Long Term Follow-Up of Patients With Mesothelioma and Individuals With Germline Mutations in BAP1

Background: -A gene provides instructions to the body. Mutated genes can sometimes cause cancer. Germline mutations are those people are born with. These mutations in the BAP1 gene can cause mesothelioma and other cancers. Researchers want to study people with germline mutations of BAP1 and other genes known to cause cancer. Objective: -To learn how cancer might develop in people with BAP1 mutations. Eligibility: -People ages 2 and older with a germline mutation in BAP1 Design: * Participants will be screened with: * Medical and family history * Saliva test * Participants with mesothelioma will be in the NIH Group. Participants without mesothelioma can choose to be in either the NIH Group or the Remote Group. * Remote Group participants will have a medical and family history by phone. If they have tumor tissue from a previous surgery, it will be tested. They will be contacted once a year by phone. * NIH Group participants will have a baseline visit. This can take up to 4 days. They may have to stay in the area overnight. The visit will include: * Physical exam * Evaluation of tumor tissue if available * Optional tumor biopsy * Blood tests * Scans: A machine will take pictures of the body. * Photographs of skin lesions or other issues * Skin exam * Eye exam * NIH Group participants will have visits once or twice a year. These will include a physical exam, lab tests, scans, and other tests as needed. * Participants who have a confirmed mutation will be asked to contact any relatives who may be at risk and ask them about joining the study.

NCT Number	NCT03830229
Lead Sponsor	National Cancer Institute (NCI)
Conditions	Mesothelioma, Families
Enrollment	1,000 participants
Start Date	2019-03-13
Primary Completion	2032-12-31 (estimated)
Study Completion	2034-12-31 (estimated)
Updated on ClinicalTrials.gov	2026-08-11