| | - Yan Li
- Department of Peritoneal Cancer Surgery and Pathology, Beijing Shijitan Hospital, Capital Medical University, No. 10 Tieyi Road, Yangfangdian Street, Haidian District, Beijing, 100038, China.
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Foster JM, Patel A, Zhang C, Shostrom V, Brown K, Cushman-Vokoun AM. Investigating the utility of extended mutation analysis in gastrointestinal peritoneal metastasis. J Surg Oncol 2020; 122:1106-1113. [PMID: 32662065 DOI: 10.1002/jso.26114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 06/28/2020] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND OBJECTIVES Outcomes for gastrointestinal peritoneal metastases (GI-PM) are worse compared to systemic metastases, with a paucity of data exploring extended mutation profiling. An exploratory mutation analysis in GI-PMs was performed as a "proof of concept" of potential predictive values of profiling in GI-PM and rates of actionable mutations. METHODS The study included 40 GI-PM patients: 14 low-grade mucinous carcinoma peritonei and 26 HG-PM (12 colons, 10 appendix, 4 small bowels). Demographics, histologies, peritoneal cancer indexes, cytoreduction scores, and survival data were collected. NGS 50-gene mutation profiling was performed on 38 specimens. The association of mutations with survival was evaluated in high-grade PM. RESULTS KRAS, TP53, and SMAD4 mutations were observed in 61%, 29%, and 8% of cases across all tumor histologies. In 66% cases >1 mutations occurred, associated with decreased survival in HG-PM: 32 vs 73 months, P = .03. TP53 or SMAD4 mutations were associated with decreased survival in HG-PM: 22 vs 48 months, P = .02. Actionable mutations were detected in 70%. CONCLUSION Actionable mutations were detected at high rates. GI-PMs have similar mutational profiles and TP53, SMAD4, and/or >1 mutation were associate with decreased survival in HG-PM. This data supports the concept of the extended mutation profiling utility in GI-PM warranting further investigation.
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Affiliation(s)
- Jason M Foster
- Department of Surgery, Division of Surgical Oncology, University of Nebraska Medical Center, Omaha, Nebraska
| | - Asish Patel
- Department of Surgery, Division of Surgical Oncology, University of Nebraska Medical Center, Omaha, Nebraska
| | - Chunmeng Zhang
- Department of Surgery, Division of Surgical Oncology, University of Nebraska Medical Center, Omaha, Nebraska
| | - Valerie Shostrom
- Department of Biostatistics, University of Nebraska Medical Center, Omaha, Nebraska
| | - Krista Brown
- Department of Surgery, Division of Surgical Oncology, University of Nebraska Medical Center, Omaha, Nebraska
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Fadaka AO, Bakare OO, Pretorius A, Klein A. Genomic profiling of microRNA target genes in colorectal cancer. Tumour Biol 2020; 42:1010428320933512. [PMID: 32552466 DOI: 10.1177/1010428320933512] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Colorectal cancer is the second and third most common cancer in men and women, respectively, worldwide. Alterations such as genetic and epigenetic are common in colorectal cancer and are the basis of tumor formation. The exploration of the molecular basis of colorectal cancer can drive a better understanding of the disease as well as guide the prognosis, therapeutics, and disease management. This study is aimed at investigating the genetic mutation profile of five candidate microRNAs (hsa-miR-513b-3p, hsa-miR-500b-3p, hsa-miR-500a-3p, hsa-miR-450b-3p, hsa-miR-193a-5p) targeted by seven genes (APC, KRAS, TCF7L2, EGFR, IGF1R, CASP8, and GNAS)) using in silico approaches. Two datasets (dataset 1 from our previous study and dataset two (The Cancer Genome Atlas, Nature 2012) were considered for this study. Protein-protein interaction, expression analysis, and genetic profiling were carried out using STRING, FireBrowse, and cBioPortal, respectively. Protein-protein interaction network showed that epidermal growth factor receptor has the highest connection among the target genes and this can be considered as the hub gene. Relative to other solid tumors, in colorectal cancer, six of the target genes were downregulated and only CASP8 was upregulated. Genes with protein tyrosine kinases domain were frequently altered in colorectal cancer and the most common alteration in these genes/domain are missense mutation. These results could serve as a lead in the identification of driver genes responsible for colorectal cancer initiation and progression. However, the intense mechanism of these results remains unclear and further experimental validation and molecular approaches are the focal points in the nearest future.
