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Troncoso I, Brown J, Isla C, Lajara JM, Ebner M, Fehrmann-Cartes K. Case report: Abdominal mesothelioma in Atelerix albiventris. Front Vet Sci 2024; 11:1341815. [PMID: 38807940 PMCID: PMC11131417 DOI: 10.3389/fvets.2024.1341815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 04/25/2024] [Indexed: 05/30/2024] Open
Abstract
Hedgehogs, as exotic species, are more susceptible to various neoplastic conditions affecting diverse bodily systems, particularly the tegumentary, hemolymphatic, and digestive systems. Among these conditions, epithelial tumors are the most prevalent, followed by round cell tumors and mesenchymal tumors. A striking characteristic is the malignant nature of over 8% of these tumors, leading to a generally unfavorable prognosis. This study aims to present a unique case involving a 2.5 year-old male African pygmy hedgehog in Concepción, Biobío District, Chile, diagnosed with a mesenchymal neoplasia originating from mesothelial cells. The hedgehog presented to the veterinary clinic with acute abdominal pain, prompting ultrasound imaging, and comprehensive cytological, histopathological, and immunohistochemical analyses. During abdominal ultrasound, a mass was observed, and its cytological examination revealed the presence of malignant cells. The histopathological examination unveiled a diffuse mesothelial cell tissue interwoven with abundant fibrous tissue and small cysts containing serous fluid, all enveloped by flattened or cuboidal cells of mesothelial origin. Immunohistochemistry further confirmed the diagnosis, demonstrating positive immunostaining for calretinin and mesothelin markers, corroborating the diagnosis of fibrous malignant peritoneal mesothelioma. This case highlights the complexity of neoplastic conditions in hedgehogs and emphasizes the importance of multimodal diagnostic approaches for accurate identification and understanding of these rare diseases.
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Affiliation(s)
- Ignacio Troncoso
- Facultad de Medicina Veterinaria y Agronomía, Universidad de Las Américas, Concepción, Chile
- Facultad de Recursos Naturales y Medicina Veterinaria, Universidad Santo Tomás, Sede Talca, Concepción, Chile
- Servicio Patológico y Anestesiológico veterinario (SERPAVET), Concepción, Chile
| | - John Brown
- Facultad de Medicina Veterinaria y Agronomía, Universidad de Las Américas, Concepción, Chile
| | - Carla Isla
- Facultad de Medicina Veterinaria y Agronomía, Universidad de Las Américas, Concepción, Chile
| | | | - Max Ebner
- Servicio Patológico y Anestesiológico veterinario (SERPAVET), Concepción, Chile
| | - Karen Fehrmann-Cartes
- Facultad de Medicina Veterinaria y Agronomía, Universidad de Las Américas, Concepción, Chile
- Núcleo de Investigaciones Aplicadas en Ciencias Veterinarias y Agronómicas, Universidad de Las Américas, Concepción, Chile
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Klebe S, Judge M, Brcic L, Dacic S, Galateau-Salle F, Nicholson AG, Roggli V, Nowak AK, Cooper WA. Mesothelioma in the pleura, pericardium and peritoneum: Recommendations from the International Collaboration on Cancer Reporting (ICCR). Histopathology 2024; 84:633-645. [PMID: 38044849 DOI: 10.1111/his.15106] [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: 08/27/2023] [Revised: 10/19/2023] [Accepted: 11/12/2023] [Indexed: 12/05/2023]
Abstract
AIMS Mesothelioma is a rare malignancy of the serosal membranes that is commonly related to exposure to asbestos. Despite extensive research and clinical trials, prognosis to date remains poor. Consistent, comprehensive and reproducible pathology reporting form the basis of all future interventions for an individual patient, but also ensures that meaningful data are collected to identify predictive and prognostic markers. METHODS AND RESULTS This article details the International Collaboration on Cancer Reporting (ICCR) process and the development of the international consensus mesothelioma reporting data set. It describes the 'core' and 'non-core' elements to be included in pathology reports for mesothelioma of all sites, inclusive of clinical, macroscopic, microscopic and ancillary testing considerations. An international expert panel consisting of pathologists and a medical oncologist produced a set of data items for biopsy and resection specimens based on a critical review and discussion of current evidence, and in light of the changes in the 2021 WHO Classification of Tumours. The commentary focuses particularly upon new entities such as mesothelioma in situ and provides background on relevant and essential ancillary testing as well as implementation of the new requirement for tumour grading. CONCLUSION We recommend widespread and consistent implementation of this data set, which will facilitate accurate reporting and enhance the consistency of data collection, improve the comparison of epidemiological data, support retrospective research and ultimately help to improve clinical outcomes. To this end, all data sets are freely available worldwide on the ICCR website (www.iccr-cancer.org/data-sets).
