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Nofi CP, Roberts BK, Rich BS, Glick RD. Pediatric, Adolescent and Young Adult (AYA) Peritoneal and Pleural Mesothelioma: A National Cancer Database Review. J Pediatr Surg 2024; 59:1113-1120. [PMID: 38418273 DOI: 10.1016/j.jpedsurg.2024.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 01/11/2024] [Accepted: 02/02/2024] [Indexed: 03/01/2024]
Abstract
PURPOSE Malignant peritoneal and pleural mesothelioma are rare in young patients, with a paucity of data regarding clinical characteristics and outcomes. We aimed to describe the clinical characteristics, treatment strategies, and outcomes for pediatric and adolescent/young adult (AYA) patients. METHODS The National Cancer Database (NCDB) was queried for malignant peritoneal and pleural mesothelioma in pediatric and AYA patients (ages 0-39) from 2004 to 2019. Stratification was performed for pediatric (age 0-21) and young adult (age 22-39) patients. Chi-squared, multivariable cox regression, and Kaplan-Meier analyses were performed. RESULTS We identified 570 total patients, 46 pediatric and 524 young adult, with mesothelioma (363 peritoneal and 207 pleural). There were significant differences in sex distribution as patients with peritoneal mesothelioma were more frequently female (63.1%). Patients with peritoneal mesothelioma were more likely to have radical surgery compared to pleural mesothelioma (56.7% v. 24.6%, respectively). A majority of patients with peritoneal and pleural mesothelioma received chemotherapy (66.4% and 61.4%, respectively). For peritoneal mesothelioma, surgical resection was associated with improved overall survival, whereas male sex, neoadjuvant chemotherapy, and radiation were associated with worse overall survival. For pleural mesothelioma, intraoperative chemotherapy was associated with improved overall survival, whereas Black race was associated with worse overall survival. Mean overall survival was greater for patients with peritoneal mesothelioma (125 months) compared to those with pleural mesothelioma (69 months), which remained significant after stratification of pediatric and young adult patients. CONCLUSION By analyzing a large cohort of pediatric and AYA mesothelioma, this study highlights clinical, prognostic, and survival differences between peritoneal and pleural disease. LEVEL OF EVIDENCE Level III. TYPE OF STUDY Retrospective.
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Affiliation(s)
- Colleen P Nofi
- Cohen Children's Medical Center, Division of Pediatric General, Thoracic, and Endoscopic Surgery, 269-01 76th Avenue Queens New Hyde Park, NY 11040, USA.
| | - Bailey K Roberts
- Cohen Children's Medical Center, Division of Pediatric General, Thoracic, and Endoscopic Surgery, 269-01 76th Avenue Queens New Hyde Park, NY 11040, USA
| | - Barrie S Rich
- Cohen Children's Medical Center, Division of Pediatric General, Thoracic, and Endoscopic Surgery, 269-01 76th Avenue Queens New Hyde Park, NY 11040, USA; Zucker School of Medicine at Hofstra/Northwell 500 Hofstra Boulevard Hempstead, Hempstead, NY 11548, USA
| | - Richard D Glick
- Cohen Children's Medical Center, Division of Pediatric General, Thoracic, and Endoscopic Surgery, 269-01 76th Avenue Queens New Hyde Park, NY 11040, USA; Zucker School of Medicine at Hofstra/Northwell 500 Hofstra Boulevard Hempstead, Hempstead, NY 11548, USA
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2
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Piggott LM, Hayes C, Greene J, Fitzgerald DB. Malignant pleural disease. Breathe (Sheff) 2023; 19:230145. [PMID: 38351947 PMCID: PMC10862126 DOI: 10.1183/20734735.0145-2023] [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: 08/15/2023] [Accepted: 01/02/2024] [Indexed: 02/16/2024] Open
Abstract
Malignant pleural disease represents a growing healthcare burden. Malignant pleural effusion affects approximately 1 million people globally per year, causes disabling breathlessness and indicates a shortened life expectancy. Timely diagnosis is imperative to relieve symptoms and optimise quality of life, and should give consideration to individual patient factors. This review aims to provide an overview of epidemiology, pathogenesis and suggested diagnostic pathways in malignant pleural disease, to outline management options for malignant pleural effusion and malignant pleural mesothelioma, highlighting the need for a holistic approach, and to discuss potential challenges including non-expandable lung and septated effusions.
