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Chi Z, Xu J, Karamchandani DM, Peng L. INSM1 is a useful neuroendocrine marker to differentiate pancreatic serous cystadenoma from pancreatic well-differentiated neuroendocrine tumors in cytology and surgical specimens. Ann Diagn Pathol 2024; 71:152304. [PMID: 38614035 DOI: 10.1016/j.anndiagpath.2024.152304] [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] [Received: 03/19/2024] [Revised: 04/04/2024] [Accepted: 04/06/2024] [Indexed: 04/15/2024]
Abstract
INTRODUCTION Differentiating pancreatic serous cystadenoma (SCA) from well-differentiated neuroendocrine tumors (WDNETs) based on histomorphology is critical yet challenging, particularly in small biopsy samples. Our study aimed to examine the expression profile of INSM1 in cytologic and surgical resection specimens from pancreatic SCA to evaluate its potential as a discriminative marker against pancreatic WDNET. METHODS We characterized INSM1 immunohistochemistry in 34 patients with pancreatic SCA, comprising 23 surgical resections and 11 cytology specimens. As a control, we used 28 cytology specimens from pancreatic WDNET. Clinical information was retrieved through a review of electronic medical records. RESULTS All 11 pancreatic SCA cytology specimens and 15 of 23 pancreatic SCA surgical resections exhibited absent INSM1 immunostaining. Each of the remaining eight surgical resection specimens demonstrated 1 % immunoreactivity. In contrast, 27 out of 28 (96 %) pancreatic WDNET cytology specimens were positive for INSM1 immunostaining, with a median immunoreactivity of 90 % and a range of 30-90 %. Overall, INSM1 immunostains perform similarly to chromogranin and synaptophysin in pancreatic SCA. CONCLUSIONS The results indicate that INSM1 immunohistochemistry staining may serve as a useful neuroendocrine marker to differentiate pancreatic SCA from pancreatic WDNET in clinical practice. To our knowledge, this represents the first large-scale study to evaluate INSM1 immunostaining in surgical and cytology specimens from pancreatic SCA.
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Affiliation(s)
- Zhikai Chi
- Department of Pathology, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
| | - Jing Xu
- Department of Pathology, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Dipti M Karamchandani
- Department of Pathology, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Lan Peng
- Department of Pathology, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
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2
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Garcia-Porrero G, Wood F, Faria S, Kelly PJ, McCluggage WG. "Aberrant" expression of skeletal muscle markers in neuroendocrine carcinomas: a significant diagnostic pitfall. Virchows Arch 2024:10.1007/s00428-024-03838-0. [PMID: 38833174 DOI: 10.1007/s00428-024-03838-0] [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: 04/09/2024] [Revised: 05/27/2024] [Accepted: 05/28/2024] [Indexed: 06/06/2024]
Abstract
In this study, we investigate the expression of muscle markers, including the specific skeletal muscle markers myogenin and myoD1, in neuroendocrine carcinomas (NECs). The study included 23 NECs from various sites (14 small cell NECs and 9 large cell NECs). These were stained with desmin, myogenin and myoD1. Positive staining with at least one muscle marker was observed in 14 cases (61%). 8 (35%), 8 (35%) and 11 (48%) of the cases were positive with desmin, myogenin and myoD1 respectively. In most, but not all, cases positive staining was focal generally involving < 10% of tumour cells. Expression of muscle markers is not uncommon in NECs. This represents an important diagnostic pitfall of which pathologists should be aware. In reporting this phenomenon, we speculate on the pathogenesis of this "aberrant" expression of muscle markers.
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Affiliation(s)
- Guillermo Garcia-Porrero
- Department of Pathology, Belfast Health and Social Care Trus, Grosvenor Road, Belfast, BT12 6BA, UK
| | - Faye Wood
- Department of Pathology, Belfast Health and Social Care Trus, Grosvenor Road, Belfast, BT12 6BA, UK
| | - Sara Faria
- Department of Pathology, Belfast Health and Social Care Trus, Grosvenor Road, Belfast, BT12 6BA, UK
| | - Paul J Kelly
- Department of Pathology, Belfast Health and Social Care Trus, Grosvenor Road, Belfast, BT12 6BA, UK
| | - W Glenn McCluggage
- Department of Pathology, Belfast Health and Social Care Trus, Grosvenor Road, Belfast, BT12 6BA, UK.
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3
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Lopez F, Agaimy A, Franchi A, Suárez C, Vander Poorten V, Mäkitie AA, Homma A, Eisbruch A, Olsen KD, Saba NF, Nuyts S, Snyderman C, Beitler JJ, Corry J, Hanna E, Hellquist H, Rinaldo A, Ferlito A. Update on olfactory neuroblastoma. Virchows Arch 2024; 484:567-585. [PMID: 38386106 DOI: 10.1007/s00428-024-03758-z] [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] [Received: 12/08/2023] [Revised: 01/18/2024] [Accepted: 02/01/2024] [Indexed: 02/23/2024]
Abstract
Olfactory neuroblastomas are uncommon malignancies that arise from olfactory receptor cells located high in the nasal cavity. Accurate diagnosis plays a crucial role in determining clinical results and guiding treatment decisions. Diagnosis can be a major challenge for pathologists, especially when dealing with tumours with poor differentiation. The discovery of several molecular and immunohistochemical markers would help to overcome classification difficulties. Due to the paucity of large-scale studies, standardisation of diagnosis, treatment and prediction of outcome remains a challenge. Surgical resection by endoscopic techniques with the addition of postoperative irradiation is the treatment of choice. In addition, it is advisable to consider elective neck irradiation to minimise the risk of nodal recurrence. Molecular characterisation will help not only to make more accurate diagnoses but also to identify specific molecular targets that can be used to develop personalised treatment options tailored to each patient. The present review aims to summarise the current state of knowledge on histopathological diagnosis, the molecular biology and management of this disease.
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Affiliation(s)
- Fernando Lopez
- Department of Otolaryngology, Hospital Universitario Central de Asturias, University of Oviedo, ISPA, IUOPA, CIBERONC, Avenida de Roma, S/N, 33011, Oviedo, Asturias, Spain.
| | - Abbas Agaimy
- Institut Für Pathologie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Alessandro Franchi
- Department of Translational Research and of New Technologies in Medicine and Surgery, University of Pisa, 56126, Pisa, Italy
| | | | - Vincent Vander Poorten
- Department of Otorhinolaryngology, Head and Neck Surgery, Department of Oncology, Section of Head and Neck Oncology, KU Leuven, and Leuven Cancer Institute, University Hospitals Leuven, Leuven, Belgium
| | - Antti A Mäkitie
- Department of Otorhinolaryngology - Head and Neck Surgery, Research Program in Systems Oncology, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
| | - Akihiro Homma
- Department of Otolaryngology - Head and Neck Surgery, Faculty of Medicine, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Avraham Eisbruch
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI, USA
| | - Kerry D Olsen
- Department of Otorhinolaryngology, Mayo Clinic, Rochester, MN, USA
| | - Nabil F Saba
- Department of Hematology and Medical Oncology, The Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - Sandra Nuyts
- Department of Radiation Oncology, University Hospitals Leuven, KU Leuven-University of Leuven, 3000, Leuven, Belgium
| | - Carl Snyderman
- Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | | | - June Corry
- Division of Radiation Oncology, GenesisCare Radiation Oncology, St. Vincent's Hospital, Melbourne, VIC, 3065, Australia
| | - Ehab Hanna
- Department of Head & Neck Surgery, The University of Texas M. D. Anderson Cancer Center, Houston, TX, USA
| | - Henrik Hellquist
- Faculty of Medicine and Biomedical Sciences (FMCB), University of Algarve, Algarve Biomedical Center Research Institute (ABC-RI), 8005-139, Faro, Portugal
- Department of Cellular Pathology, Northern Lincolnshire and Goole NHS Foundation Trust, Lincoln, LN2 5QY, UK
| | | | - Alfio Ferlito
- Coordinator of International Head and Neck Scientific Group, Padua, Italy
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4
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Szumera-Cieckiewicz A, Massi D, Cassisa A, Krzyzinski M, Dudzisz-Sledz M, Biecek P, Rutkowski P, Marszalek A, Hoang MP, Donizy P. SATB2, CKAE1/AE3, and synaptophysin as a sensitive immunohistochemical panel for the detection of lymph node metastases of Merkel cell carcinoma. Virchows Arch 2024; 484:629-636. [PMID: 38066198 PMCID: PMC11062961 DOI: 10.1007/s00428-023-03691-7] [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: 07/06/2023] [Revised: 10/11/2023] [Accepted: 10/29/2023] [Indexed: 05/02/2024]
Abstract
Histopathological evaluation of lymph nodes in Merkel cell carcinoma has become crucial in progression estimation and treatment modification. This study was undertaken to determine the most sensitive immunohistochemical panel for detecting MCC nodal metastases. We included 56 patients with 102 metastatic MCC lymph nodes, which were tested with seven antibodies: cytokeratin (CKAE1/AE3), CK20, chromogranin A, synaptophysin, INSM1, SATB2, and neurofilament (NF). Tissue microarrays (TMA) composed of 2-mm tissue cores from each nodal metastasis were constructed. A semiquantitative 5-tier scoring system (0%, < 25%, 25-74%, 75-99%, 100% positive MCC cells with moderate to strong reactivity) was implemented. In the statistical assessment, we included Merkel cell polyomavirus (MCPyV) status and expression heterogeneity between lymph nodes from one patient. A cumulative percentage of moderate to strong expression ≥ 75% of tumoral cells was observed for single cell markers as follows: 91/102 (89.2%) SATB2, 85/102 (83%) CKAE1/AE3, 80/102 (78.4%) synaptophysin, 75/102 (75.5%) INSM1, 68/102 (66.7%) chromogranin A, 60/102 cases (58.8%) CK20, and 0/102 (0%) NF. Three markers presented a complete lack of immunoreactivity: 8/102 (7.8%) CK20, 7/102 (6.9%) chromogranin A, and 6/102 (5.9%) NF. All markers showed expression heterogeneity in lymph nodes from one patient; however, the most homogenous was INSM1. The probability of detecting nodal MCC metastases was the highest while using SATB2 as a first-line marker (89.2%) with subsequential adding CKAE1/AE3 (99%); these results were independent of MCPyV status. Synaptophysin showed a superior significance in confirming the neuroendocrine origin of metastatic cells. This comprehensive analysis allows us to recommend simultaneous evaluation of SATB2, CKAE1/AE3, and synaptophysin in the routine pathologic MCC lymph node protocol.
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Affiliation(s)
- Anna Szumera-Cieckiewicz
- Department of Pathology, Maria Sklodowska-Curie National Research Institute of Oncology, W.K. Roentgena 5, 02-781, Warsaw, Poland.
- Member of EORTC Melanoma Pathology Working Group, Brussels, Belgium.
| | - Daniela Massi
- Member of EORTC Melanoma Pathology Working Group, Brussels, Belgium
- Section of Pathological Anatomy, Department of Health Sciences, University of Florence, Florence, Italy
| | - Angelo Cassisa
- Section of Pathology, Department of Oncology, San Giovanni Di Dio Hospital, USL Centro Toscana, Florence, Italy
| | - Mateusz Krzyzinski
- Faculty of Mathematics and Information Science, Warsaw University of Technology, Warsaw, Poland
| | - Monika Dudzisz-Sledz
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland
| | - Przemyslaw Biecek
- Faculty of Mathematics and Information Science, Warsaw University of Technology, Warsaw, Poland
| | - Piotr Rutkowski
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland
| | - Andrzej Marszalek
- Department of Pathology, Poznan University Medical Sciences and Greater Poland Cancer Center, Poznan, Poland
| | - Mai P Hoang
- Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, USA
| | - Piotr Donizy
- Department of Clinical and Experimental Pathology, Wroclaw Medical University, Borowska 213, 50-556, Wroclaw, Poland.
- Department of Pathology and Clinical Cytology, Jan Mikulicz-Radecki University Hospital, Wroclaw, Poland.
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5
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Möller K, Uhlig R, Gorbokon N, Dum D, Menz A, Büscheck F, Luebke AM, Hube-Magg C, Hinsch A, Höflmayer D, Fraune C, Lebok P, Weidemann S, Lennartz M, Jacobsen F, Clauditz TS, Steurer S, Burandt E, Krech R, Krech T, Marx AH, Sauter G, Simon R, Bernreuther C, Minner S. Comparison of INSM1 immunostaining with established neuroendocrine markers synaptophysin and chromogranin A in over 14,000 neuroendocrine and non-neuroendocrine tumors. Mol Cell Endocrinol 2024; 581:112106. [PMID: 37951531 DOI: 10.1016/j.mce.2023.112106] [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: 06/12/2023] [Revised: 10/04/2023] [Accepted: 11/03/2023] [Indexed: 11/14/2023]
Abstract
INSM1 is a transcription factor protein which is increasingly used as an immunohistochemical marker for neuroendocrine differentiation. To determine the prevalence of INSM1 expression in tumors and its expression pattern in normal tissues, tissue microarrays containing 14,908 samples from 117 different tumor types/subtypes as well as 76 different normal tissues were analyzed by immunohistochemistry. INSM1 was positive in 89.2% of 471 neuroendocrine neoplasms (NEN) and in 3.5% of 11,815 non-neuroendocrine neoplasms that were successfully analyzed. At least an occasional weak INSM1 positivity was observed in 59 different non-neuroendocrine tumor entities, of which 15 entities contained at least one case with strong INSM1 staining. A comparison with synaptophysin and chromogranin A staining revealed that in NEN, synaptophysin showed the highest sensitivity (93.3%), followed by INSM1 (89.2%) and chromogranin A (87.5%). In neuroendocrine carcinomas (NEC), sensitivity was highest for INSM1 (88.0%), followed by synaptophysin (86.5%) and chromogranin A (66.4%). If INSM1 was used as an additional marker, the sensitivity for detecting neuroendocrine differentiation in NEN increased from 96.6% (synaptophysin and chromogranin A) to 97.2% (synaptophysin, chromogranin A and INSM1). Our study shows that INSM1 is a useful additional marker for neuroendocrine differentiation with high sensitivity, particularly in NEC.
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Affiliation(s)
- Katharina Möller
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ria Uhlig
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Natalia Gorbokon
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - David Dum
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Anne Menz
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Franziska Büscheck
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Andreas M Luebke
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Claudia Hube-Magg
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Andrea Hinsch
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Doris Höflmayer
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christoph Fraune
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Patrick Lebok
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Institute of Pathology, Clinical Center Osnabrueck, Osnabrueck, Germany
| | - Sören Weidemann
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Maximilian Lennartz
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Frank Jacobsen
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Till S Clauditz
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Stefan Steurer
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Eike Burandt
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Rainer Krech
- Institute of Pathology, Clinical Center Osnabrueck, Osnabrueck, Germany
| | - Till Krech
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Institute of Pathology, Clinical Center Osnabrueck, Osnabrueck, Germany
| | - Andreas H Marx
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Department of Pathology, Academic Hospital Fuerth, Fuerth Germany
| | - Guido Sauter
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ronald Simon
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
| | - Christian Bernreuther
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Sarah Minner
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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6
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Mandl A, Jasmine S, Krueger T, Kumar R, Coleman IM, Dalrymple SL, Antony L, Rosen DM, Jing Y, Hanratty B, Patel RA, Jin-Yih L, Dias J, Celatka CA, Tapper AE, Kleppe M, Kanayama M, Speranzini V, Wang YZ, Luo J, Corey E, Sena LA, Casero RA, Lotan T, Trock BJ, Kachhap SK, Denmeade SR, Carducci MA, Mattevi A, Haffner MC, Nelson PS, Rienhoff HY, Isaacs JT, Brennen WN. LSD1 inhibition suppresses ASCL1 and de-represses YAP1 to drive potent activity against neuroendocrine prostate cancer. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.01.17.576106. [PMID: 38328141 PMCID: PMC10849473 DOI: 10.1101/2024.01.17.576106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
Lysine-specific demethylase 1 (LSD1 or KDM1A ) has emerged as a critical mediator of tumor progression in metastatic castration-resistant prostate cancer (mCRPC). Among mCRPC subtypes, neuroendocrine prostate cancer (NEPC) is an exceptionally aggressive variant driven by lineage plasticity, an adaptive resistance mechanism to androgen receptor axis-targeted therapies. Our study shows that LSD1 expression is elevated in NEPC and associated with unfavorable clinical outcomes. Using genetic approaches, we validated the on-target effects of LSD1 inhibition across various models. We investigated the therapeutic potential of bomedemstat, an orally bioavailable, irreversible LSD1 inhibitor with low nanomolar potency. Our findings demonstrate potent antitumor activity against CRPC models, including tumor regressions in NEPC patient-derived xenografts. Mechanistically, our study uncovers that LSD1 inhibition suppresses the neuronal transcriptional program by downregulating ASCL1 through disrupting LSD1:INSM1 interactions and de-repressing YAP1 silencing. Our data support the clinical development of LSD1 inhibitors for treating CRPC - especially the aggressive NE phenotype. Statement of Significance Neuroendocrine prostate cancer presents a clinical challenge due to the lack of effective treatments. Our research demonstrates that bomedemstat, a potent and selective LSD1 inhibitor, effectively combats neuroendocrine prostate cancer by downregulating the ASCL1- dependent NE transcriptional program and re-expressing YAP1.