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Affiliation(s)
- Sonja Klebe
- Department of Anatomical Pathology, Flinders University and SA Pathology, Adelaide, SA, Australia
| | - Meagan Judge
- International Collaboration on Cancer Reporting, Sydney, NSW, Australia
| | - Luka Brcic
- Diagnostic and Research Institute of Pathology, Medical University of Graz, Graz, Austria
| | - Sanja Dacic
- Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | | | - Andrew G Nicholson
- Royal Brompton and Harefield Hospitals, Guy's and St Thomas' NHS Foundation Trust, London, UK
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Victor Roggli
- Department of Pathology, Duke University Medical Center, Durham, NC, USA
| | - Anna K Nowak
- Medical School, University of Western Australia, Crawley, WA, Australia
| | - Wendy A Cooper
- Department of Tissue Pathology and Diagnostic Oncology, NSW Health Pathology, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
- Sydney Medical School, University of Sydney, Camperdown, NSW, Australia
- Discipline of Pathology, School of Medicine, Western Sydney University, Sydney, NSW, Australia
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3
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Sejben A, Pancsa T, Tiszlavicz L, Furák J, Paróczai D, Zombori T. Highlighting the immunohistochemical differences of malignant mesothelioma subtypes via case presentations. Thorac Cancer 2023; 14:857-863. [PMID: 36808895 PMCID: PMC10067356 DOI: 10.1111/1759-7714.14827] [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: 12/06/2022] [Revised: 02/07/2023] [Accepted: 02/08/2023] [Indexed: 02/22/2023] Open
Abstract
Malignant mesothelioma (MM) is a rare tumor of mesothelial cells, with an increasing incidence both in developed and developing countries. MM has three major histological subtypes, in order of frequency, according to the World Health Organization (WHO) Classification of 2021: epithelioid, biphasic, and sarcomatoid MM. Distinction may be a challenging task for the pathologist, due to the unspecific morphology. Here, we present two cases of diffuse MM subtypes to emphasize the immunohistochemical (IHC) differences, and to facilitate diagnostic difficulties. In our first case of epithelioid mesothelioma, the neoplastic cells showed cytokeratin 5/6 (CK5/6), calretinin, and Wilms-tumor-1 (WT1) expression, while remaining negative with thyroid transcription factor-1 (TTF-1). BRCA1 associated protein-1 (BAP1) negativity was seen in the neoplastic cells' nucleus, reflecting loss of the tumor suppressor gene. In the second case of biphasic mesothelioma, expression of epithelial membrane antigen (EMA), CKAE1/AE3, and mesothelin was observed, while WT1, BerEP4, CD141, TTF1, p63, CD31, calretinin, and BAP1 expressions were not detected. Due to the absence of specific histological features, the differentiation between MM subtypes could be a challenging task. In routine diagnostic work, IHC may be the proper method in distinction. According to our results and literature data, CK5/6, mesothelin, calretinin, and Ki-67 should be applied in subclassification.
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Affiliation(s)
- Anita Sejben
- Department of Pathology, University of Szeged, Szeged, Hungary
| | - Tamás Pancsa
- Department of Pathology, University of Szeged, Szeged, Hungary
| | | | - József Furák
- Department of Surgery, University of Szeged, Szeged, Hungary
| | - Dóra Paróczai
- Department of Pulmonology, University of Szeged, Deszk, Hungary
| | - Tamás Zombori
- Department of Pathology, University of Szeged, Szeged, Hungary
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Monaco SE, Brcic L, Dacic S. State-of-the-art cytology of pleural fluid, focusing on the diagnosis of mesothelioma. Cytopathology 2021; 33:57-64. [PMID: 34467576 DOI: 10.1111/cyt.13055] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 08/02/2021] [Accepted: 08/23/2021] [Indexed: 12/18/2022]
Abstract
Mesothelioma has always been a challenging diagnosis to render in body cavity cytology samples. This review is a timely update on pleural fluid cytology and ancillary studies that should be considered in the diagnosis of mesothelial proliferations, specifically mesotheliomas. Information about new diagnostic approaches and ancillary studies in mesothelioma was obtained from the peer-reviewed literature and the authors' experiences. Although the morphological diagnosis of mesothelioma is fraught with numerous challenges given the overlap with other diagnostic entities, there are a variety of immunohistochemical and fluorescence in situ hybridization studies available to help in determining mesothelial origin and in distinguishing malignant proliferations from the more common benign or reactive mesothelial proliferations. Although ancillary studies can be helpful, there are important pitfalls to be aware of when interpreting these cases, and this review highlights some of the challenges that require caution.