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Affiliation(s)
- Laura M. Piggott
- Department of Respiratory Medicine, Tallaght University Hospital, Dublin, Ireland
- Department of Respiratory Medicine, St. James's Hospital, Dublin, Ireland
- These authors contributed equally
| | - Conor Hayes
- Department of Respiratory Medicine, Tallaght University Hospital, Dublin, Ireland
- Department of Respiratory Medicine, St. James's Hospital, Dublin, Ireland
- These authors contributed equally
| | - John Greene
- Department of Oncology, Tallaght University Hospital, Dublin, Ireland
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Michael CW, Bedrossian CCWM, Sadri N, Klebe S. The cytological features of effusions with mesothelioma in situ: A report of 9 cases. Diagn Cytopathol 2023; 51:374-388. [PMID: 36942732 DOI: 10.1002/dc.25129] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 02/16/2023] [Accepted: 03/03/2023] [Indexed: 03/23/2023]
Abstract
INTRODUCTION The diagnosis of mesothelioma in situ (MIS) is now accepted by the WHO as a pre-invasive neoplastic mesothelial proliferation and considered a diagnosis based on histologic evaluation only. Although the definition of MIS includes recurrent effusions, little is known about the cytologic features of such effusions. Since mesothelioma is usually diagnosed at an advanced stage and has a poor prognosis, early detection of a neoplastic mesothelial population in such effusions can potentially have a positive impact on the management of such a dire disease. MATERIALS AND METHODS We reviewed a total of 18 pleural effusions from nine patients with recurrent effusions. Of these, five patients had follow-up biopsies diagnosed as MIS and the remaining four cases had negative radiology and malignant cytology proven by molecular markers (BAP1, MTAP or CDKN2A deletion) and at least 1 year follow-up with no overt mass identified by radiology. RESULTS Initial effusions may mimic reactive mesothelial hyperplasia or exhibit atypia. As effusions recur, the cellularity and atypia increase and the mesothelial proliferation becomes morphologically indistinguishable from mesothelioma. Molecular alterations diagnostic of mesothelioma can be detected in these effusions, even in the initial-benign/reactive appearing ones. The cellularity and atypia detected in such effusions surpassed those noted on the biopsies, raising questions regarding the cause of such discrepancy. CONCLUSION The diagnosis of MIS can be suspected based on malignant effusion cytology supported by molecular alterations. We propose that the proliferation of neoplastic mesothelial clones represent a clinically silent "liquid phase MIS stage" corresponding to in situ stage in other organs.
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Affiliation(s)
- Claire W Michael
- Department of Pathology, University Hospitals Cleveland Medical Center/Case Western Reserve University, USA
| | | | - Navid Sadri
- Department of Molecular Diagnostics, University Hospitals Cleveland Medical Center, Case Western Reserve University, Cleveland, Ohio, USA
| | - Sonja Klebe
- Department of Pathology, Flinders University and SA Pathology, Adelaide, South Australia, Australia
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Michael CW. The cytologic diagnosis of mesothelioma: are we there yet? J Am Soc Cytopathol 2023; 12:89-104. [PMID: 36702736 DOI: 10.1016/j.jasc.2022.12.001] [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: 10/10/2022] [Revised: 12/01/2022] [Accepted: 12/20/2022] [Indexed: 12/28/2022]
Abstract
INTRODUCTION Mesothelioma is a rare but highly aggressive malignancy with poor prognosis that frequently present with recurrent effusions. Establishing the diagnosis by cytology can lead to early diagnosis and treatment and consequently improve prognosis. MATERIALS AND METHODS This review examines the cytological diagnosis of mesothelioma in the context of its historical and morphologic evolution and provides an update of the current reporting systems. Clues to identify the mesothelial and malignant nature of the sample are detailed as well as the supporting ancillary tests. RESULTS Cytologically, the samples are overwhelmingly cellular and malignancy is recognized by both architectural and cytological atypia. Numerous variably sized clusters and enlarged cells are easily identified, some with papillary architecture and collagen cores. Recognizing the mesothelial nature of the cells and supportive immunostains are essential to rule out the differential diagnosis of metastatic carcinomas and reactive mesothelium. Current ancillary tests such as homozygous deletion of CDKN2A, loss of BRCA1-associated protein, and methylthioadenosine phosphorylase expression can provide further support of malignancy. CONCLUSIONS At this time with the aid of current ancillary tests and in the hands of cytopathologists with adequate experience with the interpretation of effusions, the diagnosis of mesothelioma can be established with accuracy in most cases.
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Affiliation(s)
- Claire W Michael
- Department of Pathology, Case Western Reserve University/University Hospitals Cleveland Medical Center, Cleveland, Ohio.
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Ma GY, Shi S, Sang YZ, Wang P, Zhang ZG. High Expression of SMO and GLI1 Genes with Poor Prognosis in Malignant Mesothelioma. BIOMED RESEARCH INTERNATIONAL 2023; 2023:6575194. [PMID: 37139482 PMCID: PMC10151145 DOI: 10.1155/2023/6575194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 01/10/2023] [Accepted: 02/07/2023] [Indexed: 05/05/2023]
Abstract
Background To investigate the value of SMO and GLI1 genes in the hedgehog pathway in malignant mesothelioma specimens. Further study on the expression and prognosis of SMO and GLI1 in malignant mesothelioma tissues and the relationship between the two and the molecular mechanisms of mesothelioma immunity and to further investigate the prognostic value of mesothelioma expression. Materials and Methods Immunohistochemistry and RT-qPCR were applied to detect the expression of SMO and GLI1 proteins and mRNA in biopsy specimens and plasma cavity effusion specimens from malignant mesothelioma (n = 130) and benign mesothelial tissues (n = 50) and to analyze the clinicopathological significance and survival risk factors of SMO and GLI1 protein expression in mesothelioma. The mechanisms of mesothelioma cell expression and immune cell infiltration were investigated using bioinformatics methods. Results SMO and GLI1 in mesothelioma tissues detected high concordance between the diagnostic results of mesothelioma biopsy specimens and plasma cavity effusion specimens. The expression levels of SMO and GLI1 protein and mRNA in mesothelioma tissues were higher than those in benign mesothelioma tissues. The expression levels of SMO and GLI1 protein were correlated with the age, site, and asbestos exposure history of patients with mesothelioma. The expression levels of SMO and GLI1 protein were correlated with the expressions of ki67 and p53 (P < 0.05). SMO and GLI1 gene expression levels were negatively correlated with good prognosis in mesothelioma patients (P < 0.05). Cox proportional risk model indicated that protein expressions of invasion, lymph node metastasis, distant metastasis, staging, and genes were independent prognostic factors of mesothelioma. The GEPIA database showed the overall survival rate and the disease-free survival rate of mesothelioma patients in the high SMO and GLI1 expression groups; the UALCAN database analysis showed lower SMO expression levels in mesothelioma patients with more pronounced TP53 mutations (P = 0.001); GLI1 gene expression levels were strongly correlated with lymph node metastasis in mesothelioma patients (P = 0.009). Timer database analysis showed that the mechanism of immune cell infiltration was closely related to SMO and GLI1 expression. The degree of immune cell infiltration was strongly correlated with the prognosis of mesothelioma patients (P < 0.05). Conclusion The expression levels of both SMO and GLI1 proteins were higher than those of normal mesothelial tissues, and the mRNA expression levels also changed in the same direction. SMO and GLI1 gene expressions in mesothelioma were negatively correlated with age, site of occurrence, and history of asbestos exposure. Positive expression of SMO and GLI1 was negatively correlated with patient survival. The Cox proportional risk model showed that gender, history of asbestos exposure, site of occurrence, SMO, and GLI1 were independent prognostic factors for mesothelioma. The mechanism of immune cell infiltration in mesothelioma is closely related to the gene expression of both and the survival prognosis of mesothelioma patients.