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7
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Wang XQ, Fu J, Zhang YT, Xu Y. INSM1 expression in primary and metastatic neuroendocrine neoplasms at distinct locations. Pathol Res Pract 2024; 253:155067. [PMID: 38171081 DOI: 10.1016/j.prp.2023.155067] [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: 07/29/2023] [Revised: 10/07/2023] [Accepted: 12/27/2023] [Indexed: 01/05/2024]
Abstract
BACKGROUND Insulinoma-associated protein 1 (INSM1) has been reported as a valuable marker for neuroendocrine neoplasms (NENs). The aims of this study were to evaluate any change in INSM1 expression between primary and metastatic NENs in distinct locations, as well as the expression of INSM1 at different differentiation levels. Furthermore, we would also investigate the significance of INSM1 expression in non-neuroendocrine neoplasms (non-NENs). METHODS We collected 78 cases with primary NENs and 16 cases with metastatic NENs. An addition 7 cases of non-NENs with neuroendocrine (NE) differentiation and 84 cases of other non-NENs, respectively, were included as controls. RESULTS In our cohort, 82% of primary NENs and 88% of metastatic NENs expressed INSM1 with no difference between them. There was no difference in the expression of INSM1 in the lung and digestive system, and its staining pattern was independent of tumor differentiation or location. The proportion of INSM1 -positive in non-NENs with NE differentiation was significantly higher than that in other non-NENs. INSM1 sensitivity for primary NENs (82%) was comparable to Chromogranin A (82%), less than that of Synaptophysin (96%) and CD56 (94%); specificity was higher (96% vs 94%, 82%, and 89%, respectively). The sensitivity of INSM1 for well differentiated NENs was significantly higher than that of poorly differentiated NENs (100% vs 79%). CONCLUSIONS INSM1 is a useful neuroendocrine marker in primary and metastatic NENs, helping to identify primary NENs with different degrees of differentiation. The expression of INSM1 was independent of tumor location. It should be with caution to interpret the expression of INSM1 in non-NENs that morphologically resemble NENs.
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Affiliation(s)
- Xiao-Qing Wang
- Department of Pathology, Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, China.
| | - Jing Fu
- Department of Pathology, Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, China
| | - Yi-Tong Zhang
- Department of Pathology, Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, China
| | - Ying Xu
- Department of Pathology, Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, China
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8
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Hirokawa Y, Inomoto C, Oyama K, Tahara S, Y. Osamura R, Shiomi T, Matsuno A. Analysis of Insulinoma-Associated Protein 1 Expression in Pituitary Neuroendocrine Tumors. Acta Histochem Cytochem 2023; 56:105-110. [PMID: 38318099 PMCID: PMC10838629 DOI: 10.1267/ahc.23-00033] [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: 05/14/2023] [Accepted: 10/09/2023] [Indexed: 02/07/2024] Open
Abstract
Insulinoma-associated protein 1 (INSM1) is a representative diagnostic marker of neuroendocrine neoplasms (NENs); however, it has not yet been used to diagnose pituitary neuroendocrine tumors (PitNETs), according to the 2022 World Health Organization (WHO) classification of pituitary tumors. This study aimed to examine the expression of INSM1 using immunohistochemistry, in the various cell lineages of PitNET classified by hormone secretion and transcription factor expression. INSM1 expression in PitNETs (different subtypes) and normal pituitary tissues was immunohistochemically assessed. The results were interpreted as scores of 0 (negative), 1 (focally positive), or 2 (frankly positive), depending on the proportion of cell staining. Twenty-eight of 35 PitNET cases (80%) showed INSM1 positivity in their nuclei. The staining in each histological subtype of PitNETs was as follows: somatotroph tumors, score 0 = 3/5, score 1 = 1/5, score 2 = 1/5; lactotroph tumors, score 0 = 2/5, score 1 = 1/5, score 2 = 2/5; thyrotroph tumors, score 2 = 5/5; corticotroph tumors: score 1 = 1/9, score 2 = 8/9; gonadotroph tumors, score 0 = 2/10, score 1 = 0/10, score 2 = 8/10; and unclassifiable tumor, score 1 = 1/1. INSM1 expression in most PitNETs was obtained, similar to that in the normal pituitary gland; thus, INSM1 may maintain the characteristics of anterior pituitary cells and pituitary tumors.
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Affiliation(s)
- Yu Hirokawa
- Department of Neurosurgery, International University of Health and Welfare, Narita Hospital, Chiba, Japan
- Graduate School of Medicine, International University of Health and Welfare, Chiba, Japan
| | - Chie Inomoto
- Department of Pathology, School of Medicine, Tokai University, Kanagawa, Japan
| | - Kenichi Oyama
- Department of Neurosurgery, International University of Health and Welfare, Mita Hospital, Tokyo, Japan
| | - Shigeyuki Tahara
- Department of Neurological Surgery, Nippon Medical School, Tokyo, Japan
| | - Robert Y. Osamura
- Department of Diagnostic Pathology, Nippon Koukan Hospital, Kanagawa, Japan
| | - Takayuki Shiomi
- Graduate School of Medicine, International University of Health and Welfare, Chiba, Japan
- Department of Pathology, International University of Health and Welfare, Narita Hospital, Chiba, Japan
| | - Akira Matsuno
- Department of Neurosurgery, International University of Health and Welfare, Narita Hospital, Chiba, Japan
- Graduate School of Medicine, International University of Health and Welfare, Chiba, Japan
- Department of Neurosurgery, International University of Health and Welfare, Mita Hospital, Tokyo, Japan
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9
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Baruah RM, Ghosh A, Baishya S. Sinonasal Neuroendocrine Carcinoma: A Case report. Indian J Otolaryngol Head Neck Surg 2023; 75:4003-4006. [PMID: 37974789 PMCID: PMC10645772 DOI: 10.1007/s12070-023-04026-3] [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: 02/19/2023] [Accepted: 06/23/2023] [Indexed: 11/19/2023] Open
Abstract
Neuroendocrine carcinoma are rare tumor which begin in specialized cells called neuroendocrine cells. It can occur anywhere in the body. Most neuroendocrine tumors occur in the lungs, appendix, small intestine, rectum and pancreas. We reported a case of sinonasal neuroendocrine carcinoma in a 65 year old lady who had presented with a history of right nasal obstruction, bloody nasal discharge, and recurrent epistaxis. On examination, a red, friable, polypoid mass with a tendency to bleed was seen in the right nasal cavity. Computed tomography revealed there was a enhancing expansile necrotic mass in right nasal cavity abutting the medial nasal wall. There was presence of mucosal thickening with inspissated secretion in all sinuses except left maxillary sinus. The patient underwent endoscopic removal of the tumour. Biopsy revealed poorly differentiated carcinoma of right nasal cavity. Immunohistochemistry revealed small cell neuroendocrine carcinoma. After that, the patient had postoperative external radiation treatment with a 6600 cGy dosage administered over 33 fractions. The patient had routine follow-up at the radiation oncology and otolaryngology outpatient departments throughout a 12-month period. During the postoperative month-to-month follow-up, there was no evidence of a local tumour recurrence in the endoscopy.
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Affiliation(s)
| | - Avinava Ghosh
- Guwahati Ear and Sinus Center, Chikitsa Clinic, Assam Trunk Rd, Adabari Tiniali, Pandu, Guwahati, Assam 781012 India
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10
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AL-Zaidi RS. Teratocarcinosarcoma of the head and neck: Clinicopathologic review of a rare entity. Rare Tumors 2023; 15:20363613231204047. [PMID: 37743905 PMCID: PMC10515544 DOI: 10.1177/20363613231204047] [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: 04/12/2023] [Accepted: 09/07/2023] [Indexed: 09/26/2023] Open
Abstract
Teratocarcinosarcoma is a rare, highly aggressive malignancy of the head and neck, characterized by multiphenotypic and triphasic growth of epithelial, mesenchymal, and primitive neuroepithelial elements. Owing to its rarity and morphological heterogeneity, as well as the lack of experience with this neoplasm, teratocarcinosarcoma is often misdiagnosed, particularly in small biopsy samples when only some of the elements are identified, thus leading to delayed management. Aggressive clinical behavior and poor survival outcomes, necessitate an accurate diagnosis and appropriate treatment. This review describes the main demographic and clinicopathological features of teratocarcinosarcoma, with an emphasis on the recent advances that have attempted to identify the molecular signature of this neoplasm.
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Affiliation(s)
- Rana S. AL-Zaidi
- Anatomic Pathology Section, Department of Laboratory and Blood Bank, King Faisal Hospital, Makkah, Saudi Arabia
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11
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Rooper LM. Proceedings of the 2023 North American Society of Head and Neck Pathology Companion Meeting, New Orleans, LA, March 12, 2023: Navigating New Developments in High Grade Sinonasal Neuroendocrine and Neuroectodermal Neoplasms. Head Neck Pathol 2023; 17:299-312. [PMID: 37184733 PMCID: PMC10293143 DOI: 10.1007/s12105-023-01548-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 03/18/2023] [Indexed: 05/16/2023]
Abstract
Although the definitions of sinonasal neuroendocrine and neuroectodermal neoplasms did not change substantially in the 5th edition WHO Classification of Head and Neck Tumours, the diagnosis of olfactory neuroblastoma (ONB), small cell neuroendocrine carcinoma, and large cell neuroendocrine carcinoma remains quite challenging in practice. Ambiguities surrounding the amount of keratin expression allowable in ONB and the amount of neuroendocrine differentiation seen in sinonasal undifferentiated carcinoma (SNUC) lead to significant diagnostic discrepancies at the high grade end of this tumor spectrum. Furthermore, a group of problematic neuroepithelial tumors that show overlapping features of ONB and neuroendocrine carcinoma have never been recognized in formal classification schemes. Since publication of the 5th edition WHO, two new tumor entities have been proposed that help resolve these problems. Olfactory carcinoma is defined by high grade keratin-positive neuroectodermal cells with frequent intermixed glands and shows recurrent Wnt pathway, ARID1A, and RUNX1 alterations. IDH2-mutant sinonasal carcinoma is a molecularly-defined category that encompasses tumors with undifferentiated (SNUC), large cell neuroendocrine, and neuroepithelial phenotypes. This review will provide a practical overview of these emerging entities and their application to diagnostic challenges in the post-WHO sinonasal neuroendocrine and neuroectodermal tumor classification.
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Affiliation(s)
- Lisa M Rooper
- Department of Pathology, The Johns Hopkins University School of Medicine, 401 N. Broadway, Weinberg 2242, Baltimore, MD, 21231, USA.
- Department of Oncology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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12
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Zunitch MJ, Fisch AS, Lin B, Barrios-Camacho CM, Faquin WC, Tachie-Baffour Y, Louie JD, Jang W, Curry WT, Gray ST, Lin DT, Schwob JE, Holbrook EH. Molecular Evidence for Olfactory Neuroblastoma as a Tumor of Malignant Globose Basal Cells. Mod Pathol 2023; 36:100122. [PMID: 36841178 PMCID: PMC10198888 DOI: 10.1016/j.modpat.2023.100122] [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: 10/17/2022] [Revised: 01/20/2023] [Accepted: 01/27/2023] [Indexed: 02/05/2023]
Abstract
Olfactory neuroblastoma (ONB, esthesioneuroblastoma) is a sinonasal cancer with an underdeveloped diagnostic toolkit, and is the subject of many incidents of tumor misclassification throughout the literature. Despite its name, connections between the cancer and normal cells of the olfactory epithelium have not been systematically explored and markers of olfactory epithelial cell types are not deployed in clinical practice. Here, we utilize an integrated human-mouse single-cell atlas of the nasal mucosa, including the olfactory epithelium, to identify transcriptomic programs that link ONB to a specific population of stem/progenitor cells known as olfactory epithelial globose basal cells (GBCs). Expression of a GBC transcription factor NEUROD1 distinguishes both low- and high-grade ONB from sinonasal undifferentiated carcinoma, a potential histologic mimic with a distinctly unfavorable prognosis. Furthermore, we identify a reproducible subpopulation of highly proliferative ONB cells expressing the GBC stemness marker EZH2, suggesting that EZH2 inhibition may play a role in the targeted treatment of ONB. Finally, we study the cellular states comprising ONB parenchyma using single-cell transcriptomics and identify evidence of a conserved GBC transcriptional regulatory circuit that governs divergent neuronal-versus-sustentacular differentiation. These results link ONB to a specific cell type for the first time and identify conserved developmental pathways within ONB that inform diagnostic, prognostic, and mechanistic investigation.
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Affiliation(s)
- Matthew J Zunitch
- Medical Scientist Training Program, Tufts University School of Medicine, Boston, Massachusetts; Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts
| | - Adam S Fisch
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Brian Lin
- Center for Regenerative Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | | | - William C Faquin
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Yaw Tachie-Baffour
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts
| | - Jonathan D Louie
- Medical Scientist Training Program, Tufts University School of Medicine, Boston, Massachusetts; Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts
| | - Woochan Jang
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts
| | - William T Curry
- Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Stacey T Gray
- Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts
| | - Derrick T Lin
- Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts
| | - James E Schwob
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts; Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts.
| | - Eric H Holbrook
- Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts.
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Almajnooni A, Vega M, Cheng L, Gattuso P, Allen-Proctor MK. Middle ear adenoma: Cytohistologic features and differential diagnosis. Diagn Cytopathol 2023; 51:E137-E141. [PMID: 36688374 DOI: 10.1002/dc.25103] [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: 10/07/2022] [Revised: 12/12/2022] [Accepted: 12/27/2022] [Indexed: 01/24/2023]
Abstract
Middle ear adenomas are rare, low grade glandular neoplasms with epithelial and neuroendocrine components and with varying patterns of differentiation. Due to the rarity of this tumor, there is a dearth of publications detailing the cytological features. We herein review our institution's pathological database for cytological material between 1992 and 2022 for MEA specimens and discuss possible differential diagnoses based on clinical, pathological, and cytologic data and material.