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Affiliation(s)
- Sara E Monaco
- System Director of Cytopathology, Department of Laboratory Medicine, Geisinger Medical Center, Danville, PA, USA
| | - Luka Brcic
- Medical University of Graz Institute of Pathology, Graz, Austria
| | - Sanja Dacic
- Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
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Rossi G, Davoli F, Poletti V, Cavazza A, Lococo F. When the Diagnosis of Mesothelioma Challenges Textbooks and Guidelines. J Clin Med 2021; 10:jcm10112434. [PMID: 34070888 PMCID: PMC8198453 DOI: 10.3390/jcm10112434] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 05/25/2021] [Accepted: 05/27/2021] [Indexed: 01/15/2023] Open
Abstract
The diagnosis of malignant mesothelioma (MPM) does not pose difficulties when presenting with usual clinico-radiologic features and morphology. Pathology textbooks and national/international guidelines generally describe the findings of classic MPM, underlining common clinical presentation, the gold standard of sampling techniques, usual morphologic variants, immunohistochemical results of several positive and negative primary antibodies in the differential diagnosis, and the role of novel molecular markers. Nevertheless, MPM often does not follow the golden rules in routine practice, while the literature generally does not sufficiently emphasize unusual features of its manifestation. This gap may potentially create problems for patients in sustaining a difficult diagnosis of MPM in clinical practice and during legal disputes. Indeed, the guidelines accidentally tend to favor the job of lawyers and pathologists defending asbestos-producing industries against patients suffering from MPM characterized by uncommon features. The current review is aimed at underlining the wide spectrum of clinical and radiological presentation of MPM, the possibility to consistently use cytology for diagnostic intent, the aberrant immunohistochemical expression using so-called specific negative and positive primary antibodies, and finally proposing some alternative and more unbiased approaches to the diagnosis of MPM.
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Affiliation(s)
- Giulio Rossi
- Anatomy and Pathological Histology Unit, Infermi Hospital, 47923 Rimini, Italy
- Operative Unit of Pathologic Anatomy, AUSL Romagna, Santa Maria delle Croci Hospital of Ravenna, 47923 Rimini, Italy
- Correspondence: ; Tel.: +39-0544-285-368; Fax: +39-054-4285-758
| | - Fabio Davoli
- Thoracic Surgery Unit, Department of Thoracic Diseases, AUSL Romagna, S. Maria delle Croci Hospital, 48121 Ravenna, Italy;
| | - Venerino Poletti
- Pulmonology Unit, Thoracic Diseases Department, G.B. Morgagni Hospital, 47121 Forlì, Italy;
- Department of Respiratory Diseases and Allergy, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Alberto Cavazza
- Department of Pathology, Arcispedale S Maria Nuova, IRCCS Reggio Emilia, 42124 Reggio Emilia, Italy;
| | - Filippo Lococo
- Department of Thoracic Surgery, Faculty of Medicine, University Cattolica del Sacro Cuore, 20123 Rome, Italy;
- Thoracic Surgery Unit, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
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Abstract
Despite multiple diagnostic toolkits, the diagnosis of diffuse malignant pleural mesothelioma relies primarily on proper histologic assessment. The definitive diagnosis of diffuse malignant pleural mesothelioma is based on the pathologic assessment of tumor tissue, which can be obtained from core biopsy sampling, pleurectomy, or other more extensive resections, such as extrapleural pneumonectomy. Given its rarity and overlapping microscopic features with other conditions, the histologic diagnosis of diffuse malignant pleural mesothelioma is challenging. This review discusses the pathologic features and the differential diagnosis of diffuse malignant pleural mesothelioma, including select diagnostic pitfalls.