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Affiliation(s)
- Adewale Oluwaseun Fadaka
- Department of Science and Technology/Mintek Nanotechnology Innovation Centre, Biolabels Node, Department of Biotechnology, Faculty of Natural Sciences, University of the Western Cape, Bellville, South Africa.,Bioinformatics Research Group, Department of Biotechnology, Faculty of Natural Sciences, University of the Western Cape, Bellville, South Africa
| | - Olalekan Olanrewaju Bakare
- Bioinformatics Research Group, Department of Biotechnology, Faculty of Natural Sciences, University of the Western Cape, Bellville, South Africa
| | - Ashley Pretorius
- Bioinformatics Research Group, Department of Biotechnology, Faculty of Natural Sciences, University of the Western Cape, Bellville, South Africa
| | - Ashwil Klein
- Plant Omics Group, Department of Biotechnology, Faculty of Natural Sciences, University of the Western Cape, Bellville, South Africa
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Improved Outcome Prediction for Appendiceal Pseudomyxoma Peritonei by Integration of Cancer Cell and Stromal Transcriptional Profiles. Cancers (Basel) 2020; 12:cancers12061495. [PMID: 32521738 PMCID: PMC7352410 DOI: 10.3390/cancers12061495] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 05/29/2020] [Accepted: 06/03/2020] [Indexed: 12/19/2022] Open
Abstract
In recent years, cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC) have substantially improved the clinical outcome of pseudomyxoma peritonei (PMP) originating from mucinous appendiceal cancer. However, current histopathological grading of appendiceal PMP frequently fails in predicting disease outcome. We recently observed that the integration of cancer cell transcriptional traits with those of cancer-associated fibroblasts (CAFs) improves prognostic prediction for tumors of the large intestine. We therefore generated global expression profiles on a consecutive series of 24 PMP patients treated with CRS plus HIPEC. Multiple lesions were profiled for nine patients. We then used expression data to stratify the samples by a previously published “high-risk appendiceal cancer” (HRAC) signature and by a CAF signature that we previously developed for colorectal cancer, or by a combination of both. The prognostic value of the HRAC signature was confirmed in our cohort and further improved by integration of the CAF signature. Classification of cases profiled for multiple lesions revealed the existence of outlier samples and highlighted the need of profiling multiple PMP lesions to select representative samples for optimal performances. The integrated predictor was subsequently validated in an independent PMP cohort. These results provide new insights into PMP biology, revealing a previously unrecognized prognostic role of the stromal component and supporting integration of standard pathological grade with the HRAC and CAF transcriptional signatures to better predict disease outcome.
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Low grade appendiceal mucinous neoplasm mimicking an ovarian cyst: A case report. Int J Surg Case Rep 2020; 70:145-148. [PMID: 32422578 PMCID: PMC7229422 DOI: 10.1016/j.ijscr.2020.04.074] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 04/19/2020] [Accepted: 04/22/2020] [Indexed: 02/08/2023] Open
Abstract
Appendiceal mucocele defines as an intraluminal dilation of the appendix in response to mucin accumulation. This condition overall is very rare with a 0.2–0.3% incidence of all appendectomy specimens. It's more common in the females with a 4 to 1 ratio. Appropriate diagnosis and management of appendiceal mucocele prevent complications such as pseudomyxoma peritonei.
Introduction Appendiceal mucocele (AM) is a very rare neoplasm with an incidence of 0.2–0.3% of all appendectomy specimens. AM usually defined as an intraluminal dilation of the appendix in response to mucin accumulation. The preoperative diagnosis is difficult and can be misdiagnosed to any of the other differential diagnosis especially in female patients. If it is suspected, imaging modalities and colonoscopy can be helpful as a guide for the right surgical approach. Presentation of case A 41-year-old lady who found to have an appendicular tumor discovered incidentally on magnetic resonance imaging (MRI) of the abdomen during a follow-up in the referral hospital for persistent right lower quadrant abdominal pain with enlarging right ovarian cyst for 2 years. MRI revealed a sizeable cyst measuring 7 × 4 × 3 cm in the right iliac fossa (RIF) region with high suspicion of an AM. The patient was managed with open right limited hemicolectomy. The patient was diagnosed as a well-differentiated low-grade AM neoplasm with stage 0 (pTis, pN0, M0) based on the 8th edition of the American Joint Committee on Cancer (AJCC) Staging System. The patient had an uneventful recovery and advised for regular follow-up of at least 5 years. Discussion AM is a very rare neoplasm. The imaging modalities that can be diagnostic methods are the abdominal ultrasonography (US), transvaginal US, abdominal computed tomography (CT) and abdominal MRI. Fine needle aspiration must be avoided as the risk of perforation is high that will lead to dissemination of the mucinous material causing a serious complication called pseudomyxoma peritonei. Laparotomy is superior on laparoscopy as the risk of perforation is lower in laparotomy. Conclusion The presentation of AM is usually not specific, because of its anatomic position. Physicians should consider it in the differential diagnosis of persistent enlarging ovarian cyst or adnexal mass.