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Affiliation(s)
- Guan-Ying Ma
- Department of Clinical Pathology, Chengde Medical University, Chengde, Hebei 067000, China
| | - Shuai Shi
- Department of Pathology, Cangzhou People's Hospital, Cangzhou, Hebei 061000, China
| | - Yin-Zhou Sang
- Department of Pathology, Cangzhou People's Hospital, Cangzhou, Hebei 061000, China
| | - Ping Wang
- Department of Pathology, Cangzhou People's Hospital, Cangzhou, Hebei 061000, China
| | - Zhi-Gang Zhang
- Department of Pathology, Cangzhou People's Hospital, Cangzhou, Hebei 061000, China
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Paajanen J, Bueno R, De Rienzo A. The Rocky Road from Preclinical Findings to Successful Targeted Therapy in Pleural Mesothelioma. Int J Mol Sci 2022; 23:13422. [PMID: 36362209 PMCID: PMC9658134 DOI: 10.3390/ijms232113422] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 10/31/2022] [Accepted: 11/01/2022] [Indexed: 11/19/2023] Open
Abstract
Pleural mesothelioma (PM) is a rare and aggressive disease that arises from the mesothelial cells lining the pleural cavity. Approximately 80% of PM patients have a history of asbestos exposure. The long latency period of 20-40 years from the time of asbestos exposure to diagnosis, suggests that multiple somatic genetic alterations are required for the tumorigenesis of PM. The genomic landscape of PM has been characterized by inter- and intratumor heterogeneity associated with the impairment of tumor suppressor genes such as CDKN2A, NF2, and BAP1. Current systemic therapies have shown only limited efficacy, and none is approved for patients with relapsed PM. Advances in understanding of the molecular landscape of PM has facilitated several biomarker-driven clinical trials but so far, no predictive biomarkers for targeted therapies are in clinical use. Recent advances in the PM genetics have provided optimism for successful molecular strategies in the future. Here, we summarize the molecular mechanism underlying PM pathogenesis and review potential therapeutic targets.
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Affiliation(s)
| | - Raphael Bueno
- The Thoracic Surgery Oncology Laboratory and The International Mesothelioma Program, Division of Thoracic Surgery and the Lung Center, Brigham and Women’s Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA
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7
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Nabeshima K, Hamasaki M, Kinoshita Y, Matsumoto S, Sa-Ngiamwibool P. Update of pathological diagnosis of pleural mesothelioma using genomic-based morphological techniques, for both histological and cytological investigations. Pathol Int 2022; 72:389-401. [PMID: 35596704 DOI: 10.1111/pin.13235] [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: 01/20/2022] [Accepted: 04/28/2022] [Indexed: 11/30/2022]
Abstract
As more than 80% of pleural mesothelioma (PM) cases start with pleural effusions, diagnosis with effusion smear cytology or pleural biopsy is important. For diagnosing PM, a three-step approach is used: (1) detecting atypical cells; (2) verifying their mesothelial origin using immunohistochemistry (IHC); and (3) discriminating PM from benign mesothelial proliferations (BMP). The third step is critical for diagnosing early lesions. In small biopsy or cytologic specimens in which tumor cell fat invasion cannot be assessed, genomic-based assays, including IHC-detected BAP1 loss and fluorescence in situ hybridization (FISH)-detected homozygous deletion (HD) of CDKN2A/p16, are effective for differentiation. Both BAP1 IHC and CDKN2A FISH can equally be applied to histologic and cytologic specimens, with 100% specificity in discriminating PM from BMP. We found that methylthioadenosine phosphorylase (MTAP) loss as detected by IHC could serve as a feasible alternative in tissue and cytologic preparations for CDKN2A FISH. However, a combination including FISH was still most effective: the addition of NF2 FISH to CDKN2A FISH and BAP1 IHC yielded a greater sensitivity of close to 100% in diagnosing PM tissues. Although IHC is more feasible than FISH, owing to remaining challenges in data interpretation, caution and familiarity are warranted when diagnosing PM.