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Affiliation(s)
- Yin P Hung
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA 02114, USA
| | - Lucian R Chirieac
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA.
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Beasley MB, Galateau-Salle F, Dacic S. Pleural mesothelioma classification update. Virchows Arch 2021; 478:59-72. [PMID: 33475835 DOI: 10.1007/s00428-021-03031-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 12/23/2020] [Accepted: 01/11/2021] [Indexed: 12/17/2022]
Abstract
The 2015 WHO classification of pleural mesotheliomas includes three major histologic subtypes-epithelioid, sarcomatoid, and biphasic. Recent genomic data has supported the need for a more granular and clinically valid classification beyond the three current subtypes. Because of tumor rarity and overlapping histologic features with other tumor types, diagnostic immunohistochemical work up is essential component in establishing the final diagnosis of mesothelioma. The use of BAP1 and CDKN2A/MTAP improves the diagnostic sensitivity of effusion specimens and are valuable in establishing the diagnosis of epithelioid mesothelioma. The major change in the forthcoming WHO classification is the inclusion of mesothelioma in situ as a diagnostic category. In this review, we discuss recently proposed changes in the histologic classification of pleural mesothelioma, differential diagnosis, and importance of ancillary diagnostic studies.
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Affiliation(s)
- Mary Beth Beasley
- Department of Pathology, Molecular and Cell-Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - Sanja Dacic
- Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, PA, 15213, USA.
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8
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Galateau Salle F, Le Stang N, Tirode F, Courtiol P, Nicholson AG, Tsao MS, Tazelaar HD, Churg A, Dacic S, Roggli V, Pissaloux D, Maussion C, Moarii M, Beasley MB, Begueret H, Chapel DB, Copin MC, Gibbs AR, Klebe S, Lantuejoul S, Nabeshima K, Vignaud JM, Attanoos R, Brcic L, Capron F, Chirieac LR, Damiola F, Sequeiros R, Cazes A, Damotte D, Foulet A, Giusiano-Courcambeck S, Hiroshima K, Hofman V, Husain AN, Kerr K, Marchevsky A, Paindavoine S, Picquenot JM, Rouquette I, Sagan C, Sauter J, Thivolet F, Brevet M, Rouvier P, Travis WD, Planchard G, Weynand B, Clozel T, Wainrib G, Fernandez-Cuesta L, Pairon JC, Rusch V, Girard N. Comprehensive Molecular and Pathologic Evaluation of Transitional Mesothelioma Assisted by Deep Learning Approach: A Multi-Institutional Study of the International Mesothelioma Panel from the MESOPATH Reference Center. J Thorac Oncol 2020; 15:1037-1053. [PMID: 32165206 PMCID: PMC8864581 DOI: 10.1016/j.jtho.2020.01.025] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 01/19/2020] [Accepted: 01/20/2020] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Histologic subtypes of malignant pleural mesothelioma are a major prognostic indicator and decision denominator for all therapeutic strategies. In an ambiguous case, a rare transitional mesothelioma (TM) pattern may be diagnosed by pathologists either as epithelioid mesothelioma (EM), biphasic mesothelioma (BM), or sarcomatoid mesothelioma (SM). This study aimed to better characterize the TM subtype from a histological, immunohistochemical, and molecular standpoint. Deep learning of pathologic slides was applied to this cohort. METHODS A random selection of 49 representative digitalized sections from surgical biopsies of TM was reviewed by 16 panelists. We evaluated BAP1 expression and CDKN2A (p16) homozygous deletion. We conducted a comprehensive, integrated, transcriptomic analysis. An unsupervised deep learning algorithm was trained to classify tumors. RESULTS The 16 panelists recorded 784 diagnoses on the 49 cases. Even though a Kappa value of 0.42 is moderate, the presence of a TM component was diagnosed in 51%. In 49% of the histological evaluation, the reviewers classified the lesion as EM in 53%, SM in 33%, or BM in 14%. Median survival was 6.7 months. Loss of BAP1 observed in 44% was less frequent in TM than in EM and BM. p16 homozygous deletion was higher in TM (73%), followed by BM (63%) and SM (46%). RNA sequencing unsupervised clustering analysis revealed that TM grouped together and were closer to SM than to EM. Deep learning analysis achieved 94% accuracy for TM identification. CONCLUSION These results revealed that the TM pattern should be classified as non-EM or at minimum as a subgroup of the SM type.