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Affiliation(s)
- Abdullah Almajnooni
- Department of Pathology, Rush University Medical Center, Chicago, Illinois, USA
| | - Matthew Vega
- Department of Pathology, Rush University Medical Center, Chicago, Illinois, USA
| | - Lin Cheng
- Department of Pathology, Rush University Medical Center, Chicago, Illinois, USA
| | - Paolo Gattuso
- Department of Pathology, Rush University Medical Center, Chicago, Illinois, USA
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14
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Juhlin CC, Bal M. Top 10 Histological Mimics of Neuroendocrine Carcinoma You Should Not Miss in the Head and Neck. Head Neck Pathol 2023; 17:66-84. [PMID: 36941503 PMCID: PMC10063750 DOI: 10.1007/s12105-022-01521-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 12/10/2022] [Indexed: 03/23/2023]
Abstract
BACKGROUND The spectrum of neuroendocrine neoplasia (NEN) of the head and neck region is wide-ranging and diverse, including a variety of diagnoses stretching from benign and low-malignant tumor forms to highly proliferative, poor prognosis neuroendocrine carcinoma (NEC). Moreover, there are several non-neuroendocrine differential diagnoses to keep in mind as well, displaying various degree of morphological and/or immunohistochemical overlap with bona fide neuroendocrine lesions. METHODS Review. RESULTS While the growth patterns may vary, well-differentiated NEN usually display a stippled "salt and pepper" chromatin, a granular cytoplasm, and unequivocal expression of neuroendocrine markers such as chromogranin A and synaptophysin. However, these features are often less pronounced in NEC, which may cause diagnostic confusion-not the least since several non-NEC head and neck tumors may exhibit morphological similarities and focal neuroendocrine differentiation. CONCLUSION As patients with NEC may require specific adjuvant treatment and follow-up, knowledge regarding differential diagnoses and potential pitfalls is therefore clinically relevant. In this review, the top ten morphological and/or immunohistochemical mimics of NEC are detailed in terms of histology, immunohistochemistry, and molecular genetics.
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Affiliation(s)
- C Christofer Juhlin
- Department of Oncology-Pathology, BioClinicum J6:20, Karolinska Institutet, Solna, 171 64, Stockholm, Sweden.
- Department of Pathology and Cancer Diagnostics, Karolinska University Hospital, Stockholm, Sweden.
| | - Munita Bal
- Department of Pathology, Tata Memorial Centre, Homi Bhabha National Institute, Mumbai, 400012, India.
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Baněčková M, Cox D. Top 10 Basaloid Neoplasms of the Sinonasal Tract. Head Neck Pathol 2023; 17:16-32. [PMID: 36928732 PMCID: PMC10063752 DOI: 10.1007/s12105-022-01508-8] [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: 10/19/2022] [Accepted: 10/28/2022] [Indexed: 03/18/2023]
Abstract
BACKGROUND Basaloid neoplasms of the sinonasal tract represent a significant group of tumors with histological overlap but often with different etiologies (i.e., viral, genetics), clinical management, and prognostic significance. METHODS Review. RESULTS "Basaloid" generally refers to cells with coarse chromatin in round nuclei and sparse cytoplasm, resembling cells of epithelial basal layers or imparting an "immature" appearance. Tumors with this characteristic in the sinonasal tract are represented by a spectrum of benign to high-grade malignant neoplasms, such as adenoid cystic carcinoma, NUT carcinoma, sinonasal undifferentiated carcinoma, SWI/SNF complex-deficient carcinomas, and adamantinoma-like Ewing sarcoma. CONCLUSION In some instances, histology alone may be sufficient for diagnosis. However, limited biopsy material or fine-needle aspiration specimens may be particularly challenging. Therefore, often other diagnostic procedures, including a combination of histology, immunohistochemistry (IHC), DNA and RNA testing, and molecular genetics are necessary to establish an accurate diagnosis.
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Affiliation(s)
- Martina Baněčková
- Department of Pathology, Faculty of Medicine in Plzen, Charles University, Plzen, Czech Republic.
- Bioptic Laboratory Ltd, Plzen, Czech Republic.
- Sikl's Department of Pathology, Faculty of Medicine in Pilsen, Charles University, E. Benese 13, 305 99, Pilsen, Czech Republic.
| | - Darren Cox
- University of Pacific Arthur A. Dugoni School of Dentistry, San Francisco, CA, USA
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Roy D, Sriram S, Kakkar A, Kumar R, Kaur K, Jain D, Sharma A, Thakar A. Cytological diagnosis of olfactory neuroblastoma at metastatic sites, with emphasis on role of insulinoma-associated protein 1 immunocytochemistry. Diagn Cytopathol 2023; 51:146-152. [PMID: 36369994 DOI: 10.1002/dc.25074] [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: 08/23/2022] [Revised: 10/21/2022] [Accepted: 10/27/2022] [Indexed: 11/15/2022]
Abstract
BACKGROUND Olfactory neuroblastoma (ONB) is a rare neuroectodermal tumor with a propensity for lymph node and distant metastases in a proportion of cases, presenting opportunities for cytological diagnosis. Insulinoma-associated protein 1 (INSM1) is a recently identified marker of neuroendocrine differentiation with higher sensitivity and specificity than traditional neuroendocrine immunostains used in diagnosis of ONB. METHODS Archival aspirates diagnosed as metastatic ONB were retrieved and reviewed for described characteristics of ONB. Spare direct smears with sufficient cellular material from each case were selected, if available, and immunocytochemistry for INSM1 was performed on the destained alcohol-fixed smears. INSM1 was also performed on non-neuroendocrine malignant round cell tumors (MRCT). RESULTS Seven fine needle aspirates (FNA) from five patients were identified, all of which showed a small round cell tumor with fine to coarse granular chromatin. Most cases had moderate to high cellularity, comprised of loosely cohesive clusters and dispersed cells. While two-cell pattern, nuclear streaking and moulding were frequent, background neuropil, fibrillary cytoplasm, and rosettes were uncommon. INSM1 immunostaining performed on spare direct smears showed strong positivity in 30%-100% of tumor cells (mean: 62%) in all aspirates tested (100%). In comparison with other immunostains, INSM1 showed more robust staining, and was easier to interpret. All non-neuroendocrine MRCTs were negative for INSM1. CONCLUSION Metatstatic ONB can resemble other small round cell tumors, as all the diagnostic features of ONB may not be readily evident. INSM1 immunocytochemistry has high sensitivity and specificity and can reliably be used as a single marker to support the cytomorphology for a confirmatory diagnosis of ONB, even on direct smears if a cell block is not available.
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Affiliation(s)
- Diya Roy
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - Sanjay Sriram
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - Aanchal Kakkar
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - Rajeev Kumar
- Department of Otorhinolaryngology and Head & Neck Surgery, All India Institute of Medical Sciences, New Delhi, India
| | - Kavneet Kaur
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - Deepali Jain
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - Atul Sharma
- Department of Medical Oncology, All India Institute of Medical Sciences, New Delhi, India
| | - Alok Thakar
- Department of Otorhinolaryngology and Head & Neck Surgery, All India Institute of Medical Sciences, New Delhi, India
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Brzezinska KA, Bhardwaj S, Teng MS, Si Q, Sun J, Westra WH, Zakowski MF, Szporn AH. Melanotic medullary thyroid carcinoma: A case report with review of the literature. Diagn Cytopathol 2023; 51:E14-E20. [PMID: 36056712 DOI: 10.1002/dc.25048] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 08/18/2022] [Accepted: 08/18/2022] [Indexed: 12/13/2022]
Abstract
Melanotic medullary thyroid carcinoma is morphologically defined by the presence of melanin deposits in the cytoplasm of tumor cells. It is an extremely rare variant with only 15 cases described in the literature to date and only one report of diagnosis by fine needle aspiration (FNA) biopsy. A 51-year-old woman presented with neck swelling. An ultrasound examination revealed a single solid nodule in the right thyroid lobe that measured 5.4 × 4.7 × 4.3 cm. Laboratory examination revealed elevated levels of serum calcitonin (8643.0 pg/ml), carcinoembryonic antigen (CEA) (86.2 ng/ml), and chromogranin A (123.2 ng/ml). An FNA biopsy of the thyroid nodule revealed predominantly single plasmacytoid cells with round to oval eccentric nuclei and dark brown intracytoplasmic granules. Immunohistochemical studies with Melan-A performed on a cell block slide confirmed that the granules contained melanin. The tumor cells were also positive for calcitonin, CEA, synaptophysin, AE1/AE3, CAM5.2, and HMB-45(focal); the tumor cells were negative for chromogranin, thyroglobulin, PAX8 and TTF-1. The diagnosis was reported as melanotic variant of medullary thyroid carcinoma. The patient underwent a total thyroidectomy which revealed tumor cell expression of insulinoma-associated protein 1 and confirmed neuroendocrine differentiation. Shortly after she presented with tumor recurrence in the thyroidectomy bed. The tumor cells were positive for only S100, SOX10, and Melan-A. Molecular analysis with the SEMA4 Solid Tumor Panel revealed mutations in the HRAS, PIK3CA, PIK3R1, MYC, and CCND3 genes. The final diagnosis was reported as melanocytic medullary thyroid carcinoma with high grade transformation and loss of epithelial and neuroendocrine expression.
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Affiliation(s)
| | - Swati Bhardwaj
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Marita S Teng
- Department of Otolaryngology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Qiusheng Si
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jihong Sun
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - William H Westra
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Maureen F Zakowski
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Arnold H Szporn
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Weissferdt A, Sepesi B, Ning J, Hermsen M, Ferrarotto R, Glisson B, Hanna E, Bell D. Optimal Combination of Neuroendocrine Markers for the Detection of High-Grade Neuroendocrine Tumors of the Sinonasal Tract and Lung. Curr Oncol Rep 2023; 25:1-10. [PMID: 36422794 DOI: 10.1007/s11912-022-01346-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/19/2022] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW Identification of neuroendocrine (NE) differentiation is critical to the classification of head and neck (HN) and lung tumors. In combination with tumor morphology, immunohistochemical (IHC) documentation of NE differentiation is necessary for the diagnosis of NE tumors. The purpose of this study is to determine the sensitivity and concordance of two novel NE markers (mASH1, INSM1) across a group of high-grade NE tumors of the sinonasal tract and lung, and to compare their expression with the current widespread use of conventional NE markers, synaptophysin (SYN) and chromogranin A (CGA). In addition, expression of PARP1 is examined as a potential novel therapeutic target. RECENT FINDINGS Thirty-nine high-grade NE tumors, 23 of the HN and 16 of the lung, were reevaluated by two subspecialized HN and thoracic pathologists, and subsequently stained with mASH1, INSM1, and PARP1. Sensitivity and degree of concordance of all possible combinations of markers were assessed. Sensitivities (standard error) were as follows: mASH1 41% (0.08), INSM1 44% (0.08), SYN 56% (0.08), and CGA 42% (0.09); combination of all four NE markers: 73% (0.08). Sensitivity and standard error for PARP1 was 90% and 0.05, respectively. Highest sensitivity to detect NE differentiation in high-grade NE tumors of the HN and thoracic region was achieved with a combination of four NE markers. Moderate concordance was found with combinations of mASH1 and INSM1 and traditional NE markers, respectively. Consistent overexpression of PARP1 in high-grade tumors with NE differentiation in the HN and lung opens eligibility for PARP1 inhibitor trials.
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Affiliation(s)
- Annikka Weissferdt
- Department of Pathology, MD Anderson Cancer Center, Houston, TX, USA.,Department of Thoracic Surgery, MD Anderson Cancer Center, Houston, TX, USA
| | - Boris Sepesi
- Department of Thoracic Surgery, MD Anderson Cancer Center, Houston, TX, USA
| | - Jing Ning
- Department of Biostatistics, MD Anderson Cancer Center, Houston, TX, USA
| | - Mario Hermsen
- Head and Neck Oncology, University Hospital of Oviedo, Oviedo, Spain
| | - Renata Ferrarotto
- Department of Head and Neck/Thoracic Medical Oncology, MD Anderson Cancer Center, Houston, TX, USA
| | - Bonnie Glisson
- Department of Head and Neck/Thoracic Medical Oncology, MD Anderson Cancer Center, Houston, TX, USA
| | - Ehab Hanna
- Department of Head and Neck Surgery, MD Anderson Cancer Center, Houston, TX, USA
| | - Diana Bell
- Department of Pathology and Head and Neck Disease Team Alignment, City of Hope Comprehensive Cancer Center, Duarte, CA, 91010, USA.
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Distinctive Nested Glomoid Neoplasm: Clinicopathologic Analysis of 20 Cases of a Mesenchymal Neoplasm With Frequent GLI1 Alterations and Indolent Behavior. Am J Surg Pathol 2023; 47:12-24. [PMID: 36395474 DOI: 10.1097/pas.0000000000001979] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Recently, it has been recognized that a subset of primary soft tissue neoplasms with GLI1 gene alterations exhibit nested architecture and can mimic glomus tumors or well-differentiated neuroendocrine tumors. Here, we report a series of 20 such neoplasms, which we have provisionally termed "distinctive nested glomoid neoplasm." Eleven patients (55%) were female and 9 were male. The median age at presentation was 41.5 years (range: congenital to 74 y). The anatomic distribution was wide, with body sites including the trunk (7 tumors), lower extremity (5), tongue (4), upper extremity (3), and neck (1). Excluding tumors of the tongue, 10 tumors (62%) arose in deep soft tissue and 6 (38%) arose primarily in the subcutis. Tumor size ranged from 0.9 to 11.1 cm (median: 3 cm). Distinctive nested glomoid neoplasms are composed of nests of round-to-ovoid cells with scant, palely eosinophilic cytoplasm and monomorphic nuclei with vesicular chromatin and small nucleoli. The nests are invested by prominent capillary networks, and they are situated within large lobules separated by irregular, thick fibrous septa. Among 18 tumors for which adjacent non-neoplastic tissue could be assessed, perivascular proliferation of tumor cells was identified in 16 tumors (89%). Microcystic architecture was present at least focally in 8 tumors (40%), and myxoid stroma was identified at least focally in 5 (25%). Seven tumors (35%) showed clear cell features. By immunohistochemistry, some tumors expressed MDM2 (7/15; 47%), S100 (5 of 19; 26%), STAT6 (2 of 5; 20%), and AE1/AE3 (1/5; 20%). Tumors rarely expressed pan-keratin (1/10; 10%) or CAM5.2 (1/10), and all tumors were negative for β-catenin (12 tumors), chromogranin (12), synaptophysin (11), epithelial membrane antigen (10), desmin (10), smooth muscle actin (9), INSM1 (7), and CD34 (6). GLI1 break-apart fluorescence in situ hybridization was performed on 7 tumors, and next-generation sequencing was performed on 15 tumors (10 DNA sequencing only, 1 RNA sequencing only, 4 both DNA and RNA sequencing). Sixteen tumors, including all 15 tested by next-generation sequencing and an additional case tested by fluorescence in situ hybridization only, were found to harbor GLI1 gene alterations: 10 harbored GLI1 gene rearrangements (3 ACTB :: GLI1 , 2 PTCH1 :: GLI1 , 1 HNRNPA1 :: GLI1 , 1 NEAT1 :: GLI1 , 1 TXNIP :: GLI1 , 2 undetermined fusion partners), and 6 harbored GLI1 amplification. Clinical follow-up was available for 10 patients (50%; range: 3 mo to 10 y; median: 6.4 y), including 8 with >1 year of follow-up. Three patients (30%) experienced local recurrence (at intervals of 3 mo to 10 y). None developed distant metastases or died of disease as yet. Overall, our findings support the notion that a subset of GLI1 -altered soft tissue neoplasms are indolent, morphologically distinctive nested glomoid neoplasms that should not be classified as sarcomas.
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Zhang Q, Dong Y, Zhou M, Guo Y, Lou L, Qu Z, Zheng Y, Duan Y. INSM1 Expression in Mesenchymal Tumors and Its Clinicopathological Significance. BIOMED RESEARCH INTERNATIONAL 2022; 2022:1580410. [PMID: 36531655 PMCID: PMC9750778 DOI: 10.1155/2022/1580410] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 11/03/2022] [Accepted: 11/17/2022] [Indexed: 04/11/2024]
Abstract
BACKGROUND Insulinoma-associated protein 1 (INSM1) has been identified as a nuclear marker of neuroendocrine tumors. Although INSM1 appears to be a subtle and specific biomarker for neuroendocrine tumor, its expression and clinicopathological significance in mesenchymal tumors remain unclear. METHODS We analyzed INSM1 mRNA level in GEO database and conducted immunohistological staining to detect the expression of INSM1 on 576 mesenchymal tumors from pathology department of Tongji Hospital. RESULTS At transcription level, INSM1 expression in AITL (angioimmunoblastic T-cell lymphoma) was higher than their adjacent normal tissues as well as Hodgkin's lymphoma. Moreover, INSM1 expression in well-differentiated liposarcoma (WDLPS) was significantly higher than normal fat (P = 0.014) and dedifferentiated liposarcoma (DDLPS) (P = 0.0248). At protein level, the positive rate of INSM1 in AITL was 18/48 (47.4%), while in DDLPS was 9/20 (45%). INSM1 expression in AITL was significantly higher than Hodgkin's lymphoma (P = 0.008). And INSM1 expression in WDLPS was significantly lower than DDLPS (P = 0.015). CONCLUSION The combination of GEO data and immunohistochemistry data indicated that the expression level of INSM1 was higher in AITL compared with normal control, suggesting that INSM1 may be involved in pathogenesis of AITL. The abnormal expression of INSM1 was found in WDLPS, and the positive rate of INSM1 was higher in DDLPS than in WDLPS. INSM1 may be involved in the regulation of liposarcoma development. There were significant differences in the expression of INSM1 between AITL and Hodgkin's lymphoma and WDLPS and DDLPS. These findings may assist in the differential diagnosis of these tumors when common markers are difficult to identify, enriching the diagnostic index system of mesenchymal tumors.