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Affiliation(s)
- Kazuki Nabeshima
- Department of Pathology, Fukuoka University School of Medicine and Hospital, Fukuoka, Japan
| | - Makoto Hamasaki
- Department of Pathology, Fukuoka University School of Medicine and Hospital, Fukuoka, Japan
| | - Yoshiaki Kinoshita
- Department of Pathology, Fukuoka University School of Medicine and Hospital, Fukuoka, Japan
| | - Shinji Matsumoto
- Department of Pathology, Fukuoka University School of Medicine and Hospital, Fukuoka, Japan
| | - Prakasit Sa-Ngiamwibool
- Department of Pathology, Fukuoka University School of Medicine and Hospital, Fukuoka, Japan.,Department of Pathology, Faculty of Medicine, Khon Kaen University, Khon Kean, Thailand
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8
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Pezzicoli G, Rizzo M, Perrone M, Minei S, Mutti L, Porta C. A Glimpse in the Future of Malignant Mesothelioma Treatment. Front Pharmacol 2022; 12:809337. [PMID: 34975505 PMCID: PMC8714955 DOI: 10.3389/fphar.2021.809337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 12/02/2021] [Indexed: 12/23/2022] Open
Abstract
Malignant mesothelioma (MMe) is a rare neoplasm with few therapeutic options available. The landscape of effective therapy for this disease remained unchanged in the last two decades. Recently, however, the introduction of Immune Checkpoint Inhibitors (ICIs) led to small, but nevertheless, promising improvements. However, many efforts are still needed to radically improve the prognosis of MMe. In this review, we analyze all those therapeutic strategies for MMe that are still in a preclinical or early clinical phase of development. In particular, we focus on novel antiangiogenic drugs and their possible combination with immunotherapy. Furthermore, we describe also more complex strategies such as microRNA-loaded vectors, oncolytic viruses, and engineered lymphocytes.
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Affiliation(s)
- Gaetano Pezzicoli
- Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro, Bari, Italy
| | - Mimma Rizzo
- A.O.U. Consorziale Policlinico di Bari, Bari, Italy
| | - Martina Perrone
- Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro, Bari, Italy
| | - Silvia Minei
- Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro, Bari, Italy
| | - Luciano Mutti
- Italian Group for Research and Therapy for Mesothelioma (GIMe), Voghera, Italy
| | - Camillo Porta
- Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro, Bari, Italy.,A.O.U. Consorziale Policlinico di Bari, Bari, Italy
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Sidhu C, Louw A, Gary Lee YC. Malignant Pleural Mesothelioma: Updates for Respiratory Physicians. Clin Chest Med 2021; 42:697-710. [PMID: 34774176 DOI: 10.1016/j.ccm.2021.08.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Calvin Sidhu
- Respiratory Medicine, Sir Charles Gairdner Hospital, Perth, Western Australia; Pleural Medicine Unit, Institute for Respiratory Health, Perth, Western Australia; School of Medical & Health Sciences, Edith Cowan University, Perth, Western Australia
| | - Amber Louw
- Pleural Medicine Unit, Institute for Respiratory Health, Perth, Western Australia; School of Medical & Health Sciences, Edith Cowan University, Perth, Western Australia; National Centre for Asbestos Related Diseases, University of Western Australia
| | - Y C Gary Lee
- Respiratory Medicine, Sir Charles Gairdner Hospital, Perth, Western Australia; Pleural Medicine Unit, Institute for Respiratory Health, Perth, Western Australia; School of Medical & Health Sciences, Edith Cowan University, Perth, Western Australia; School of Medicine, University of Western Australia, Perth, Western Australia.
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10
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Nowak AK, Jackson A, Sidhu C. Management of Advanced Pleural Mesothelioma-At the Crossroads. JCO Oncol Pract 2021; 18:116-124. [PMID: 34491782 DOI: 10.1200/op.21.00426] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The management of pleural mesothelioma has changed with the demonstration that first-line checkpoint blockade therapy improves survival. This review covers issues of relevance to the practicing medical oncologist, with an emphasis on the palliative setting and on new information. Until recently, standard systemic therapy for mesothelioma was combination chemotherapy with platinum and pemetrexed. In 2020, combination immunotherapy with ipilimumab and nivolumab was approved as first-line systemic therapy for mesothelioma following release of the results from the CheckMate 743 trial. This trial showed improved overall survival for patients receiving ipilimumab and nivolumab over those treated with platinum and pemetrexed chemotherapy. When the survival results were examined by histologic subtype, the survival benefit was most significant in those with nonepithelioid mesothelioma, a group for which combination immunotherapy is now standard of care. The most important outstanding issue from CheckMate-743 is a better understanding, through translational studies, of which patients with epithelioid mesothelioma may benefit from combination immunotherapy. The next generation of first-line clinical trials in mesothelioma will report the results of first-line combination chemoimmunotherapy. For those patients who receive first-line dual checkpoint blockade, there is no evidence as to the efficacy of subsequent chemotherapy. However, given the known first-line efficacy of cisplatin or carboplatin and pemetrexed, combination chemotherapy is an appropriate subsequent choice for those who progress on or after dual immunotherapy. For those who previously received chemotherapy without immunotherapy, single-agent nivolumab provides benefit over best supportive care. In summary, both chemotherapy and immunotherapy should be considered for all patients during their disease course. Another topical issue is the growing appreciation that some individuals have an inherited predisposition to mesothelioma; referral to a clinical geneticist should be considered under some circumstances. The role of surgery and multimodality therapy is controversial, with results awaited from the fully recruited MARS-2 clinical trial. Patient selection, staging, and multidisciplinary review are critical to identify those who might benefit from a multimodality approach. Finally, a proactive, multidisciplinary approach to symptom management and the principles of management of pleural effusions are critical to manage the symptom burden of mesothelioma and optimize patient well-being.