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Affiliation(s)
| | - Nolwenn Le Stang
- MESOPATH, MESONAT, MESOBANK Department of BioPathology Centre Leon Berard, Lyon, France
| | - Franck Tirode
- University Claude Bernard Lyon, INSERM, CNRS, Research Cancer Center of Lyon, Centre Léon Bérard, Lyon, France
| | | | - Andrew G Nicholson
- Department of Histopathology, Royal Brompton and Harefield NHS Foundation Trust and National Heart and Lung Institute, Imperial College, London, United Kingdom
| | - Ming-Sound Tsao
- University Health Network, Princess Margaret Cancer Centre and University of Toronto, Department of Laboratory Medicine and Pathobiology, Toronto, Ontario, Canada
| | | | - Andrew Churg
- Columbia University and Department of Pathology Vancouver, Canada
| | - Sanja Dacic
- FISH and Developmental Laboratory at the University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Victor Roggli
- Duke University Medical Center, Department of Pathology, Durham, North Carolina
| | - Daniel Pissaloux
- Department of BioPathology-FISH Laboratory, Centre Leon Berard Lyon, France
| | | | | | - Mary Beth Beasley
- Mount-Sinai Medical Center, Department of Pathology, New York, New York
| | - Hugues Begueret
- CHU Bordeaux, Haut Leveque Hospital, Department of Pathology, Bordeaux, France
| | - David B Chapel
- University of Chicago, Department of Pathology, Chicago, Illinois
| | | | - Allen R Gibbs
- University of Wales, Department of Cellular Pathology, Cardiff, United Kingdom
| | - Sonja Klebe
- Department of Anatomical Pathology, Flinders University, Adelaide, Australia
| | - Sylvie Lantuejoul
- MESOPATH, MESONAT, MESOBANK Department of BioPathology Centre Leon Berard, Lyon, France
| | - Kazuki Nabeshima
- Department of Pathology, Fukuoka University School of Medicine and Hospital, Fukuoka, Japan
| | | | - Richard Attanoos
- University of Wales, Department of Cellular Pathology, Cardiff, United Kingdom
| | | | | | | | - Francesca Damiola
- MESOPATH, MESONAT, MESOBANK Department of BioPathology Centre Leon Berard, Lyon, France
| | - Ruth Sequeiros
- MESOPATH, MESONAT, MESOBANK Department of BioPathology Centre Leon Berard, Lyon, France
| | - Aurélie Cazes
- MESOPATH, MESONAT, MESOBANK Department of BioPathology Centre Leon Berard, Lyon, France; CHU Bichat Department of Pathology, University Paris VII, Paris, France
| | - Diane Damotte
- MESOPATH, MESONAT, MESOBANK Department of BioPathology Centre Leon Berard, Lyon, France; CHU Cochin-Hotel Dieu, Department of Pathology, Paris, France
| | - Armelle Foulet
- MESOPATH, MESONAT, MESOBANK Department of BioPathology Centre Leon Berard, Lyon, France; CH Le Mans, Department of Pathology, Pays de la Loire, France
| | - Sophie Giusiano-Courcambeck
- MESOPATH, MESONAT, MESOBANK Department of BioPathology Centre Leon Berard, Lyon, France; CHU Hospital Nord, Marseille, University Aix-Marseille, Marseille, France
| | - Kenzo Hiroshima
- Tokyo Women's Medical University, Department of Pathology, Tokyo, Japan
| | - Veronique Hofman
- MESOPATH, MESONAT, MESOBANK Department of BioPathology Centre Leon Berard, Lyon, France; Mayo Clinic, Scottsdale, Arizona; CHU Nice, Department of Clinical and Experimental Pathology (LPCE), Nice, France
| | - Aliya N Husain
- University of Chicago, Department of Pathology, Chicago, Illinois
| | - Keith Kerr
- Aberdeen Royal Infirmary, Department of Pathology, Aberdeen, Scotland
| | - Alberto Marchevsky
- Scotland Cedars-Sinai Medical Center, Department of Pathology, Los Angeles, California
| | - Severine Paindavoine
- University Claude Bernard Lyon, INSERM, CNRS, Research Cancer Center of Lyon, Centre Léon Bérard, Lyon, France
| | - Jean Michel Picquenot
- MESOPATH, MESONAT, MESOBANK Department of BioPathology Centre Leon Berard, Lyon, France; Department of Pathology, Henri Becquerel Centre, Rouen, France
| | - Isabelle Rouquette
- MESOPATH, MESONAT, MESOBANK Department of BioPathology Centre Leon Berard, Lyon, France; IUCT-Oncopôle, Department of Pathology, Toulouse, France