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Affiliation(s)
- Qian Zhang
- Institute of Pathology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430000, China
- Department of Pathology, School of Basic Medical Science, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Yuting Dong
- Institute of Pathology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430000, China
- Department of Pathology, School of Basic Medical Science, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Meidong Zhou
- Institute of Pathology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Yujuan Guo
- Institute of Pathology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430000, China
- Department of Pathology, School of Basic Medical Science, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Liping Lou
- Institute of Pathology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Zhiling Qu
- Institute of Pathology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430000, China
- Department of Pathology, School of Basic Medical Science, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Yiyun Zheng
- Institute of Pathology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430000, China
- Department of Pathology, School of Basic Medical Science, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Yaqi Duan
- Institute of Pathology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430000, China
- Department of Pathology, School of Basic Medical Science, Huazhong University of Science and Technology, Wuhan 430000, China
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Kashima J, Hashimoto T, Yoshida A, Goto Y, Ushiku T, Ohe Y, Watanabe SI, Yatabe Y. Insulinoma-associated-1 (INSM1) expression in thymic squamous cell carcinoma. Virchows Arch 2022; 481:893-901. [PMID: 36305944 DOI: 10.1007/s00428-022-03437-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 10/05/2022] [Accepted: 10/17/2022] [Indexed: 12/14/2022]
Abstract
Thymic squamous cell carcinoma (TSC) presents distinct immunohistochemical features with its expression of CD5 and CD117, both of which are rarely expressed in squamous cell carcinoma in other organs. We found insulinoma-associated-1 (INSM1) expression in some TSCs; thus, a series of thymic tumors were examined retrospectively. Using surgically resected thymic tumors (TSC, n = 35; thymic atypical carcinoid [TAC], n = 4; and thymoma, n = 112) and non-neoplastic thymic tissue (n = 26), we evaluated immunohistochemically the expressions of INSM1, ASCL1, SOX2, NE markers (synaptophysin, chromogranin A, and CD56), and conventional TSC markers (CD5 and CD117). INSM1 was expressed in 22 TSCs (63%), whereas the positive frequencies of synaptophysin, chromogranin A, and CD56 were limited to 13, 10, and 1 cases, respectively. The discordance was highly contrasted with concordantly positive TACs. INSM1 and NE makers were rarely expressed in thymomas. INSM1 expression in TSCs was also associated with CD5 expression, which was significantly less frequent in INSM1-negative TSCs. INSM1, ASCL1, and SOX2 expressions were correlated with one another, but none of the single transcription factors or their combinations is associated with NE expression. The non-neoplastic medullary thymic epithelium was dispersedly positive for INSM1, particularly around Hassall's corpuscles. Despite positive INSM1, a significant decrease in the frequency of NE maker expression may present as a diagnostic pitfall in TSCs. Furthermore, the discordance, which was inherent in the non-neoplastic thymic epithelium, might be a characteristic feature in TSCs.
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Affiliation(s)
- Jumpei Kashima
- Department of Diagnostic Pathology, National Cancer Center Hospital, 5-1-1, Tsukiji, Chuo-Ku, Tokyo, 104-0045, Japan.,Department of Pathology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Taiki Hashimoto
- Department of Diagnostic Pathology, National Cancer Center Hospital, 5-1-1, Tsukiji, Chuo-Ku, Tokyo, 104-0045, Japan
| | - Akihiko Yoshida
- Department of Diagnostic Pathology, National Cancer Center Hospital, 5-1-1, Tsukiji, Chuo-Ku, Tokyo, 104-0045, Japan
| | - Yasushi Goto
- Department of Thoracic Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Tetsuo Ushiku
- Department of Pathology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Yuichiro Ohe
- Department of Thoracic Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Shun-Ichi Watanabe
- Department of Thoracic Surgery, National Cancer Center Hospital, Tokyo, Japan
| | - Yasushi Yatabe
- Department of Diagnostic Pathology, National Cancer Center Hospital, 5-1-1, Tsukiji, Chuo-Ku, Tokyo, 104-0045, Japan.
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Lin YW, Ting CH, Chen TY, Leu YS. Nasopharyngeal Large Cell Neuroendocrine Carcinoma Synchronized With Nasopharyngeal Squamous Cell Carcinoma: A Case Report and Review of Literature. EAR, NOSE & THROAT JOURNAL 2022:1455613221138210. [PMID: 36345713 DOI: 10.1177/01455613221138210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2023] Open
Abstract
Neuroendocrine carcinomas (NECs) are poorly differentiated neuroendocrine tumors of the upper respiratory tract. We present an extremely rare case of nasopharyngeal large cell neuroendocrine carcinoma (LCNEC) synchronized with nasopharyngeal squamous cell carcinoma (SCC). Both SCC and LCNEC are associated with Epstein-Barr virus (EBV) infection, supported by the positive result of Epstein-Barr encoding region in-situ hybridization. Strong correlation is found between EBV infection and nasopharyngeal malignancies. Furthermore, the EBV status might be a crucial prognostic factor in nasopharyngeal LCNEC. EBV-positive LCNEC is effective to chemoradiotherapy, and may have preferable outcome than EBV-negative LCNEC arising in the nasopharynx or other sites. The recognition of the EBV status is important for patients to receive appropriate treatment.
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Affiliation(s)
- Yu-Wen Lin
- Department of Otolaryngology-Head and Neck Surgery, MacKay Memorial Hospital, Taipei, Taiwan
| | - Ching-Heng Ting
- Department of Pathology, MacKay Memorial Hospital, Taipei, Taiwan
- Department of Medicine, MacKay Medical College, New Taipei City, Taiwan
| | - Tung-Ying Chen
- Department of Pathology, MacKay Memorial Hospital, Taipei, Taiwan
| | - Yi-Shing Leu
- Department of Otolaryngology-Head and Neck Surgery, MacKay Memorial Hospital, Taipei, Taiwan
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23
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Yang L, Fan Y, Lu H. Pulmonary Large Cell Neuroendocrine Carcinoma. PATHOLOGY AND ONCOLOGY RESEARCH 2022; 28:1610730. [PMID: 36304941 PMCID: PMC9592721 DOI: 10.3389/pore.2022.1610730] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 09/29/2022] [Indexed: 11/30/2022]
Abstract
Pulmonary large cell neuroendocrine carcinoma (LCNEC) is a rare subtype of malignant pulmonary tumor. The incidence rate of LCNEC was reported to be 0.3%–3% in lung cancers. Although LCNEC is classified as non-small cell lung cancer (NSCLC), it is more aggressive and malignant than other NSCLC, and its biological behavior is similar to that of small cell lung cancer (SCLC). Most of the LCNEC patients are elderly smoking male and the clinical manifestations are not specific. The imaging manifestations of the tumors are often located in the periphery and the upper lobes, and the enlargement of mediastinal or hilar lymph nodes is common. The diagnosis is mainly based on pathology by the histological features and immunohistochemistry (IHC). Specific neuroendocrine markers such as chromogranin A (CgA), synaptophysin (Syn) and CD56 are usually diffusely positive in LCNEC, and found that insulinoma-associated protein (INSM1) and high rate of Ki-67 are helpful for diagnosis. More differential diagnoses also increase the difficulty of correctly diagnosing LCNEC. The rise of LCNEC molecular typing in recent years may be helpful for diagnosis and subsequent treatment. This review focuses on the epidemiological features, imaging studies, pathology, diagnosis, treatment, and prognosis of LCNEC.
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Affiliation(s)
- Lan Yang
- Zhejiang Key Laboratory of Diagnosis and Treatment Technology on Thoracic Oncology (Lung and Esophagus), Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, China
- Department of Thoracic Medical Oncology, Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, China
- Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, China
- The Second Clinical Medical College, Wenzhou Medical University, Wenzhou, China
| | - Ying Fan
- Zhejiang Key Laboratory of Diagnosis and Treatment Technology on Thoracic Oncology (Lung and Esophagus), Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, China
- Department of Thoracic Medical Oncology, Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, China
- Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, China
- The Second Clinical Medical College, Wenzhou Medical University, Wenzhou, China
| | - Hongyang Lu
- Zhejiang Key Laboratory of Diagnosis and Treatment Technology on Thoracic Oncology (Lung and Esophagus), Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, China
- Department of Thoracic Medical Oncology, Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, China
- Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, China
- The Second Clinical Medical College, Wenzhou Medical University, Wenzhou, China
- *Correspondence: Hongyang Lu,
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24
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Wang Y, Wu N, Wang K, Liao Y, Guo J, Zhong B, Guo T, Liang J, Jiang N. Specific classification and new therapeutic targets for neuroendocrine prostate cancer: A patient-based, diagnostic study. Front Genet 2022; 13:955133. [PMID: 36118857 PMCID: PMC9479159 DOI: 10.3389/fgene.2022.955133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Accepted: 08/10/2022] [Indexed: 11/13/2022] Open
Abstract
Objective: Neuroendocrine prostate cancer (NEPC) is an aggressive variant of prostate cancer (PC) that may arise de novo or in patients previously treated with hormonal therapies for prostate adenocarcinoma as a mechanism of resistance. In our investigation, there appeared to be a strong correlation between neuroendocrine differentiation prostate cancer (NEDPC) and NEPC. The objectives of this study included exploring whether NEDPC is an intermediate stage in the progression of high-risk prostate cancer (HRPC) to NEPC and identifying risk factors and new targets associated with survival in the treatment of NEPC.Methods: The selected prostate cancer patients were progressed to high-risk and characterized by neuroendocrine. We collected the clinical data and characteristics of patients with three types of cancer: the incidence of metastasis, site and time of metastasis, recurrence rate, related treatment methods, etc. The similarity and differences of the three groups were compared through experiment and database.Results: By analyzing the clinical data and immunohistochemical results, we found that there seems to be a clinical feature of neuroendocrine differentiation (NED) status in between when patients progress from PC to NEPC. Finding novel treatment targets would therefore be beneficial by taking into account NEDPC as the stage of PC progression prior to NEPC. The metastasis-free survival curve and the immunohistochemical results are informing us that NEDPC can be a pre-state for diagnosing NEPC.Conclusion: NEPC is a late PC symptom that is frequently disregarded and has a bad prognosis. Finding novel treatment targets would therefore be beneficial by taking into account NEDPC as the stage of PC progression prior to NEPC.
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Affiliation(s)
- YouZhi Wang
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, China
| | - Ning Wu
- Key Laboratory of Breast Cancer Prevention and Therapy, State Ministry of Education, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin Clinical Research Center for Cancer, Tianjin Medical University Cancer Hospital and Institute, Tianjin, China
| | - KeKe Wang
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, China
| | - YiHao Liao
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, China
| | - JiaNing Guo
- Department of Pathology, The Second Hospital of Tianjin Medical University, Tianjin, China
| | - BoQiang Zhong
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, China
| | - Tao Guo
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, China
| | - JiaMing Liang
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, China
| | - Ning Jiang
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, China
- *Correspondence: Ning Jiang,
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25
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Zhong E, Pareja F, Hanna MG, Jungbluth AA, Rekhtman N, Brogi E. Expression of novel neuroendocrine markers in breast carcinomas: a study of INSM1, ASCL1, and POU2F3. Hum Pathol 2022; 127:102-111. [PMID: 35690220 PMCID: PMC10227884 DOI: 10.1016/j.humpath.2022.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 05/31/2022] [Accepted: 06/02/2022] [Indexed: 11/29/2022]
Abstract
INSM1, ASCL1, and POU2F3 are novel transcription factors involved in neuroendocrine (NE) differentiation of neoplasms in several organs, but data on their expression in breast carcinomas (BCs) are limited. We retrospectively evaluated the expression of these markers in a series of 97 BCs (58 with NE morphology and 39 with otherwise uncommon morphology) tested prospectively using immunohistochemistry (IHC). Nuclear staining in >50% of the cells was used as the positive cut-off. Thirty-two of the 97 BCs (33%) were INSM1-positive. INSM1-positivity correlated significantly with histologic type and presence of stromal mucin. INSM1 also correlated with synaptophysin and chromogranin, established markers of NE differentiation (P < .0001 and P = .0023, respectively). In BC with NE morphology, the expression of INSM1 supported NE differentiation, and INSM1 was more specific than synaptophysin and more sensitive and specific than chromogranin. INSM1 was the most expressed NE marker in 17 BCs. INSM1-positive BCs included 56% of solid papillary BCs, 88% of BCs with solid papillary features, and 75% of high-grade NE carcinomas. Of 35 BCs tested for POU2F3 and ASCL1, only 1 and 4 cases were positive, respectively. Our results show that INSM1 is a sensitive marker of NE differentiation in BC and should be included with synaptophysin and chromogranin in the IHC panel used to evaluate NE differentiation in BC with NE morphology. ASCL1 and POU2F3 are uncommon in BC and their routine assessment is not warranted.
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Affiliation(s)
- Elaine Zhong
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York City, New York, 10065 USA
| | - Fresia Pareja
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York City, New York, 10065 USA
| | - Matthew G Hanna
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York City, New York, 10065 USA
| | - Achim A Jungbluth
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York City, New York, 10065 USA
| | - Natasha Rekhtman
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York City, New York, 10065 USA
| | - Edi Brogi
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York City, New York, 10065 USA.
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26
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Insulinoma-Associated Protein 1 (INSM1): Diagnostic, Prognostic, and Therapeutic Use in Small Cell Lung Cancer. JOURNAL OF MOLECULAR PATHOLOGY 2022. [DOI: 10.3390/jmp3030013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Small cell lung carcinoma (SCLC) is an aggressive and difficult to treat cancer. Although immunohistochemistry is not mandatory for a SCLC diagnosis, it might be required, especially in small samples. Insulinoma-associated protein 1 (INSM1) is expressed in endocrine and nervous tissues during embryogenesis, generally absent in adults and re-expressed in SCLC and other neuroendocrine neoplasms. Its high specificity propelled its use as diagnostic biomarker and an attractive therapeutic target. Herein, we aim to provide a systematic and critical review on the use of INSM1 for diagnosis, prognostication and the treatment of SCLC. An extensive bibliographic search was conducted in PubMed® focusing on articles published since 2015. According to the literature, INSM1 is a highly sensitive (75–100%) and specific (82–100%) neuroendocrine immunohistochemical marker for SCLC diagnosis. It can be used in histological and cytological samples. Although advantageous, its standalone use is currently not recommended. Studies correlating INSM1 expression and prognosis have disclosed contrasting results, although the expression seemed to entail a worse survival. Targeting INSM1 effectively suppressed SCLC growth either as a suicide gene therapy regulator or as an indirect target of molecular-targeted therapy. INSM1 represents a valuable biomarker for a SCLC diagnosis that additionally offers vast opportunities for the development of new prognostic and therapeutic strategies.