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Post-inflammatory mucosal hyperplasia and appendiceal diverticula simulate features of low-grade appendiceal mucinous neoplasms. Mod Pathol 2020; 33:953-961. [PMID: 31857681 DOI: 10.1038/s41379-019-0435-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 11/13/2019] [Accepted: 11/17/2019] [Indexed: 12/26/2022]
Abstract
Post-inflammatory mucosal hyperplasia and appendiceal diverticulosis simulate mucinous neoplasms, causing diagnostic confusion. Distinction between neoplasia and its mimics is particularly important since many authorities now consider all appendiceal mucinous neoplasms to be potentially malignant. The purpose of this study was to identify clinicopathologic and molecular features that may distinguish appendiceal mucinous neoplasms from non-neoplastic mimics. We retrospectively identified 92 mucinous lesions confined to the right lower quadrant, including 55 non-neoplastic examples of mucosal hyperplasia and/or diverticulosis and 37 low-grade neoplasms. Presenting symptoms, radiographic findings, appendiceal diameter, appearances of the lamina propria, non-neoplastic crypts, and epithelium, as well as mural changes were recorded. Twenty non-neoplastic lesions were subjected to KRAS mutational testing. Non-neoplastic appendices were smaller (p < 0.05) and more likely to present with symptoms of appendicitis (p < 0.05) than neoplasms. While post-inflammatory mucosal hyperplasia and diverticula often showed goblet cell-rich epithelium, extruded mucin pools, and patchy mural alterations with fibrosis, they always contained non-neoplastic crypts lined by mixed epithelial cell types and separated by lamina propria with predominantly preserved wall architecture. On the other hand, mucinous neoplasms lacked normal crypts (p < 0.05) and showed decreased lamina propria (p < 0.05) with diffusely thickened muscularis mucosae and lymphoid atrophy. Six (30%) non-neoplastic lesions contained KRAS mutations, particularly those containing goblet cell-rich hyperplastic epithelium. We conclude that distinction between neoplastic and non-neoplastic mucinous appendiceal lesions requires recognition of key morphologic features; KRAS mutational testing is an unreliable biomarker that cannot be used to assess biologic risk or confirm a diagnosis of neoplasia.
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Tirosh A, Jin DX, De Marco L, Laitman Y, Friedman E. Activating genomic alterations in the Gs alpha gene (GNAS) in 274 694 tumors. Genes Chromosomes Cancer 2020; 59:503-516. [PMID: 32337806 DOI: 10.1002/gcc.22854] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 04/16/2020] [Accepted: 04/20/2020] [Indexed: 01/07/2023] Open
Abstract
Activating point mutations in two codons (R201 and Q227) in the alpha subunit of the stimulatory GTP binding protein (GNAS) gene-coined gsp mutations-were originally reported in growth hormone secreting pituitary adenomas. In these tumor types, gsp activating mutations were associated with uncontrolled intracellular cAMP accumulation leading to cellular proliferation and tumor formation. Since the original description of gsp mutations in pituitary and later thyroid neoplasia, many more tumors were genotyped for these specific activating mutations. In this paradigm, GNAS is an oncogene that can be activated by other molecular mechanisms, such as DNA amplification and translocation. Herein, we describe the largest account to date of tumor types that harbor pathogenic GNAS genomic alterations (GAs) including the "classical" gsp activating point mutations, delineate some common features of these tumors, and speculate as to the possible mechanisms whereby GNAS activating GAs are associated with the various stages of tumorigenesis.
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Affiliation(s)
- Amit Tirosh
- Endocrinology Institute, Tel-Aviv, Israel.,Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Dexter X Jin
- Cancer Genomics, Foundation Medicine, Inc, Cambridge, Massachusetts, USA
| | - Luiz De Marco
- Department of Surgery, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Yael Laitman
- Oncogenetics Unit, Chaim Sheba Medical Center, Tel-Aviv, Israel
| | - Eitan Friedman
- Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel.,Oncogenetics Unit, Chaim Sheba Medical Center, Tel-Aviv, Israel
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