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Affiliation(s)
- Anna K Nowak
- National Centre for Asbestos Related Diseases, Centre for Respiratory Health, University of Western Australia, Perth, Australia.,Medical School, University of Western Australia, Perth, Australia.,Department of Medical Oncology, Sir Charles Gairdner Hospital, Nedlands, Australia
| | - Alannah Jackson
- Department of Medical Oncology, Sir Charles Gairdner Hospital, Nedlands, Australia
| | - Calvin Sidhu
- Department of Respiratory Medicine, Sir Charles Gairdner Hospital, Perth, Australia.,Edith Cowan University, Perth, Australia
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11
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Yeap BY, De Rienzo A, Gill RR, Oster ME, Dao MN, Dao NT, Levy RD, Vermilya K, Gustafson CE, Ovsak G, Richards WG, Bueno R. Mesothelioma Risk Score: A New Prognostic Pretreatment, Clinical-Molecular Algorithm for Malignant Pleural Mesothelioma. J Thorac Oncol 2021; 16:1925-1935. [PMID: 34242791 DOI: 10.1016/j.jtho.2021.06.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 04/22/2021] [Accepted: 06/07/2021] [Indexed: 01/09/2023]
Abstract
INTRODUCTION Prognostic models for malignant pleural mesothelioma have been limited to demographics, symptoms, and laboratory values. We hypothesize higher accuracy using both tumor and patient characteristics. The mesothelioma prognostic test (MPT) and molecular subtype based on claudin-15-to-vimentin expression ratio are molecular signatures associated with survival. Tumor volume (TV) has improved performance compared with clinical staging, whereas neutrophil-to-lymphocyte ratio (NLR) is prognostic for malignant pleural mesothelioma. METHODS Tumor specimens and clinical data were collected prospectively from patients who underwent extrapleural pneumonectomy (EPP) or pleurectomy and decortication (PD) during 2007 to 2014. MPT and claudin-15-to-vimentin ratio were determined by real-time quantitative polymerase chain reaction, whereas TV was assessed from preoperative scans. Risk groups were derived from combinations of adverse factors on the basis of the Cox model. Predictive accuracy was assessed using Harrell's c-index. RESULTS MPT, molecular subtype, TV, and NLR were independently prognostic in patients with EPP (N = 191), suggesting equal weighting in a final three-group model (c = 0.644). In the PD cohort (N = 193), MPT poor risk combined with TV greater than 200 cm3 was associated with triple the risk compared with other subgroups (hazard ratio = 2.94, 95% confidence interval: 1.70-5.09, p < 0.001) persisting when adjusted for molecular subtype, NLR, performance status, and serum albumin to yield a final three-group model (c = 0.641). The EPP and PD models achieved higher accuracy than published models (c ≤ 0.584, c ≤ 0.575) and pathologic staging (c = 0.554, c = 0.571). CONCLUSIONS The novel models use pretreatment parameters obtained from minimally invasive biopsy, imaging, and blood tests to evaluate the expected outcome of each type of surgery in newly diagnosed patients and improve stratification on clinical trials.
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Affiliation(s)
- Beow Y Yeap
- Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Assunta De Rienzo
- Thoracic Surgery Oncology Laboratory and International Mesothelioma Program (www.impmeso.org), Division of Thoracic and Cardiac Surgery and The Lung Center, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Ritu R Gill
- Department of Radiology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
| | - Michela E Oster
- Thoracic Surgery Oncology Laboratory and International Mesothelioma Program (www.impmeso.org), Division of Thoracic and Cardiac Surgery and The Lung Center, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Mary N Dao
- Thoracic Surgery Oncology Laboratory and International Mesothelioma Program (www.impmeso.org), Division of Thoracic and Cardiac Surgery and The Lung Center, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Nhien T Dao
- Thoracic Surgery Oncology Laboratory and International Mesothelioma Program (www.impmeso.org), Division of Thoracic and Cardiac Surgery and The Lung Center, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts; Present Address: Takeda, Cambridge, Massachusetts
| | - Rachel D Levy
- Thoracic Surgery Oncology Laboratory and International Mesothelioma Program (www.impmeso.org), Division of Thoracic and Cardiac Surgery and The Lung Center, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Kimberly Vermilya
- Thoracic Surgery Oncology Laboratory and International Mesothelioma Program (www.impmeso.org), Division of Thoracic and Cardiac Surgery and The Lung Center, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Corinne E Gustafson
- Thoracic Surgery Oncology Laboratory and International Mesothelioma Program (www.impmeso.org), Division of Thoracic and Cardiac Surgery and The Lung Center, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Gavin Ovsak
- Department of Anesthesia, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - William G Richards
- Thoracic Surgery Oncology Laboratory and International Mesothelioma Program (www.impmeso.org), Division of Thoracic and Cardiac Surgery and The Lung Center, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Raphael Bueno
- Thoracic Surgery Oncology Laboratory and International Mesothelioma Program (www.impmeso.org), Division of Thoracic and Cardiac Surgery and The Lung Center, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.