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27
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Su W, Yang K, Jiang H, Song H, Feng K, Li Q. Human epididymis protein 4 (HE4) is a novel immunohistochemical marker of neuroendocrine differentiation. Virchows Arch 2022; 481:433-441. [PMID: 35913578 DOI: 10.1007/s00428-022-03387-4] [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] [Received: 12/27/2021] [Revised: 04/12/2022] [Accepted: 07/24/2022] [Indexed: 11/28/2022]
Abstract
Human epididymis protein 4 (HE4) is originally described as an epididymis specific protein and now clinically used as a serum marker for ovarian carcinoma. However, the expression of HE4 in neuroendocrine neoplasms (NENs) has not been studied. By immunohistochemistry, the expressions of HE4 in 94 normal tissues and 484 NENs which included 242 well-differentiated NENs and 242 poorly differentiated NENs were studied. HE4 was positive in 90/94 (95.7%) of the neuroendocrine cells in normal tissues, 228/242 (94.2%) of well-differentiated NENs, and 206/242 (85.1%) of poorly differentiated NENs, and the expression of HE4 decreased progressively with loss of histological differentiation, with the positive rate of 96.2%, 92.7%, 92.3%, 85.4%, and 84.4% in NET-G1/carcinoid, NET-G2/atypical carcinoid, NET-G3, NEC-LC, and NEC-SC respectively. In NET-G1 and NET-G2, HE4 staining showed a peculiar polarized distribution, with an extraordinarily strong granular staining in subnuclear cytoplasm. A diffuse and uniform cytoplastic HE4 staining was observed in NET-G3 and poorly differentiated NENs. The positive rate of HE4 in primary tumors (91.1%, 387/425) was significantly higher than that of metastases (79.7%, 47/59) (p < 0.05). In a series of 70 pure non-NENs poorly differentiated carcinomas, the specificity rate of HE4 was 92.9% (65/70), which was in line with that of Syn. The negative rate of HE4 was 87.0% (40/46) in the non-neuroendocrine components of the MiNEN cases, which was lower than that of the pure non-neuroendocrine carcinomas (92.9%, 65/70) but without statistical significance (p > 0.05). HE4 may prove to be a useful immunohistochemical marker of neuroendocrine differentiation, although comparative studies and a more extensive analysis of other tissue types are necessary.
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Affiliation(s)
- Wenjing Su
- Department of Pathology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, People's Republic of China
| | - Kun Yang
- Central Laboratory, Affiliated Hospital of Qingdao University, Qingdao, 266003, People's Republic of China
| | - Huifeng Jiang
- Department of Pathology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, 266035, People's Republic of China
| | - Haiyun Song
- Department of Pathology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, 266035, People's Republic of China
| | - Kun Feng
- Department of Pathology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, 266035, People's Republic of China
| | - Qiuyao Li
- Department of Pathology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, 266035, People's Republic of China.
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28
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Fan J, Li H, Zhou C, Xiong W, Villamil C, Ionescu D, Oo HZ, Contreras-Sanz A, Black PC, Wang G. Classifying Pulmonary and Urinary High-grade Neuroendocrine Carcinoma by CK7 Immunohistochemistry. Appl Immunohistochem Mol Morphol 2022; 30:459-468. [PMID: 35603802 DOI: 10.1097/pai.0000000000001036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 04/17/2022] [Indexed: 11/26/2022]
Abstract
High-grade neuroendocrine carcinoma (HGNEC) is subclassified into small cell carcinoma (SmCC) and large cell neuroendocrine carcinoma (LCNEC). Although both are clinically aggressive, the SmCC and LCNEC need to have different treatment strategies, and accurate pathologic diagnosis is challenging. We studied a large retrospective cohort (186 cases) of HGNEC of bladder and lung to investigate the abundance of cytokeratin (CK) 7 expression and staining pattern in SmCC and LCNEC. Overall, the pulmonary and urinary HGNEC exhibited several different CK7 staining patterns, including negative staining (n=28), dot-like staining (n=73), partial membranous staining (n=26), and complete membranous staining (n=60). Overall, 88.9% (44/49) of pulmonary SmCC and 88.0% (44/50) of urinary SmCC showed negative or dot-like patterns for CK7, while 90.8% (59/65) of pulmonary LCNEC and 72.7% (16/22) of urinary LCNEC showed partial or complete membranous patterns for CK7 (χ 2 =105.05, P <0.0001). The distinct staining patterns were also present in those mixed SmCC and LCNEC. In addition, the specimen types or fixation did not affect CK7 staining patterns. In conclusion, CK7 has a high differential value for SmCC and LCNEC and could help guide personalized treatment for patients.
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Affiliation(s)
| | | | - Chen Zhou
- University of British Columbia
- Department of Pathology, British Columbia Cancer Vancouver Centre
| | - Wei Xiong
- University of British Columbia
- Department of Pathology, St. Paul's Hospital, Vancouver, BC, Canada
| | - Carlos Villamil
- University of British Columbia
- Department of Pathology, British Columbia Cancer Vancouver Centre
| | - Diana Ionescu
- University of British Columbia
- Department of Pathology, British Columbia Cancer Vancouver Centre
| | - Htoo Z Oo
- Department of Urologic Sciences, University of British Columbia
| | | | - Peter C Black
- Department of Urologic Sciences, University of British Columbia
| | - Gang Wang
- University of British Columbia
- Department of Pathology, British Columbia Cancer Vancouver Centre
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29
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Agarwal S, van Zante A, Granados ML. Combined Neuroendocrine and Squamous Cell Carcinoma of the Sinonasal Tract: A Morphologic and Immunohistochemical Analysis and Review of Literature. Head Neck Pathol 2022; 16:1019-1033. [PMID: 35507300 PMCID: PMC9729485 DOI: 10.1007/s12105-022-01457-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 04/16/2022] [Indexed: 12/16/2022]
Abstract
Sinonasal malignancies constitute 3% of head and neck cancers, with squamous cell carcinoma (SCC) the most common histology. Neuroendocrine carcinomas (NEC) are rare, with a subset showing neuroendocrine carcinoma and a non-neuroendocrine component. The pathogenesis of these combined tumors is largely unknown, and TP53 driver mutations may play a role. A database search for combined NEC was performed across two institutions (UNM and UCSF) spanning 15 years. Excluding NUT midline carcinoma, 3 cases met inclusion criteria. All were morphologically NEC + SCC and underwent a comprehensive immunohistochemical evaluation. Tumors demonstrated two components histologically: moderately to poorly differentiated SCC and high-grade NEC. Divergent differentiation was confirmed with lineage-specific markers. Only one patient received neoadjuvant chemotherapy prior to surgery, with a remarkable response (a marked decrease in the size of the primary lesion and resolution of liver metastases). Immunohistochemical staining for p53 was increased in 2 of 3 cases (both components), suggesting a role in the carcinogenesis of these tumors. Aberrant expression of beta-catenin was not identified. One case tested positive for p16, which can be seen in high grade NECs due to inactivation of Rb gene. Additionally, both cases with a small cell NEC component expressed PD-L1, suggesting that immunotherapy may be an effective treatment. Findings in this study support the role of p53 mutation in a subset of combined NEC + SCC of the sinonasal tract. Recognition of this rare entity is essential for optimal management of these aggressive neoplasms.
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Affiliation(s)
- Shweta Agarwal
- Department of Pathology, University of New Mexico School of Medicine, University of New Mexico, MSC08 4640, Albuquerque, NM 87131 USA ,Department of Pathology, University of New Mexico Health Sciences Center, Albuquerque, NM USA
| | - Annemieke van Zante
- Department of Pathology, University of California San Francisco, San Francisco, CA USA
| | - Michaela L. Granados
- Department of Pathology, University of New Mexico School of Medicine, University of New Mexico, MSC08 4640, Albuquerque, NM 87131 USA
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30
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Sandison A. Update from the 5th Edition of the World Health Organization Classification of Head and Neck Tumours: Tumours of the Ear. Head Neck Pathol 2022; 16:76-86. [PMID: 35397067 PMCID: PMC9018943 DOI: 10.1007/s12105-022-01450-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Accepted: 03/21/2022] [Indexed: 11/27/2022]
Abstract
In the recently published 5th Edition of the World Health Organisation Classification of Head and Neck Tumours, there are relatively few changes to report in terms of nomenclature in lesions of ear and temporal bone and fewer developments in molecular pathogenesis in comparison to other sites, particularly in sinonasal tract. Ear and temporal bone tumours are rare and biopsy material is limited. As a result, resources in the literature are scarce with few large series, no controlled clinical trials and the approaches to staging and management are not standardised. New entities are difficult to characterise. The number of entries has, however, increased for tumours of the ear and temporal bone (thirteen) compared to the 4th Edition (eleven). Some lesions previously included in the 4th Edition considered to have no site-specific features have been excluded to be discussed elsewhere and other benign lesions that are specific to this site have been included. The tumours and tumour-like entities of ear and temporal bone are discussed here mindful that the chapter in the 5th edition better correlates disease processes with clinical information and imaging and as far as possible standardises nomenclature.
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Affiliation(s)
- Ann Sandison
- Guy’s & St Thomas’ NHS Foundation Trust, King’s College London, London, UK
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31
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Mete O, Wenig BM. Update from the 5th Edition of the World Health Organization Classification of Head and Neck Tumors: Overview of the 2022 WHO Classification of Head and Neck Neuroendocrine Neoplasms. Head Neck Pathol 2022; 16:123-142. [PMID: 35312985 PMCID: PMC9018952 DOI: 10.1007/s12105-022-01435-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Accepted: 02/21/2022] [Indexed: 12/17/2022]
Abstract
This review article provides a brief overview of the new WHO classification by adopting a question-answer model to highlight the spectrum of head and neck neuroendocrine neoplasms which includes epithelial neuroendocrine neoplasms (neuroendocrine tumors and neuroendocrine carcinomas) arising from upper aerodigestive tract and salivary glands, and special neuroendocrine neoplasms including middle ear neuroendocrine tumors (MeNET), ectopic or invasive pituitary neuroendocrine tumors (PitNET; formerly known as pituitary adenoma) and Merkel cell carcinoma as well as non-epithelial neuroendocrine neoplasms (paragangliomas). The new WHO classification follows the IARC/WHO nomenclature framework and restricts the diagnostic term of neuroendocrine carcinoma to poorly differentiated epithelial neuroendocrine neoplasms. In this classification, well-differentiated epithelial neuroendocrine neoplasms are termed as neuroendocrine tumors (NET), and are graded as G1 NET (no necrosis and < 2 mitoses per 2 mm2; Ki67 < 20%), G2 NET (necrosis or 2-10 mitoses per 2 mm2, and Ki67 < 20%) and G3 NET (> 10 mitoses per 2 mm2 or Ki67 > 20%, and absence of poorly differentiated cytomorphology). Neuroendocrine carcinomas (> 10 mitoses per 2 mm2, Ki67 > 20%, and often associated with a Ki67 > 55%) are further subtyped based on cytomorphological characteristics as small cell and large cell neuroendocrine carcinomas. Unlike neuroendocrine carcinomas, head and neck NETs typically show no aberrant p53 expression or loss of RB reactivity. Ectopic or invasive PitNETs are subtyped using pituitary transcription factors (PIT1, TPIT, SF1, GATA3, ER-alpha), hormones and keratins (e.g., CAM5.2). The new classification emphasizes a strict correlation of morphology and immunohistochemical findings in the accurate diagnosis of neuroendocrine neoplasms. A particular emphasis on the role of biomarkers in the confirmation of the neuroendocrine nature of a neoplasm and in the distinction of various neuroendocrine neoplasms is provided by reviewing ancillary tools that are available to pathologists in the diagnostic workup of head and neck neuroendocrine neoplasms. Furthermore, the role of molecular immunohistochemistry in the diagnostic workup of head and neck paragangliomas is discussed. The unmet needs in the field of head and neck neuroendocrine neoplasms are also discussed in this article. The new WHO classification is an important step forward to ensure accurate diagnosis that will also form the basis of ongoing research in this field.
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Affiliation(s)
- Ozgur Mete
- Department of Pathology, University Health Network, 200 Elizabeth Street, 11th floor, Toronto, ON, Canada.
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada.
- Endocrine Oncology Site, The Princess Margaret Cancer Center, Toronto, ON, Canada.
| | - Bruce M Wenig
- Department of Pathology Moffitt Cancer Center, Tampa, FL, USA
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Rindi G, Mete O, Uccella S, Basturk O, La Rosa S, Brosens LAA, Ezzat S, de Herder WW, Klimstra DS, Papotti M, Asa SL. Overview of the 2022 WHO Classification of Neuroendocrine Neoplasms. Endocr Pathol 2022; 33:115-154. [PMID: 35294740 DOI: 10.1007/s12022-022-09708-2] [Citation(s) in RCA: 219] [Impact Index Per Article: 109.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/28/2022] [Indexed: 02/07/2023]
Abstract
In this review, we detail the changes and the relevant features that are applied to neuroendocrine neoplasms (NENs) in the 2022 WHO Classification of Endocrine and Neuroendocrine Tumors. Using a question-and-answer approach, we discuss the consolidation of the nomenclature that distinguishes neuronal paragangliomas from epithelial neoplasms, which are divided into well-differentiated neuroendocrine tumors (NETs) and poorly differentiated neuroendocrine carcinomas (NECs). The criteria for these distinctions based on differentiation are outlined. NETs are generally (but not always) graded as G1, G2, and G3 based on proliferation, whereas NECs are by definition high grade; the importance of Ki67 as a tool for classification and grading is emphasized. The clinical relevance of proper classification is explained, and the importance of hormonal function is examined, including eutopic and ectopic hormone production. The tools available to pathologists for accurate classification include the conventional biomarkers of neuroendocrine lineage and differentiation, INSM1, synaptophysin, chromogranins, and somatostatin receptors (SSTRs), but also include transcription factors that can identify the site of origin of a metastatic lesion of unknown primary site, as well as hormones, enzymes, and keratins that play a role in functional and structural correlation. The recognition of highly proliferative, well-differentiated NETs has resulted in the need for biomarkers that can distinguish these G3 NETs from NECs, including stains to determine expression of SSTRs and those that can indicate the unique molecular pathogenetic alterations that underlie the distinction, for example, global loss of RB and aberrant p53 in pancreatic NECs compared with loss of ATRX, DAXX, and menin in pancreatic NETs. Other differential diagnoses are discussed with recommendations for biomarkers that can assist in correct classification, including the distinctions between epithelial and non-epithelial NENs that have allowed reclassification of epithelial NETs in the spine, in the duodenum, and in the middle ear; the first two may be composite tumors with neuronal and glial elements, and as this feature is integral to the duodenal lesion, it is now classified as composite gangliocytoma/neuroma and neuroendocrine tumor (CoGNET). The many other aspects of differential diagnosis are detailed with recommendations for biomarkers that can distinguish NENs from non-neuroendocrine lesions that can mimic their morphology. The concepts of mixed neuroendocrine and non-neuroendocrine (MiNEN) and amphicrine tumors are clarified with information about how to approach such lesions in routine practice. Theranostic biomarkers that assist patient management are reviewed. Given the significant proportion of NENs that are associated with germline mutations that predispose to this disease, we explain the role of the pathologist in identifying precursor lesions and applying molecular immunohistochemistry to guide genetic testing.
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Affiliation(s)
- Guido Rindi
- Department of Life Sciences and Public Health, Section of Anatomic Pathology, Università Cattolica del Sacro Cuore, Rome, Italy.
- Department of Woman and Child Health Sciences and Public Health, Anatomic Pathology Unit, Fondazione Policlinico Universitario A. Gemelli - IRCCS, Largo A. Gemelli, 8, 00168, Rome, Italy.