| | - Christine Sagan
- MESOPATH, MESONAT, MESOBANK Department of BioPathology Centre Leon Berard, Lyon, France; CHU Nantes, INSERM, Thorax Institute, Hôpital Laënnec CHU Nantes, Nantes, France
| | - Jennifer Sauter
- Memorial Sloan Kettering Cancer Center, Department of Pathology, New York, New York
| | - Francoise Thivolet
- MESOPATH, MESONAT, MESOBANK Department of BioPathology Centre Leon Berard, Lyon, France; Hospices Civils, East Hospital Group, Department of Pathology, Lyon, France
| | - Marie Brevet
- MESOPATH, MESONAT, MESOBANK Department of BioPathology Centre Leon Berard, Lyon, France; Hospices Civils, East Hospital Group, Department of Pathology, Lyon, France
| | - Philippe Rouvier
- CHU Pitié Salpétrière Paris, Department of Pathology, Paris, France
| | - William D Travis
- Memorial Sloan Kettering Cancer Center, Department of Pathology, New York, New York
| | - Gaetane Planchard
- MESOPATH, MESONAT, MESOBANK Department of BioPathology Centre Leon Berard, Lyon, France; Department of Pathology, CHU Caen, Caen, France
| | | | | | | | - Lynnette Fernandez-Cuesta
- Genetic Cancer Susceptibility Group International Agency for Research on Cancer World Health Organization, Lyon, France
| | - Jean-Claude Pairon
- INSERM, UPEC, Faculty of Medicine and CHI Creteil, Professional Pathologies and Environment Department, IST-PE, Creteil, France
| | - Valerie Rusch
- Memorial Sloan Kettering Cancer Center, Department of Thoracic Surgery, New York, New York
| | - Nicolas Girard
- Department of Thoracic Oncology Institute Curie Paris, France and European Reference Network EURACAN, Centre Leon Berard, France
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Chapel DB, Schulte JJ, Husain AN, Krausz T. Application of immunohistochemistry in diagnosis and management of malignant mesothelioma. Transl Lung Cancer Res 2020; 9:S3-S27. [PMID: 32206567 PMCID: PMC7082260 DOI: 10.21037/tlcr.2019.11.29] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Immunohistochemistry plays an indispensable role in accurate diagnosis of malignant mesothelioma, particularly in morphologically challenging cases and in biopsy and cytology specimens, where tumor architecture is difficult or impossible to evaluate. Application of a targeted panel of mesothelial- and epithelial-specific markers permits correct identification of tumor lineage in the vast majority of cases. An immunopanel including two mesothelial markers (calretinin, CK5/6, WT-1, or D2-40) and two epithelial markers (MOC-31 and claudin-4) offers good sensitivity and specificity, with adjustments as appropriate for the differential diagnosis. Once mesothelial lineage is established, malignancy-specific studies can help verify a diagnosis of malignant mesothelioma. BAP1 loss, CDKN2A homozygous deletion, and MTAP loss are highly specific markers of malignancy in a mesothelial lesion, and they attain acceptable diagnostic sensitivity when applied as a diagnostic panel. Novel markers of malignancy, such as 5-hmC loss and increased EZH2 expression, are promising, but have not yet achieved widespread clinical adoption. Some diagnostic markers also have prognostic significance, and PD-L1 immunohistochemistry may predict tumor response to immunotherapy. Application and interpretation of these immnuomarkers should always be guided by clinical history, radiographic findings, and above all histomorphology.
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Affiliation(s)
- David B Chapel
- Department of Pathology, University of Chicago, Chicago, IL 60637, USA.,Department of Pathology, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Jefree J Schulte
- Department of Pathology, University of Chicago, Chicago, IL 60637, USA
| | - Aliya N Husain
- Department of Pathology, University of Chicago, Chicago, IL 60637, USA
| | - Thomas Krausz
- Department of Pathology, University of Chicago, Chicago, IL 60637, USA
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