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12
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Freudenberger DC, Shah RD. A narrative review of the health disparities associated with malignant pleural mesothelioma. J Thorac Dis 2021; 13:3809-3815. [PMID: 34277071 PMCID: PMC8264689 DOI: 10.21037/jtd-20-3516] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 04/08/2021] [Indexed: 11/08/2022]
Abstract
Malignant pleural mesothelioma (MPM) is a cancer of the mesothelial lining of the pleura that has traditionally been associated with asbestos exposure in an industrial setting. Asbestos usage has fortunately been banned or phased out in most industrialized countries resulting in its decline in countries such as the United States. Despite this, MPM continues to place significant burden on its affected patients resulting in overall poor prognosis and survival. Questions arise as to what factors, especially what health disparities, contribute to the disease’s dismal prognosis. This article will present a narrative review of recent literature that identifies the impact age, sex, race, access to medical centers, and economics have on the diagnosis, treatment, and prognosis of MPM. As will be discussed, research has shown that factors including younger age, female sex, non-white race, private insurance, Medicare, and higher income have been associated with better survival in MPM. Whereas older age, male sex, white race, lack of insurance, and lower income are associated with worse survival. The identification of these and other health disparities related to MPM may allow for future research, clinical guidelines, and policies to be implemented to decrease the burden health disparities create in the diagnosis, treatment, and prognosis of patients with MPM.
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Affiliation(s)
- Devon C Freudenberger
- Division of Cardiothoracic Surgery, Virginia Commonwealth University School of Medicine, Richmond, VA, USA
| | - Rachit D Shah
- Division of Cardiothoracic Surgery, Virginia Commonwealth University School of Medicine, Richmond, VA, USA
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13
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Huang R, Zheng Z, Liu S, Yan P, Song D, Yin H, Hu P, Zhu X, Chang Z, Liu Y, Zhuang J, Meng T, Huang Z, Zhang J. Identification of prognostic and bone metastasis-related alternative splicing signatures in mesothelioma. Cancer Med 2021; 10:4478-4492. [PMID: 34041868 PMCID: PMC8267146 DOI: 10.1002/cam4.3977] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/31/2021] [Accepted: 04/01/2021] [Indexed: 01/18/2023] Open
Abstract
Mesothelioma (MESO) is an infrequent tumor derived from mesothelial cells of pleura, peritoneum, pericardium, and tunica vaginalis testis. Despite advancement in technologies and better understanding of tumor progression mechanism, the prognosis of MESO remains poor. The role of alternative splicing events (ASEs) in the oncogenesis, tumor metastasis and drug resistance has been widely discussed in multiple cancers. But the prognosis and potential therapeutic value of ASEs in MESO were not clearly studied by now. We constructed a prognostic model using RNA sequencing data and matched ASE data of MESO patients obtained from the TCGA and TCGASpliceSeq database. A total of 3,993 ASEs were identified associated with overall survival using Cox regression analysis. Eight of them were finally figured out to institute the model by lasso regression analysis. The risk score of the model can predict the prognosis independently. Among the identified 390 splicing factors (SF), HSPA1A and DDX3Y was significantly associated with 43 OS-SEs. Among these OS-SEs, SNX5-58744-AT (p = 0.048) and SNX5-58745-AT (p = 0.048) were significantly associated with bone metastasis. Co-expression analysis of signal pathways and SNX5-58744-AT, SNX5-58745-AT was also depicted using GSVA. Finally, we proposed that splicing factor (SF) HSPA1A could regulate SNX5-58744-AT (R = -0.414) and SNX5-58745-AT (R = 0.414) through the pathway "Class I MHC mediated antigen processing and presentation" (R = 0.400). In this way, tumorigenesis and bone metastasis of MESO were controlled.
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Affiliation(s)
- Runzhi Huang
- Department of Gynecology, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China.,Division of Spine, Department of Orthopedics, Tongji Hospital affiliated to Tongji University School of Medicine, Shanghai, China.,Tongji University School of Medicine, Shanghai, China
| | - Zixuan Zheng
- Tongji University School of Medicine, Shanghai, China
| | - Sijia Liu
- Tongji University School of Medicine, Shanghai, China
| | - Penghui Yan
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Dianwen Song
- Department of Orthopedics, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Huabin Yin
- Department of Orthopedics, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Peng Hu
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xiaolong Zhu
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhengyan Chang
- Department of Pathology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yihan Liu
- Tongji University School of Medicine, Shanghai, China
| | - Juanwei Zhuang
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Tong Meng
- Division of Spine, Department of Orthopedics, Tongji Hospital affiliated to Tongji University School of Medicine, Shanghai, China.,Department of Orthopedics, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Zongqiang Huang
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Jie Zhang
- Department of Gynecology, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China.,Division of Spine, Department of Orthopedics, Tongji Hospital affiliated to Tongji University School of Medicine, Shanghai, China.,Tongji University School of Medicine, Shanghai, China
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14
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Mummadi SR, Stoller JK, Lopez R, Kailasam K, Gillespie C, Hahn PY. Epidemiology of Adult Pleural Disease in the United States. Chest 2021; 160:1534-1551. [PMID: 34023322 DOI: 10.1016/j.chest.2021.05.026] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 04/27/2021] [Accepted: 05/10/2021] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Comprehensive US epidemiologic data for adult pleural disease are not available. RESEARCH QUESTION What are the epidemiologic measures related to adult pleural disease in the United States? STUDY DESIGN AND METHODS Retrospective cohort study using Healthcare Utilization Project databases (2007-2016). Adults (≥ 18 years of age) with malignant pleural mesothelioma, malignant pleural effusion, nonmalignant pleural effusion, empyema, primary and secondary spontaneous pneumothorax, iatrogenic pneumothorax, and pleural TB were studied. RESULTS In 2016, ED treat-and-discharge (T&D) visits totaled 42,215, accounting for charges of $286.7 million. In 2016, a total of 361,270 hospitalizations occurred, resulting in national costs of $10.1 billion. A total of 64,174 readmissions contributed $1.16 billion in additional national costs. Nonmalignant pleural effusion constituted 85.5% of ED T&D visits, 63.5% of hospitalizations, and 66.3% of 30-day readmissions. Contemporary sex distribution (male to female ratio) in primary spontaneous pneumothorax (2.1:1) differs from older estimates (6.2:1). Decadal analyses of annual hospitalization rates/100,000 adult population (2007 vs 2016) showed a significant (P < .001) decrease for malignant pleural mesothelioma (1.3 vs 1.09, respectively), malignant pleural effusion (33.4 vs 31.9, respectively), iatrogenic pneumothorax (17.9 vs 13.9, respectively), and pleural TB (0.20 vs 0.09, respectively) and an increase for empyema (8.1 vs 11.1, respectively) and nonmalignant pleural effusion (78.1 vs 100.1, respectively). Empyema hospitalizations have high costs per case ($38,591) and length of stay (13.8 days). The mean proportion of readmissions attributed to a pleural cause varied widely: malignant pleural mesothelioma, 49%; malignant pleural effusion, 45%; nonmalignant pleural effusion, 31%; empyema, 27%; primary spontaneous pneumothorax, 27%; secondary spontaneous pneumothorax, 27%; and iatrogenic pneumothorax, 20%. INTERPRETATION Significant epidemiologic trends and changes in various pleural disease were observed. The analysis identifies multiple opportunities for improvement in management of pleural disease.