- ENETS Center of Excellence, Rome, Italy.
| | - Ozgur Mete
- Department of Pathology, University Health Network, University of Toronto, 200 Elizabeth Street, 11th floor, Toronto, ON, M5G 2C4, Canada.
| | - Silvia Uccella
- Unit of Pathology, Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | - Olca Basturk
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Stefano La Rosa
- Unit of Pathology, Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | - Lodewijk A A Brosens
- Department of Pathology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Shereen Ezzat
- Department of Medicine, University Health Network, University of Toronto, Toronto, ON, Canada
| | - Wouter W de Herder
- Department of Internal Medicine, Sector of Endocrinology, Erasmus MC Cancer Institute, ENETS Center of Excellence Rotterdam, Erasmus MC, Rotterdam, The Netherlands
| | - David S Klimstra
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Paige.AI, New York, NY, USA
| | - Mauro Papotti
- Department of Oncology, University of Turin, Turin, Italy
| | - Sylvia L Asa
- Department of Pathology, University Hospitals Cleveland Medical Center, Case Western Reserve University, Cleveland, OH, USA
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Yanai H, Ishida M, Yoshikawa K, Tsuta K, Sekimoto M, Sugie T. Immunohistochemical analyses of the expression profiles of INSM1, ATRX, DAXX and DLL3 in solid papillary carcinomas of the breast. Oncol Lett 2022; 23:137. [PMID: 35317025 PMCID: PMC8907926 DOI: 10.3892/ol.2022.13257] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Accepted: 02/22/2022] [Indexed: 11/22/2022] Open
Abstract
Solid papillary carcinoma (SPC) is a rare but distinct clinicopathological feature of breast cancer characterised by frequent neuroendocrine differentiation. Insulinoma-associated protein 1 (INSM1) is a useful neuroendocrine marker for various neuroendocrine tumours. α-thalassemia/mental retardation syndrome X-linked protein (ATRX) and death domain-associated protein (DAXX) are useful prognostic markers for patients with pancreatic neuroendocrine tumours. However, to the best of our knowledge, few studies have addressed INSM1 expression in SPCs. Although ATRX, DAXX and δ-like canonical notch ligand 3 (DLL3) are frequently expressed in neuroendocrine lung carcinomas, there are no reports on their expression in SPCs. Therefore, the present study aimed to analyse the expression profiles of INSM1, ATRX, DAXX and DLL3 in the largest series of patients with SPC that has been, to the best of our knowledge, studied until now. Immunohistochemical analyses were performed to determine chromogranin A, synaptophysin, INSM1, ATRX, DAXX and DLL3 expression in 39 specimens surgically resected from patients with SPC (18 SPC in situ and 21 SPC invasive). The associations between the expression of these markers and the clinicopathological factors were investigated. Chromogranin A, synaptophysin and INSM1 were expressed in 64.1, 100 and 92.3% of the patients, respectively. Both ATRX and DAXX expression was observed in 28.2% of the patients. No patient expressed DLL3. Lack of INSM1 or chromogranin A expression was significantly associated with advanced pathological stages in patients with SPC (P=0.033) and in patients with invasive SPC (P=0.012), showing a tendency for a high Ki-67 labelling index (LI) and advanced histological grade in patients with invasive SPC. Loss of ATRX or DAXX expression was significantly associated with lymphatic invasion, but not with histological grade, Ki-67 LI or presence of invasive tumours. Thus, INSM1 was demonstrated to be a useful diagnostic marker for SPCs. Overall, detecting the lack of INSM1 or chromogranin A expression may be useful for analysing the characteristics of tumour cells in SPCs.
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Affiliation(s)
- Hirotsugu Yanai
- Department of Surgery, Kansai Medical University, Hirakata, Osaka 573‑1191, Japan
| | - Mitsuaki Ishida
- Department of Pathology and Division of Diagnostic Pathology, Kansai Medical University, Hirakata, Osaka 573‑1191, Japan
| | - Katsuhiro Yoshikawa
- Department of Surgery, Kansai Medical University, Hirakata, Osaka 573‑1191, Japan
| | - Koji Tsuta
- Department of Pathology and Division of Diagnostic Pathology, Kansai Medical University, Hirakata, Osaka 573‑1191, Japan
| | - Mitsugu Sekimoto
- Department of Surgery, Kansai Medical University, Hirakata, Osaka 573‑1191, Japan
| | - Tomoharu Sugie
- Department of Surgery, Kansai Medical University, Hirakata, Osaka 573‑1191, Japan
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Turri-Zanoni M, Gravante G, Castelnuovo P. Molecular Biomarkers in Sinonasal Cancers: New Frontiers in Diagnosis and Treatment. Curr Oncol Rep 2022; 24:55-67. [PMID: 35059992 PMCID: PMC8831338 DOI: 10.1007/s11912-021-01154-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/03/2021] [Indexed: 12/13/2022]
Abstract
Purpose of Review Sinonasal tumors are rare and heterogeneous diseases which pose challenges in diagnosis and treatment. Despite significant progress made in surgical, oncological, and radiotherapy fields, their prognosis still remains poor. Therefore, alternative strategies should be studied in order to refine diagnosis and improve patient care. Recent Findings In recent years, in-depth molecular studies have identified new biological markers, such as genetic abnormalities and epigenetic variations, which have allowed to refine diagnosis and predict prognosis. As a consequence, new histological entities have been described and specific subgroup stratifications within the well-known histotypes have been made possible. These discoveries have expanded indications for immunotherapy and targeted therapies in order to reduce tumor spread, thus representing a valuable implementation of standard treatments. Summary Recent findings in molecular biology have paved the way for better understanding and managing such rare and aggressive tumors. Although further efforts need to be made in this direction, expectations are promising.
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Amjad MM, Jacobs SM, Callahan MA, Gonzalez ML, Tavakoli M. Small Cell Neuroendocrine Carcinoma Presenting as Recurrent Dacryocystitis: Case Report of a Rare Entity. Ophthalmic Plast Reconstr Surg 2022; 38:e2-e6. [PMID: 34431823 DOI: 10.1097/iop.0000000000002052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
An 84-year-old man presented with a localized, firm, tender mass over the right lacrimal sac. He had a history of acute dacryocystitis in the same eye 6 months before presentation, which resolved with antibiotics followed by uneventful dacryocystorhinostomy. At repeat presentation, the patient underwent orbital imaging and excisional biopsy of the lesion. Histologic studies revealed a small cell neuroendocrine carcinoma. The patient was subsequently treated with chemotherapy and radiation. Although there are rare reports of small cell neuroendocrine carcinoma originating in the sino-orbital-lacrimal region, this is the first report of tumor presentation with acute dacryocystitis in a patient with prior dacryocystorhinostomy.
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Affiliation(s)
- Muhammad M Amjad
- University of Alabama at Birmingham School of Medicine, Birmingham, Alabama
| | - Sarah M Jacobs
- Department of Ophthalmology and Visual Sciences, University of Alabama at Birmingham School of Medicine, Birmingham, Alabama
| | - Michael A Callahan
- Department of Ophthalmology and Visual Sciences, University of Alabama at Birmingham School of Medicine, Birmingham, Alabama
| | - Manuel Lora Gonzalez
- Department of Pathology, University of Alabama at Birmingham School of Medicine, Birmingham, Alabama, U.S.A
| | - Mehdi Tavakoli
- Department of Ophthalmology and Visual Sciences, University of Alabama at Birmingham School of Medicine, Birmingham, Alabama
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Kakkar A, Ashraf SF, Rathor A, Adhya AK, Mani S, Sikka K, Jain D. SMARCA4/BRG1-Deficient Sinonasal Carcinoma: Morphologic Spectrum of an Evolving Entity. Arch Pathol Lab Med 2021; 146:1122-1130. [PMID: 34871352 DOI: 10.5858/arpa.2021-0001-oa] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2021] [Indexed: 11/06/2022]
Abstract
CONTEXT.— Molecular analysis of poorly differentiated/undifferentiated sinonasal neoplasms has resulted in identification of a growing number of genetically defined tumors. SMARCA4-deficient sinonasal carcinoma is one such recently described entity that emerged from within sinonasal undifferentiated carcinoma (SNUC), neuroendocrine carcinoma (NEC), and teratocarcinosarcoma (TCS). OBJECTIVE.— To identify SMARCA4-deficient sinonasal carcinomas from a large institutional cohort of poorly differentiated/undifferentiated carcinomas and evaluate their clinicopathologic features. DESIGN.— SMARCA4/BRG1 immunohistochemistry was performed on all tumors diagnosed as SNUC, poorly differentiated carcinoma, NEC, and TCS during a 12-year period. SMARCA2/BRM and INSM1 immunostaining was performed in SMARCA4-deficient cases. RESULTS.— Twelve SMARCA4-deficient sinonasal carcinomas were identified among 299 cases. Morphologically, 5 cases were large cell NEC, 2 cases were small cell NEC, and 5 were TCS. SMARCA4 loss was diffuse and complete in 10 cases, while 2 cases showed focal retention. Most cases showed diffuse cytokeratin staining accompanied by weak, usually focal staining for chromogranin and synaptophysin. INSM-1 showed negativity in most cases. All cases showed retained SMARCA2 expression. IDH1/2 mutation was absent in all cases analyzed. Four of 7 patients died of disease, and aggressive multimodality treatment had better outcome. CONCLUSIONS.— SMARCA4-deficient sinonasal carcinomas are morphologically akin to sinonasal poorly differentiated NECs and TCS, display cytokeratin positivity and only focal staining for neuroendocrine markers, and have aggressive biological behavior. Inclusion of SMARCA4 in the immunohistochemical panel for diagnostic workup of all sinonasal NEC and TCS phenotypes will facilitate their early recognition. Comprehensive germline and somatic mutational analyses of these tumors are necessary for further insights into their molecular pathogenesis.
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Affiliation(s)
- Aanchal Kakkar
- From the Department of Pathology (Kakkar, Ashraf, Rathor, Jain), All India Institute of Medical Sciences, New Delhi, India
| | - Subiyathul Farah Ashraf
- From the Department of Pathology (Kakkar, Ashraf, Rathor, Jain), All India Institute of Medical Sciences, New Delhi, India
| | - Amber Rathor
- From the Department of Pathology (Kakkar, Ashraf, Rathor, Jain), All India Institute of Medical Sciences, New Delhi, India
| | - Amit Kumar Adhya
- The Department of Pathology and Laboratory Medicine, All India Institute of Medical Sciences, Bhubaneswar, India (Adhya)
| | - Suresh Mani
- The Department of Otorhinolaryngology and Head and Neck Surgery (Mani, Sikka), All India Institute of Medical Sciences, New Delhi, India
| | - Kapil Sikka
- The Department of Otorhinolaryngology and Head and Neck Surgery (Mani, Sikka), All India Institute of Medical Sciences, New Delhi, India
| | - Deepali Jain
- From the Department of Pathology (Kakkar, Ashraf, Rathor, Jain), All India Institute of Medical Sciences, New Delhi, India
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Asrani K, Torres AFC, Woo J, Vidotto T, Tsai HK, Luo J, Corey E, Hanratty B, Coleman I, Yegnasubramanian S, De Marzo AM, Nelson PS, Haffner MC, Lotan TL. Reciprocal YAP1 loss and INSM1 expression in neuroendocrine prostate cancer. J Pathol 2021; 255:425-437. [PMID: 34431104 PMCID: PMC8599638 DOI: 10.1002/path.5781] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 07/30/2021] [Accepted: 08/19/2021] [Indexed: 12/13/2022]
Abstract
Neuroendocrine prostate cancer (NEPC) is a rare but aggressive histologic variant of prostate cancer that responds poorly to androgen deprivation therapy. Hybrid NEPC-adenocarcinoma (AdCa) tumors are common, often eluding accurate pathologic diagnosis and requiring ancillary markers for classification. We recently performed an outlier-based meta-analysis across a number of independent gene expression microarray datasets to identify novel markers that differentiate NEPC from AdCa, including up-regulation of insulinoma-associated protein 1 (INSM1) and loss of Yes-associated protein 1 (YAP1). Here, using diverse cancer gene expression datasets, we show that Hippo pathway-related genes, including YAP1, are among the top down-regulated gene sets with expression of the neuroendocrine transcription factors, including INSM1. In prostate cancer cell lines, transgenic mouse models, and human prostate tumor cohorts, we confirm that YAP1 RNA and YAP1 protein expression are silenced in NEPC and demonstrate that the inverse correlation of INSM1 and YAP1 expression helps to distinguish AdCa from NEPC. Mechanistically, we find that YAP1 loss in NEPC may help to maintain INSM1 expression in prostate cancer cell lines and we further demonstrate that YAP1 silencing likely occurs epigenetically, via CpG hypermethylation near its transcriptional start site. Taken together, these data nominate two additional markers to distinguish NEPC from AdCa and add to data from other tumor types suggesting that Hippo signaling is tightly reciprocally regulated with neuroendocrine transcription factor expression. © 2021 The Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Kaushal Asrani
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD
| | - Alba F. C. Torres
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD
| | - Juhyung Woo
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD
| | - Thiago Vidotto
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD
| | - Harrison K. Tsai
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD
- Current address: Boston Children’s Hospital, Boston, MA
| | - Jun Luo
- Department of Urology, Johns Hopkins School of Medicine, Baltimore, MD
| | - Eva Corey
- Department of Urology, University of Washington, Seattle, WA
| | - Brian Hanratty
- Divisions of Human Biology and Clinical Research, Fred Hutchinson Cancer Center, Seattle, WA
| | - Ilsa Coleman
- Divisions of Human Biology and Clinical Research, Fred Hutchinson Cancer Center, Seattle, WA
| | - Srinivasan Yegnasubramanian
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD
- Department of Oncology, Johns Hopkins School of Medicine, Baltimore, MD
| | - Angelo M. De Marzo
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD
- Department of Urology, Johns Hopkins School of Medicine, Baltimore, MD
- Department of Oncology, Johns Hopkins School of Medicine, Baltimore, MD
| | - Peter S. Nelson
- Divisions of Human Biology and Clinical Research, Fred Hutchinson Cancer Center, Seattle, WA
| | - Michael C. Haffner
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD
- Divisions of Human Biology and Clinical Research, Fred Hutchinson Cancer Center, Seattle, WA
| | - Tamara L. Lotan
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD
- Department of Urology, Johns Hopkins School of Medicine, Baltimore, MD
- Department of Oncology, Johns Hopkins School of Medicine, Baltimore, MD
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Vyberg M, Nielsen S, Bzorek M, Røge R. NordiQC Assessments of Synaptophysin Immunoassays. Appl Immunohistochem Mol Morphol 2021; 29:643-647. [PMID: 34545849 DOI: 10.1097/pai.0000000000000975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 08/25/2021] [Indexed: 11/26/2022]
Abstract
This paper is number 8 in a series developed through a partnership between ISIMM and NordiQC with the purpose of reporting research assessing the performance characteristics of immunoassays in an external proficiency testing program.
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Affiliation(s)
- Mogens Vyberg
- Institute of Pathology
- Department of Clinical Medicine, Aalborg University Hospital, Aalborg
| | | | - Michael Bzorek
- Department of Surgical Pathology, Zealand University Hospital, Roskilde, Denmark
| | - Rasmus Røge
- Institute of Pathology
- Department of Clinical Medicine, Aalborg University Hospital, Aalborg
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Neuroendocrine Carcinoma of the Larynx and Pharynx: A Clinical and Histopathological Study. Cancers (Basel) 2021; 13:cancers13194813. [PMID: 34638312 PMCID: PMC8507659 DOI: 10.3390/cancers13194813] [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: 08/09/2021] [Revised: 09/18/2021] [Accepted: 09/23/2021] [Indexed: 12/12/2022] Open
Abstract
Simple Summary Neuroendocrine carcinomas (NECs) of the head and neck are rare. The presented series of 20 patients with laryngeal and pharyngeal NECs is population-based and one of the largest published to date. We analyzed the treatment results according to the type of therapy and the role of various standard (synaptophysin-chromogranin-CD56, Ki-67, p16, HPV, and EBV) and some novel (INSM1 and PD-L1) neuroendocrine markers or potential prognosticators. The results indicate the following: (1) laryngeal and pharyngeal NECs accounted for 0.43% and 0.17% of the cases in the corresponding tumor groups, respectively; (2) neuroendocrine differentiation can be reliably determined by INSM1 immunohistochemistry; (3) the prognosis was determined by the nodal stage and TNM stage but not by the histological grade (which refers to moderately and poorly differentiated NECs); (4) except in well-differentiated NECs and early-stage (T1-2N0-1) moderately/poorly differentiated NECs, aggressive multimodal therapy is needed; and (5) the p16, HPV, and EBV statuses failed to show any prognostic value. Abstract Neuroendocrine carcinomas (NECs) of the head and neck are rare and the experience scanty. The Cancer Registry of Slovenia database was used to identify cases of laryngeal and pharyngeal NECs diagnosed between 1995–2020. Biopsies were analyzed for the expression of standard neuroendocrine markers (synaptophysin, chromogranin, CD56), INSM1, Ki-67, p16, and PD-L1 (using the combined positive score, CPS). In situ hybridization for human papillomavirus (HPV) and Epstein–Barr virus (EBV) was performed. Twenty patients (larynx, 12; pharynx, 8) were identified. One tumor was well differentiated (WD), five were moderately differentiated (MD), and 14 were poorly differentiated (PD). Disease control was achieved solely by surgery in 4/4 MD/PD T1-2N0-1 tumors. Eight patients died of the disease, seven of which were due to distant metastases. All three traditional markers were positive in 11/17 NECs and the INSM1 marker in all 20 tumors. Two of fourteen p16-positive tumors were HPV-positive, but all three nasopharyngeal NECs were EBV-negative. Three tumors had CPSs ≥ 1. In conclusion, INSM1 was confirmed to be a reliable marker of neuroendocrine differentiation. Except in WD and early-stage MD/PD tumors, aggressive multimodal therapy is needed; the optimal systemic therapy remains to be determined. p16, HPV, and EBV seem to bear no prognostic information.
