Comprehensive Study of the Clinical Phenotype of Germline BAP1 Variant-Carrying Families Worldwide

Sebastian Walpole, Antonia L Pritchard, Colleen M Cebulla, Robert Pilarski, Meredith Stautberg, Frederick H Davidorf, Arnaud de la Fouchardière, Odile Cabaret, Lisa Golmard, Dominique Stoppa-Lyonnet, Erin Garfield, Ching-Ni Njauw, Mitchell Cheung, Joni A Turunen, Pauliina Repo, Reetta-Stiina Järvinen, Remco van Doorn, Martine J Jager, Gregorius P M Luyten, Marina MarinkovicCindy Chau, Miriam Potrony, Veronica Höiom, Hildur Helgadottir, Lorenza Pastorino, William Bruno, Virginia Andreotti, Bruna Dalmasso, Giulia Ciccarese, Paola Queirolo, Luca Mastracci, Karin Wadt, Jens Folke Kiilgaard, Michael R Speicher, Natasha van Poppelen, Emine Kilic, Rana'a T Al-Jamal, Irma Dianzani, Marta Betti, Carsten Bergmann, Sandro Santagata, Sonika Dahiya, Saleem Taibjee, Jo Burke, Nicola Poplawski, Sally J O'Shea, Julia Newton-Bishop, Julian Adlard, David J Adams, Anne-Marie Lane, Ivana Kim, Sonja Klebe, Hilary Racher, J William Harbour, Michael L Nickerson, Rajmohan Murali, Jane M Palmer, Madeleine Howlie, Judith Symmons, Hayley Hamilton, Sunil Warrier, William Glasson, Peter Johansson, Carla Daniela Robles-Espinoza, Raul Ossio, Annelies de Klein, Susana Puig, Paola Ghiorzo, Maartje Nielsen, Tero T Kivelä, Hensin Tsao, Joseph R Testa, Pedram Gerami, Marc-Henri Stern, Brigitte Bressac-de Paillerets, Mohamed H Abdel-Rahman, Nicholas K Hayward

67 Citations (Scopus)

Abstract

Background: The BRCA1-associated protein-1 (BAP1) tumor predisposition syndrome (BAP1-TPDS) is a hereditary tumor syndrome caused by germline pathogenic variants in BAP1 encoding a tumor suppressor associated with uveal melanoma, mesothelioma, cutaneous melanoma, renal cell carcinoma, and cutaneous BAP1-inactivated melanocytic tumors. However, the full spectrum of tumors associated with the syndrome is yet to be determined. Improved understanding of the BAP1-TPDS is crucial for appropriate clinical management of BAP1 germline variant carriers and their families, including genetic counseling and surveillance for new tumors. Methods: We collated germline variant status, tumor diagnoses, and information on BAP1 immunohistochemistry or loss of somatic heterozygosity on 106 published and 75 unpublished BAP1 germline variant-positive families worldwide to better characterize the genotypes and phenotypes associated with the BAP1-TPDS. Tumor spectrum and ages of onset were compared between missense and null variants. All statistical tests were two-sided. Results: The 181 families carried 140 unique BAP1 germline variants. The collated data confirmed the core tumor spectrum associated with the BAP1-TPDS and showed that some families carrying missense variants can exhibit this phenotype. A variety of noncore BAP1-TPDS -associated tumors were found in families of variant carriers. Median ages of onset of core tumor types were lower in null than missense variant carriers for all tumors combined (P < .001), mesothelioma (P < .001), cutaneous melanoma (P < .001), and nonmelanoma skin cancer (P < .001). Conclusions: This analysis substantially increases the number of pathogenic BAP1 germline variants and refines the phenotype. It highlights the need for a curated registry of germline variant carriers for proper assessment of the clinical phenotype of the BAP1-TPDS and pathogenicity of new variants, thus guiding management of patients and informing areas requiring further research.

Original languageEnglish
JournalJournal of the National Cancer Institute
Volume110
Issue number12
Pages (from-to)1328-1341
ISSN0027-8874
DOIs
Publication statusPublished - 1 Dec 2018

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