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Affiliation(s)
| | - James K Stoller
- Education Institute, Cleveland Clinic Foundation, Cleveland, OH
| | - Rocio Lopez
- Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH
| | - Karthik Kailasam
- Community Care Institute, Cleveland Clinic Foundation, Cleveland, OH
| | - Colin Gillespie
- Respiratory Institute, Cleveland Clinic Foundation, Cleveland, OH
| | - Peter Y Hahn
- Department of Pulmonary and Critical Care, Metro Health-University of Michigan Health, Wyoming, MI
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15
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The concept of mesothelioma in situ, with consideration of its potential impact on cytology diagnosis. Pathology 2021; 53:446-453. [PMID: 33775406 DOI: 10.1016/j.pathol.2020.12.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 12/14/2020] [Accepted: 12/18/2020] [Indexed: 12/24/2022]
Abstract
Diffuse malignant mesothelioma (MM) is an incurable tumour of the serosal membranes, which is often caused by exposure to asbestos and commonly diagnosed at advanced stage. Malignant mesothelioma in situ (MMIS) is now included as diagnostic category by the World Health Organization (WHO). However, our international survey of 34 pulmonary pathologists with an interest in MM diagnosis highlights inconsistency regarding how the diagnosis is being made by experts, despite published guidelines. Whilst the WHO restricts the diagnosis to surgical samples, the very concept has implication for cytological diagnosis, which is already regarded as controversial in itself by some. MMIS is currently only applicable as precursor to MM with an epithelioid component, and raises the possibility for different molecular pathways for different histological MM subtypes. The clinical implications of MMIS at this stage are uncertain, but aggressive therapies are being initiated in some instances. Based on the results of the survey we here present a critical appraisal of the concept, its clinical and conceptual implications and provide practice suggestions for diagnosis. A low threshold for ancillary testing is suggested. The designations of 'malignant mesothelioma, cannot exclude MMIS' or 'atypical mesothelial proliferation with molecular indicators of malignancy, so-called MMIS' could be used on cytology samples, adding 'no evidence of invasion in sample provided' for surgical samples. Clinical and radiological correlation are integral to diagnosis and best done at multidisciplinary meetings. Finally, collaborative studies are required to improve our understanding of MMIS.
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16
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Letter to the Editor: Largely Unchanged Annual Incidence and Overall Survival of Pleural Mesothelioma in the USA. World J Surg 2020; 44:4279-4280. [DOI: 10.1007/s00268-020-05737-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/21/2020] [Indexed: 11/27/2022]
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17
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Thomas R, Rahman NM, Maskell NA, Lee YCG. Pleural effusions and pneumothorax: Beyond simple plumbing: Expert opinions on knowledge gaps and essential next steps. Respirology 2020; 25:963-971. [PMID: 32613624 DOI: 10.1111/resp.13881] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 04/15/2020] [Accepted: 04/29/2020] [Indexed: 12/17/2022]
Abstract
Pleural diseases affect millions of people worldwide. Pleural infection, malignant pleural diseases and pneumothorax are common clinical challenges. A large number of recent clinical trials have provided an evidence-based platform to evaluate conventional and novel methods to drain pleural effusions/air which reduce morbidity and unnecessary interventions. These successes have generated significant enthusiasm and raised the profile of pleural medicine as a new subspecialty. The ultimate goal of pleural research is to prevent/stop development of pleural effusions/pneumothorax. Current research studies mainly focus on the technical aspects of pleural drainage. Significant knowledge gaps exist in many aspects such as understanding of the pathobiology of the underlying pleural diseases, pharmacokinetics of pleural drug delivery, etc. Answers to these important questions are needed to move the field forward. This article collates opinions of leading experts in the field in highlighting major knowledge gaps in common pleural diseases to provoke thinking beyond pleural drainage. Recognizing the key barriers will help prioritize future research in the quest to ultimately cure (rather than just drain) these pleural conditions.