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Chen LY, Chang SL, Lee WY. Primary small cell neuroendocrine carcinoma in the nasal cavity: A CARE-compliant case report. Medicine (Baltimore) 2021; 100:e27136. [PMID: 34477164 PMCID: PMC8415994 DOI: 10.1097/md.0000000000027136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 08/18/2021] [Indexed: 01/05/2023] Open
Abstract
RATIONALE Small cell neuroendocrine carcinoma of the nasal cavity and paranasal sinuses is a rare but aggressive neoplasm with a poor prognosis and a strong propensity for regional recurrence and distant metastasis. Diagnosis is challenging and relies on immunohistochemical study. Treatment includes surgical resection, radiation therapy, chemotherapy, or a combination of these modalities. However, the optimal therapeutic strategy is still controversial. Due to its rarity, the complexity of the histological diagnosis, and the variety of the treatment regimens, we presented a case of primary small cell neuroendocrine carcinoma in the nasal cavity with description of the clinical manifestation, pathology features, and our treatment regimen. PATIENT CONCERNS An 82-year-old female patient with hypertension presented with right epistaxis on and off with nasal obstruction for several days. DIAGNOSIS An exophytic mass over the posterior end of the right inferior turbinate was found on nasopharyngoscope. Biopsy was done and the pathology confirmed small cell carcinoma, strongly positive for cytokeratin (AE1/AE3) and insulinoma-associated protein 1 (INSM-1), scatteredly positive for chromogranin A, synaptophysin and CD56. The final diagnosis was small cell neuroendocrine carcinoma of right nasal cavity, pT1N0M0, stage I. INTERVENTIONS The patient underwent wide excision of right intra-nasal tumor and post-operative radiotherapy with a dose of 6600 cGy in 33 fractions. OUTCOMES No local recurrence or distant metastasis was noted during the 12 months of follow-up. LESSONS Multimodality treatment remains the most common therapeutic strategy, although no proven algorithm has been established due to the rarity of this disease. Further investigation is needed for providing evidence to standardize the treatment protocol.
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Affiliation(s)
- Li-Yu Chen
- Department of Otorhinolaryngology, Chi Mei Medical Center, Tainan, Taiwan
| | - Shih-Lun Chang
- Department of Otorhinolaryngology, Chi Mei Medical Center, Tainan, Taiwan
- Department of Optometry, Chung Hwa University of Medical Technology, Tainan, Taiwan
| | - Wen-Ying Lee
- Department of Cytopathology, Chi Mei Medical Center, Tainan, Taiwan
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Glöss S, Jurmeister P, Thieme A, Schmid S, Cai WY, Serrette RN, Perner S, Ribbat-Idel J, Pagenstecher A, Bläker H, Keber U, Stadelmann C, Zechel S, Johann PD, Hasselblatt M, Paulus W, Thomas C, Dohmen H, Baumhoer D, Frank S, Agaimy A, Schüller U, Vasudevaraja V, Snuderl M, Liu CZ, Pfister DG, Jungbluth AA, Ghossein RA, Xu B, Capper D, Dogan S. IDH2 R172 Mutations Across Poorly Differentiated Sinonasal Tract Malignancies: Forty Molecularly Homogenous and Histologically Variable Cases With Favorable Outcome. Am J Surg Pathol 2021; 45:1190-1204. [PMID: 34265800 PMCID: PMC8373679 DOI: 10.1097/pas.0000000000001697] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
IDH2 R172 mutations occur in sinonasal undifferentiated carcinoma (SNUC), large-cell neuroendocrine carcinoma (LCNEC), sinonasal adenocarcinomas, and olfactory neuroblastoma (ONB). We performed a clinical, pathologic, and genetic/epigenetic analysis of a large IDH2-mutated sinonasal tumor cohort to explore their distinct features. A total 165 sinonasal/skull base tumors included 40 IDH2 mutants studied by light microscopy, immunohistochemistry, and genome-wide DNA methylation, and 125 IDH2 wild-type tumors used for comparison. Methylation profiles were analyzed by unsupervised hierarchical clustering, t-distributed stochastic neighbor embedding dimensionality reduction and assessed for copy number alterations (CNA). Thirty-nine histologically assessable cases included 25 (64.1%) SNUC, 8 (20.5%) LCNEC, 2 (5.1%) poorly differentiated adenocarcinomas, 1 (2.7%) ONB, and 3 (7.7%) IDH2-mutated tumors with ONB features. All cases were high-grade showing necrosis (82.4%), prominent nucleoli (88.9%), and median 21 mitoses/10 HPFs. AE1/AE3 and/or CAM 5.2 were positive in all and insulinoma-associated protein 1 (INSM1) in 80% cases. All IDH2 mutants formed one distinct group by t-distributed stochastic neighbor embedding dimensionality reduction separating from all IDH2 wild-type tumors. There was no correlation between methylation clusters and histopathologic diagnoses. Recurrent CNA included 1q gain (79.3%), 17p loss (75.9%), and 17q gain (58.6%). No CNA differences were observed between SNUC and LCNEC. IDH2 mutants showed better disease-specific survival than SMARCB1-deficient (P=0.027) and IDH2 wild-type carcinomas overall (P=0.042). IDH2-mutated sinonasal tumors are remarkably homogeneous at the molecular level and distinct from IDH2 wild-type sinonasal malignancies. Biology of IDH2-mutated sinonasal tumors might be primarily defined by their unique molecular fingerprint rather than by their respective histopathologic diagnoses.
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Affiliation(s)
- Stefanie Glöss
- Charité Universitätsmedizin Berlin, corporate member of Free University Berlin and Humboldt University Berlin, and Berlin Institute of Health, Department of Neuropathology, Berlin, Germany
| | - Philipp Jurmeister
- Charité Universitätsmedizin Berlin, corporate member of Free University Berlin and Humboldt University Berlin, and Berlin Institute of Health, Department of Pathology, Berlin, Germany
- Berlin Institute of Health, 10178 Berlin, Germany
| | - Anne Thieme
- Charité Universitätsmedizin Berlin, corporate member of Free University Berlin and Humboldt University Berlin, and Berlin Institute of Health, Department of Neuropathology, Berlin, Germany
- German Cancer Consortium (DKTK), Partner Site Berlin, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Simone Schmid
- Charité Universitätsmedizin Berlin, corporate member of Free University Berlin and Humboldt University Berlin, and Berlin Institute of Health, Department of Neuropathology, Berlin, Germany
| | - Wei Y. Cai
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Rene N. Serrette
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Sven Perner
- Institute of Pathology, University of Luebeck and University Hospital Schleswig-Holstein, 23538 Luebeck, Germany
| | - Julika Ribbat-Idel
- Institute of Pathology, University of Luebeck and University Hospital Schleswig-Holstein, 23538 Luebeck, Germany
| | - Axel Pagenstecher
- Department of Neuropathology, Philipps University and University Hospital of Marburg, Baldingerstrasse, 35043, Marburg, Germany
| | - Hendrik Bläker
- Charité Universitätsmedizin Berlin, corporate member of Free University Berlin and Humboldt University Berlin, and Berlin Institute of Health, Department of Pathology, Berlin, Germany
- Department of Pathology, University Hospital Leipzig, Leipzig, Germany
| | - Ursula Keber
- Department of Neuropathology, Philipps University and University Hospital of Marburg, Baldingerstrasse, 35043, Marburg, Germany
| | - Christine Stadelmann
- Department of Neuropathology, University Medical Center Göttingen, Göttingen, Germany
| | - Sabrina Zechel
- Department of Neuropathology, University Medical Center Göttingen, Göttingen, Germany
| | - Pascal D Johann
- Hopp-Children’s Cancer Center (KiTZ), Heidelberg, Germany
- Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany
| | - Martin Hasselblatt
- Institute of Neuropathology, University Hospital Muenster, Muenster, Germany
| | - Werner Paulus
- Institute of Neuropathology, University Hospital Muenster, Muenster, Germany
| | - Christian Thomas
- Institute of Neuropathology, University Hospital Muenster, Muenster, Germany
| | - Hildegard Dohmen
- Department of Neuropathology, Justus-Liebig-University and University Hospital of Giessen, Giessen, Germany
| | - Daniel Baumhoer
- Bone Tumor Reference Center at the Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, 4031 Basel, Switzerland
| | - Stephan Frank
- Department of Pathology, University Hospital Basel, Basel, Switzerland
| | - Abbas Agaimy
- Institute of Pathology, Friedrich-Alexander-University and University Hospital Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Ulrich Schüller
- Institute of Neuropathology, University Medical Center, Hamburg-Eppendorf, Hamburg, Germany
- Research Institute Children’s Cancer Center, Hamburg, Germany
- Department of Pediatric Hematology and Oncology, University Medical Center, Hamburg-Eppendorf, Hamburg, Germany
| | - Varshini Vasudevaraja
- Department of Pathology, NYU Langone Health and School of Medicine, New York, NY, USA
| | - Matija Snuderl
- Department of Pathology, NYU Langone Health and School of Medicine, New York, NY, USA
- Laura and Isaac Perlmutter Cancer Center, NYU Langone Health and School of Medicine, New York, NY, USA
| | - Cheng Z. Liu
- Department of Pathology, NYU Langone Health and School of Medicine, New York, NY, USA
| | - David G. Pfister
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Achim A. Jungbluth
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Ronald A. Ghossein
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Bin Xu
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - David Capper
- Charité Universitätsmedizin Berlin, corporate member of Free University Berlin and Humboldt University Berlin, and Berlin Institute of Health, Department of Neuropathology, Berlin, Germany
- German Cancer Consortium (DKTK), Partner Site Berlin, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Snjezana Dogan
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
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Ting CH, Wang TY, Wu PS. Insulinoma-associated Protein 1 Expression and Its Diagnostic Significance in Female Genital Tract Neuroendocrine Carcinomas. Int J Gynecol Pathol 2021; 40:452-459. [PMID: 33323849 DOI: 10.1097/pgp.0000000000000722] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Neuroendocrine carcinomas (NECs) are rare, but aggressive malignant tumors of the female genital tract, especially in the uterine the cervix. Beside histologic morphology, positivity of neuroendocrine markers with immunohistochemistry plays an important role in diagnosis of NECs. Insulinoma-associated protein 1 (INSM1) is a novel marker reported to be widely expressed in a variety of neuroendocrine tumors. A previous study also suggested INSM1 has superior performance to conventional neuroendocrine markers in cervical NECs. In our present study, comparison between immunomarkers was performed in female genital tract NECs. Forty-nine patients with gynecologic NECs (4 vagina, 39 cervix, 5 endometrium, 1 ovary) were included from 1993 to 2019 at our center. Immunohistochemistry was performed with INSM1, CD56, synaptophysin (SYN), chromogranin-A (CgA), and thyroid transcription factor 1 (TTF1). The results show INSM1 has superior sensitivity and intensity compared with CD56, SYN, CgA, and TTF1 in cervical small cell NECs, but not in large cell NECs. In contrast to cervical NECs, INSM1 immunohistochemistry shows only focal and weak staining in endometrial NECs. Our result suggested INSM1 is a sensitive marker which can be used as first-line test in histologic suspicious cervical cases, especially small cell NECs. However, negative INSM1 stain does not exclude the possibility of NECs. In endometrial NECs, conventional panel with CD56, SYN, CgA has better diagnostic performance than INSM1 alone.
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Li H, Hardin H, Zaeem M, Huang W, Hu R, Lloyd RV. LncRNA expression and SDHB mutations in pheochromocytomas and paragangliomas. Ann Diagn Pathol 2021; 55:151801. [PMID: 34461576 DOI: 10.1016/j.anndiagpath.2021.151801] [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: 07/09/2021] [Accepted: 07/14/2021] [Indexed: 12/19/2022]
Abstract
Although pheochromocytomas and paragangliomas (PPGLs) are usual low-grade neoplasms, the metastatic forms of these lesions are associated with high morbidity and mortality. Recent studies have discovered multiple aberrantly expressed long non-coding RNAs (lncRNAs) in cancers that may have regulatory roles in tumor pathogenesis and metastasis; however, the roles of some lncRNAs in PPGLs are still unknown. The expression levels of lncRNAs including metastasis-associated lung adenocarcinoma transcript (MALAT1), prostate cancer antigen 3 (PCA3), and HOX transcript antisense intergenic RNA (HOTAIR) in PPGLs were analyzed by in situ hybridization, using two tissue microarrays (TMAs). The pheochromocytoma (PCC) TMA consisted of normal adrenal medulla (N = 25), non-metastatic PCCs (N = 76) and metastatic PCCs (N = 5) while the paraganglioma (PGL) TMA had 73 non-metastatic PGLs and 5 metastatic PGLs. Immunohistochemical staining was performed on all samples with an anti-SDHB antibody. The correlations between lncRNA expression, loss of SDHB expression and clinical characteristics including tumor progression and disease prognosis were investigated. The expression levels of MALAT1 and PCA3 were significantly elevated (2.5-3.9 folds) in both non-metastatic and metastatic PCCs compared to normal adrenal medulla, although there were no significant differences between the non-metastatic and metastatic neoplasms. In contrast to non-metastatic PGLs, metastatic PGLs had significantly upregulated expression of MALAT1, PCA3, and HOTAIR. SDHB loss was more frequently observed in PGLs (25 of 78), especially in metastatic PGLs (5 of 5), compared to PCCs (2 of 81) and in 0 of 5 metastatic PCCs. Patients with SDHB loss, in contrast to SDHB retained, were younger at diagnosis, had higher rates of tumor recurrence, metastatic disease, and mortality. In addition, PGLs with SDHB loss had significantly increased expression of PCA3 compared to tumors with intact SDHB expression. Our findings suggest that specific lncRNAs may be involved in the SDHx signaling pathways in the tumorigenesis and in the development of PPGL.
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Affiliation(s)
- Huihua Li
- Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, WI, USA.
| | - Heather Hardin
- Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, WI, USA
| | - Misbah Zaeem
- Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, WI, USA
| | - Wei Huang
- Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, WI, USA
| | - Rong Hu
- Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, WI, USA
| | - Ricardo V Lloyd
- Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, WI, USA.
