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Guidelines for pathologic diagnosis of mesothelioma: 2023 update of the consensus statement from the International Mesothelioma Interest Group

Husain, Aliya N., Chapel, David B., Attanoos, Richard, Beasley, Mary Beth, Brcic, Luka, Butnor, Kelly, Chirieac, Lucian R., Churg, Andrew, Dacic, Sanja, Galateau-Salle, Francoise, Hiroshima, Kenzo, Hung, Yin P., Klebe, Sonja, Krausz, Thomas, Khoor, Andras, Litzky, Leslie, Marchevsky, Alberto, Nabeshima, Kazuki, Nicholson, Andrew G., Pavlisko, Elizabeth N., Roden, Anja C., Roggli, Victor, Sauter, Jennifer L., Schulte, Jefree J., Sheaff, Michael, Travis, William D., Tsao, Ming-Sound, Walts, Ann E. and Colby, Thomas V. 2024. Guidelines for pathologic diagnosis of mesothelioma: 2023 update of the consensus statement from the International Mesothelioma Interest Group. Archives of Pathology & Laboratory Medicine 148 (11) , pp. 1251-1271. 10.5858/arpa.2023-0304-ra

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Abstract

Context.— Mesothelioma is an uncommon tumor that can be difficult to diagnose. Objective.— To provide updated, practical guidelines for the pathologic diagnosis of mesothelioma. Data Sources.— Pathologists involved in the International Mesothelioma Interest Group and others with expertise in mesothelioma contributed to this update. Reference material includes peer-reviewed publications and textbooks. Conclusions.— There was consensus opinion regarding guidelines for (1) histomorphologic diagnosis of mesothelial tumors, including distinction of epithelioid, biphasic, and sarcomatoid mesothelioma; recognition of morphologic variants and patterns; and recognition of common morphologic pitfalls; (2) molecular pathogenesis of mesothelioma; (3) application of immunohistochemical markers to establish mesothelial lineage and distinguish mesothelioma from common morphologic differentials; (4) application of ancillary studies to distinguish benign from malignant mesothelial proliferations, including BAP1 and MTAP immunostains; novel immunomarkers such as Merlin and p53; fluorescence in situ hybridization (FISH) for homozygous deletion of CDKN2A; and novel molecular assays; (5) practical recommendations for routine reporting of mesothelioma, including grading epithelioid mesothelioma and other prognostic parameters; (6) diagnosis of mesothelioma in situ; (7) cytologic diagnosis of mesothelioma, including use of immunostains and molecular assays; and (8) features of nonmalignant peritoneal mesothelial lesions.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Medicine
Publisher: College of American Pathologists
ISSN: 0003-9985
Date of First Compliant Deposit: 7 November 2024
Date of Acceptance: 31 January 2024
Last Modified: 09 Dec 2024 16:54
URI: https://orca.cardiff.ac.uk/id/eprint/173721

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