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Affiliation(s)
- Rajesh Thomas
- Department of Respiratory Medicine, Sir Charles Gairdner Hospital, Perth, WA, Australia.,Pleural Medicine Unit, Institute for Respiratory Health, Perth, WA, Australia
| | - Najib M Rahman
- Oxford Centre for Respiratory Medicine, Churchill Hospital, Oxford, UK.,Oxford NIHR Biomedical Research Centre, Oxford, UK
| | - Nick A Maskell
- Academic Respiratory Unit, Bristol Medical School, University of Bristol, Bristol, UK.,North Bristol Lung Centre, North Bristol NHS Trust, Bristol, UK
| | - Y C Gary Lee
- Department of Respiratory Medicine, Sir Charles Gairdner Hospital, Perth, WA, Australia.,Pleural Medicine Unit, Institute for Respiratory Health, Perth, WA, Australia.,Centre for Respiratory Health, School of Medicine, University of Western Australia, Perth, WA, Australia
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18
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Tang A, Rappaport J, Raja S, Bribriesco AC, Sudarshan M, Siddiqui HU, Raymond D, Murthy SC, Ahmad U. Signet Ring Cell Histology Confers Worse Overall Survival in Treated Esophageal Adenocarcinoma. Ann Thorac Surg 2020; 111:214-222. [PMID: 32579884 DOI: 10.1016/j.athoracsur.2020.04.134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 03/21/2020] [Accepted: 04/27/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND Signet ring cell (SRC) histology is regarded as a poor prognostic indicator for esophageal cancer. The objectives of this study were to understand the clinical presentation and stage-specific survival outcomes of patients with SRC and nonsignet adenocarcinoma (AC). METHODS From 2004 to 2016, 140,324 patients were diagnosed with esophageal and gastroesophageal junction cancers in the National Cancer Database. Demographics, tumor variables, and treatment were studied. Overall survival was shown by the Kaplan-Meier method, and random survival forest identified important predictors. RESULTS SRC patients (N = 3825) comprised roughly 3% of esophageal cancers per year. SRC patients were less likely to present at early stage disease (cStage I: 10.2% vs 17.8% for AC; P < .001) and more likely to have pathologic upstaging (28% vs 16%, P < .001) and less pathologic downstaging after neoadjuvant therapy (36% vs 48%, P < .001). More SRC patients had positive margins after resection (15% vs 6.0%, P < .001). In a stage-matched comparison median survival for SRC patients was worse than for AC patients (cStage I: 60 vs 113 months; cStage II: 31 vs 40 months; cStage III: 22 vs 30 months). Clinical tumor and nodal stage, chemotherapy sequence, and age were important predictors of survival. CONCLUSIONS SRC patients had worse survival than their AC counterparts. Worse biology and higher rates of incomplete resection in SRC should steer patients away from undergoing limited resection, such as endoscopic submucosal dissection, even when identified at very early stages. In future esophageal cancer staging iterations, separating SRC from AC appears to be indicated because of their different clinical behavior and response to therapy.
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Affiliation(s)
- Andrew Tang
- Department of Thoracic and Cardiovascular Surgery, Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio
| | - Jesse Rappaport
- Department of Thoracic and Cardiovascular Surgery, Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio
| | - Siva Raja
- Department of Thoracic and Cardiovascular Surgery, Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio
| | - Alejandro C Bribriesco
- Department of Thoracic and Cardiovascular Surgery, Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio
| | - Monisha Sudarshan
- Department of Thoracic and Cardiovascular Surgery, Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio
| | - Hafiz U Siddiqui
- Department of Thoracic and Cardiovascular Surgery, Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio
| | - Daniel Raymond
- Department of Thoracic and Cardiovascular Surgery, Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio
| | - Sudish C Murthy
- Department of Thoracic and Cardiovascular Surgery, Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio; Taussig Cancer Center, Cleveland Clinic, Cleveland, Ohio
| | - Usman Ahmad
- Department of Thoracic and Cardiovascular Surgery, Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio; Taussig Cancer Center, Cleveland Clinic, Cleveland, Ohio.
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19
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Inhibition of miR-18a-3p reduces proliferation of mesothelioma cells and sensitizes them to cisplatin. Oncol Lett 2020; 19:4161-4168. [PMID: 32382354 DOI: 10.3892/ol.2020.11504] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 02/10/2020] [Indexed: 12/29/2022] Open
Abstract
Malignant pleural mesothelioma is a notorious human malignancy. Despite combination chemotherapy with cisplatin and pemetrexed, the majority of patients with advanced malignant pleural mesothelioma have a poor prognosis. MicroRNAs (miRNAs/miRs) are short non-coding RNAs that regulate various biological processes by binding to the 3'-untranslated region of target gene mRNAs and suppressing their expression. Since abnormal expression patterns of miRNAs are a common feature in human malignancies, a number of them have been researched as potential therapeutic targets. Our previous study demonstrated that microRNA-18a (miR-18a) is upregulated in mesothelioma cell lines compared with in non-neoplastic mesothelial tissues, but its function remains unclear. In the present study, miRNA inhibitor was transfected into mesothelioma cell lines and then analyzed various cellular functions. Mesothelioma cells transfected with the miR-18a inhibitor exhibited lower proliferation and migration rates compared with cells transfected with a negative control inhibitor in proliferation and wound scratch assays, respectively. Additionally, the present study revealed that downregulation of miR-18a increased mesothelioma cell apoptosis. In a chemosensitivity assay, transfection of the miR-18a inhibitor significantly increased the sensitivity of mesothelioma cells to cisplatin but not to pemetrexed. Therefore, miR-18a may be a potential therapeutic target for mesothelioma resistant to cisplatin.
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