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Lymphoid Enhancer Binding Factor 1 (LEF1) and Paired Box Gene 8 (PAX8): A Limited Immunohistochemistry Panel to Distinguish Solid Pseudopapillary Neoplasms and Pancreatic Neuroendocrine Tumors. Appl Immunohistochem Mol Morphol 2021; 28:776-780. [PMID: 32723981 DOI: 10.1097/pai.0000000000000830] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Solid pseudopapillary neoplasms (SPNs) and pancreatic neuroendocrine tumors (PanNETs) are distinctive entities. However, due to overlapping morphologies, distinguishing them remains a diagnostic challenge. Our study investigates the utility of immunohistochemistry for nuclear lymphoid enhancer binding factor 1 (LEF1) and paired box gene 8 (PAX8) in differentiating these 2 entities. LEF1 and PAX8 immunohistochemistry were performed on fine-needle aspiration cell blocks and surgical resection specimens diagnosed as SPN or PanNET at our institution from January 2007 to August 2016. Eight SPN and 25 PanNET cell blocks and 17 SPN and 34 PanNET surgical resection specimens were examined. On cell blocks, positive staining for LEF1 had high frequency, sensitivity, and specificity for SPN (88%, 88%, and 88%) as did positive staining for PAX8 for PanNET (76%, 76%, and 75%). The findings on surgical resection specimens were consistent with those from cell blocks (LEF1+ in SPN: 100%, 100%, and 97%; PAX8+ in PanNET: 59%, 59%, and 100%). A combined LEF1+/PAX8- phenotype showed high sensitivity and specificity for SPN (cell block: 63% and 100%; surgical specimen: 100% and 98%) as did a LEF1-/PAX8+ phenotype for PanNET (cell block: 64% and 100%; surgical specimen: 59% and 100%). SPN and PanNET exhibit opposite immunophenotypic profiles with LEF1+/PAX8- in SPN and LEF1-/PAX8+ in PanNET. The combination of these 2 stains provides an effective means of distinguishing these 2 entities.
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Insulinoma-associated Protein 1 (INSM1) Expression in Small Cell Neuroendocrine Carcinoma of the Urinary Tract. Appl Immunohistochem Mol Morphol 2021; 28:687-693. [PMID: 31876605 DOI: 10.1097/pai.0000000000000824] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Clinical guidelines state that neoadjuvant chemotherapy should be administered before surgery in muscle invasive urinary bladder small cell neuroendocrine carcinoma. Recently described marker insulinoma-associated protein 1 (INSM1) has been reported to be sensitive and specific for neuroendocrine differentiation, however, its efficacy in urinary tract small cell carcinoma is not well established. This study examines immunohistochemical expression of INSM1 on whole tissue sections of urinary tract small cell neuroendocrine carcinoma and compares INSM1 expression with established neuroendocrine markers. Immunohistochemical stains for CD56, INSM1, synaptophysin, and chromogranin were performed on 32 cases of small cell neuroendocrine carcinoma of the bladder. Staining was scored for intensity (0: no staining; 1: weak; 2: moderate; 3: strong) and proportion of cells stained (0: 0%; 1: >0% to ≤25%; 2: >25% to ≤50%; 3: >50% to ≤75%; 4: >75% to 100%). INSM1 was positive (intensity 1 to 3 or proportion 1 to 4) in 87% (28/32) of cases (20 with intensity 2 to 3, 17 with proportion 3 to 4). CD56, synaptophysin, and chromogranin were positive in 75% (24/32), 60% (19/32), and 44% (14/32) of cases, respectively. INSM1 was negative (n=4) or only showed weak intensity staining (n=7) in 34% (11/32) of cases. INSM1 is a sensitive marker of small cell neuroendocrine differentiation of the urinary tract. However, this study suggests that optimal utilization of INSM1 would be inclusion in a limited panel of stains rather than as a stand-alone screening marker given that it is negative or only shows weak intensity staining in a significant proportion of cases.
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López F, Mäkitie A, de Bree R, Franchi A, de Graaf P, Hernández-Prera JC, Strojan P, Zidar N, Strojan Fležar M, Rodrigo JP, Rinaldo A, Centeno BA, Ferlito A. Qualitative and Quantitative Diagnosis in Head and Neck Cancer. Diagnostics (Basel) 2021; 11:diagnostics11091526. [PMID: 34573868 PMCID: PMC8466857 DOI: 10.3390/diagnostics11091526] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 08/14/2021] [Accepted: 08/20/2021] [Indexed: 12/11/2022] Open
Abstract
The diagnosis is the art of determining the nature of a disease, and an accurate diagnosis is the true cornerstone on which rational treatment should be built. Within the workflow in the management of head and neck tumours, there are different types of diagnosis. The purpose of this work is to point out the differences and the aims of the different types of diagnoses and to highlight their importance in the management of patients with head and neck tumours. Qualitative diagnosis is performed by a pathologist and is essential in determining the management and can provide guidance on prognosis. The evolution of immunohistochemistry and molecular biology techniques has made it possible to obtain more precise diagnoses and to identify prognostic markers and precision factors. Quantitative diagnosis is made by the radiologist and consists of identifying a mass lesion and the estimation of the tumour volume and extent using imaging techniques, such as CT, MRI, and PET. The distinction between the two types of diagnosis is clear, as the methodology is different. The accurate establishment of both diagnoses plays an essential role in treatment planning. Getting the right diagnosis is a key aspect of health care, and it provides an explanation of a patient’s health problem and informs subsequent decision. Deep learning and radiomics approaches hold promise for improving diagnosis.
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Affiliation(s)
- Fernando López
- Department of Otorhinolaryngology, Head and Neck Surgery, Hospital Universitario Central de Asturias, 33011 Oviedo, Spain;
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Instituto Universitario de Oncología del Principado de Asturias (IUOPA), University of Oviedo CIBERONC-ISCIII, 33011 Oviedo, Spain
- Correspondence:
| | - Antti Mäkitie
- Department of Otorhinolaryngology–Head and Neck Surgery, University of Helsinki and Helsinki University Hospital, 00029 Helsinki, Finland;
| | - Remco de Bree
- Department of Head and Neck Surgical Oncology, University Medical Center Utrecht, 3584CX Utrecht, The Netherlands;
| | - Alessandro Franchi
- Department of Translational Research, School of Medicine, University of Pisa, 56124 Pisa, Italy;
| | - Pim de Graaf
- Cancer Center Amsterdam, Department of Radiology and Nuclear Medicine, Amsterdam UMC, Vrije Universiteit Amsterdam, 1081 Amsterdam, The Netherlands;
| | | | - Primoz Strojan
- Department of Radiation Oncology, Institute of Oncology, 1000 Ljubljana, Slovenia;
| | - Nina Zidar
- Department of Head and Neck Pathology, Faculty of Medicine, Institute of Pathology, University of Ljubljana, 1000 Ljubljana, Slovenia;
| | - Margareta Strojan Fležar
- Department of Cytopathology, Faculty of Medicine, Institute of Pathology, University of Ljubljana, 1000 Ljubljana, Slovenia;
| | - Juan P. Rodrigo
- Department of Otorhinolaryngology, Head and Neck Surgery, Hospital Universitario Central de Asturias, 33011 Oviedo, Spain;
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Instituto Universitario de Oncología del Principado de Asturias (IUOPA), University of Oviedo CIBERONC-ISCIII, 33011 Oviedo, Spain
| | | | - Barbara A. Centeno
- Department of Pathology, Moffitt Cancer Center, Tampa, FL 33612, USA; (J.C.H.-P.); (B.A.C.)
| | - Alfio Ferlito
- Coordinator of the International Head and Neck Scientific Group, 35100 Padua, Italy;
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Dridi M, Boutonnat J, Dumollard JM, Peoc’h M, Karpathiou G. INSM1 Expression in Chordomas. Am J Clin Pathol 2021; 156:334-339. [PMID: 33629710 DOI: 10.1093/ajcp/aqaa250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES Chordomas are rare malignant tumors with a broad differential diagnosis, including chondrosarcomas and metastatic carcinomas. Recently, insulinoma-associated protein 1 (INSM1) has gained great interest regarding the diagnosis of neuroendocrine tumors but also extraskeletal myxoid chondrosarcomas. However, its expression in chordomas remains largely unknown. METHODS We retrospectively examined 57 chordomas for INSM1 expression. RESULTS INSM1 expression was found in only 5% of tumors. CONCLUSIONS This marker is rarely expressed in this type of tumor, raising questions about neuroendocrine differentiation.
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Affiliation(s)
- Maroa Dridi
- Pathology Department, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - Jean Boutonnat
- Pathology Department, University Hospital of Grenoble, Grenoble, France
| | - Jean Marc Dumollard
- Pathology Department, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - Michel Peoc’h
- Pathology Department, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - Georgia Karpathiou
- Pathology Department, University Hospital of Saint-Etienne, Saint-Etienne, France
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Wang M, Abi-Raad R, Baldassarri R, Adeniran AJ, Cai G. Expression of insulinoma-associated protein 1 in non-small cell lung cancers: a diagnostic pitfall for neuroendocrine tumors. Hum Pathol 2021; 115:104-111. [PMID: 34216697 DOI: 10.1016/j.humpath.2021.06.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 06/23/2021] [Accepted: 06/24/2021] [Indexed: 11/26/2022]
Abstract
Insulinoma-associated protein 1 (INSM1) has been reported as a highly sensitive and specific marker of neuroendocrine tumors. INSM1 expression has also been reported, although uncommonly, in non-neuroendocrine tumors. This study aimed to elucidate potential nonspecific INSM1 expression in non-small cell non-neuroendocrine lung cancers (NSCNELCs), especially in squamous cell carcinomas (SqCCs) with basaloid features to avoid diagnostic pitfalls. Tissue microarrays (TMAs) were constructed for 324 NSCNELCs, including 196 adenocarcinomas (AdCs), 86 SqCCs, and 42 other NSCNELCs. In addition, 38 whole-tissue sections of SqCCs with basaloid features were examined. INSM1 immunostain was semiquantitively evaluated based on the percentage of nuclear staining in tumor cells, categorized as negative, focal (<10% tumor cells), and positive (>10% tumor cells). Among 324 TMAs, 6.2% (20/324) were positive for INSM1, 4.9% (16/324) were focal, and 88.9% (289/34) were negative. Of 196 AdCs, 5.1% (10/196) were positive for INSM1, 4.7% (9/196) were focal, and 90.3% (177/196) were negative. Of 86 SqCCs, 9.3% (8/86) were positive for INSM1, 5.8% (5/86) were focal, and 84.9% (73/86) were negative. Of the remaining 42 NSCNELCs, 4.8% (2/42) were positive for INSM1, 4.8% (2/42) were focal, and 90.4% (38/44) were negative. Among 38 cases of whole-tissue sections of SqCCs with basaloid features, 15.8% (6/38) were positive for INSM1, 18.4% (7/38) were focal, and 65.8% (25/38) were negative. Our study demonstrates that INSM1 is expressed in a significant subset of NSCNELCs, suggesting caution in interpreting INSM1 staining, especially with limited samples. INSM1 should not be used as a stand-alone neuroendocrine marker in differentiating primary lung tumors.
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Affiliation(s)
- Minhua Wang
- Department of Pathology, Yale University School of Medicine, New Haven, CT, 06510, USA.
| | - Rita Abi-Raad
- Department of Pathology, Yale University School of Medicine, New Haven, CT, 06510, USA
| | - Rebecca Baldassarri
- Department of Pathology, Yale University School of Medicine, New Haven, CT, 06510, USA
| | - Adebowale J Adeniran
- Department of Pathology, Yale University School of Medicine, New Haven, CT, 06510, USA
| | - Guoping Cai
- Department of Pathology, Yale University School of Medicine, New Haven, CT, 06510, USA; Yale Cancer Center, Yale University School of Medicine, New Haven, CT, 06510, USA
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Pseudoendocrine Sarcoma: Clinicopathologic Analysis of 23 Cases of a Distinctive Soft Tissue Neoplasm With Metastatic Potential, Recurrent CTNNB1 Mutations, and a Predilection for Truncal Locations. Am J Surg Pathol 2021; 46:33-43. [PMID: 34081037 DOI: 10.1097/pas.0000000000001751] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The number of recognized epithelioid soft tissue neoplasms continues to increase and includes epithelioid schwannoma, sclerosing epithelioid fibrosarcoma, and emerging entities such as sarcomas with GLI1 alterations. Here, we describe 23 cases of a previously unrecognized entity, provisionally termed "pseudoendocrine sarcoma." Pseudoendocrine sarcoma is a rare, distinctive tumor of uncertain lineage with a predilection for paravertebral soft tissue in older adults. Fifteen patients (65%) were male and 8 were female. Age at presentation ranged from 29 to 78 years (median: 62 y). Nineteen tumors (83%) occurred in truncal locations, including 15 tumors (65%) in paravertebral soft tissue; other locations included the posterior head (2 tumors), thigh (1), and orbit (1). Tumor size ranged from 2 to 19 cm (median: 6.35 cm). Pseudoendocrine sarcoma is composed of sheets, trabeculae, and nests of epithelioid or ovoid cells with indistinct borders, palely eosinophilic cytoplasm, and highly monomorphic, round nuclei with speckled chromatin. Pseudoglandular architecture was at least focally present in 16 tumors (70%), large extracellular hyaline globules were identified in 12 tumors (52%), and psammomatous calcifications were present in 8 (35%). Metaplastic ossification was identified in 2 tumors, and myxoid stroma was present in 1. Lymphovascular invasion was present in 5 of 18 tumors (28%). Immunohistochemistry demonstrated that most tumors showed nuclear positivity for β-catenin (20/21 tumors; 95%), and some showed at least focal positivity for S-100 (9/22; 41%), desmin (3/8; 38%), or CD34 (2/8; 25%). All tumors were negative for neuroendocrine and epithelial markers, including synaptophysin (21 tumors), chromogranin (19), INSM1 (4), pan-K (16), CAM5.2 (13), AE1/AE3 (6), epithelial membrane antigen (20), and E-cadherin (13). DNA sequencing detected CTNNB1 point mutations in all 6 sequenced tumors: D32H, S33C, S33F, S37A, S37C, and S37F. RNA sequencing was negative for gene fusions in all 6 sequenced tumors. Clinical follow-up was available for 17 patients (74%; range: 4 mo to 20 y; median: 3.5 y), including 14 patients with >1 year of follow-up. Six of 14 patients with long-term follow-up experienced local recurrence (43%, at intervals of 3 to 6 y). One tumor showed a local lymph node metastasis within the primary excision specimen, and 3 patients developed distant lung metastases (21%). No patient died of the disease as yet. Despite its bland morphology and resemblance to the well-differentiated neuroendocrine tumor, pseudoendocrine sarcoma is best considered an intermediate-grade sarcoma, given its pathologic characteristics and clinical behavior.
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Insulinoma-associated Protein 1 (INSM1) in Thoracic Tumors is Less Sensitive but More Specific Compared With Synaptophysin, Chromogranin A, and CD56. Appl Immunohistochem Mol Morphol 2021; 28:237-242. [PMID: 30358615 DOI: 10.1097/pai.0000000000000715] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVE Recognition of neuroendocrine differentiation is important for tumor classification and treatment stratification. To detect and confirm neuroendocrine differentiation, a combination of morphology and immunohistochemistry is often required. In this regard, synaptophysin, chromogranin A, and CD56 are established immunohistochemical markers. Insulinoma-associated protein 1 (INSM1) has been suggested as a novel stand-alone marker with the potential to replace the current standard panel. In this study, we compared the sensitivity and specificity of INSM1 and established markers. MATERIALS AND METHODS A cohort of 493 lung tumors including 112 typical, 39 atypical carcinoids, 77 large cell neuroendocrine carcinomas, 144 small cell lung cancers, 30 thoracic paragangliomas, 47 adenocarcinomas, and 44 squamous cell carcinomas were selected and tissue microarrays were constructed. Synaptophysin, chromogranin A, CD56, and INSM1 were stained on all cases and evaluated manually as well as with an analysis software. Positivity was defined as ≥1% stained tumor cells in at least 1 of 2 cores per patient. RESULTS INSM1 was positive in 305 of 402 tumors with expected neuroendocrine differentiation (typical and atypical carcinoids, large cell neuroendocrine carcinomas, small cell lung cancers, and paraganglioma; sensitivity: 76%). INSM1 was negative in all but 1 of 91 analyzed non-neuroendocrine tumors (adenocarcinomas, squamous cell carcinomas; specificity: 99%). All conventional markers, as well as their combination, had a higher sensitivity (97%) and a lower specificity (78%) for neuroendocrine differentiation compared with INSM1. CONCLUSIONS Although INSM1 might be a meaningful adjunct in the differential diagnosis of neuroendocrine neoplasias, a general uncritical vote for replacing the traditional markers by INSM1 may not be justified.
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