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Transcript
BAP1 Familial Tumor Predisposition Syndrome
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Inheritance of one non-functional allele
– Germline mutations: 73% truncating, 22% missense (predicted pathogenic)
– Tumor predisposition in 1st and 2nd degree relatives
– Loss/mutation of 2nd allele in cancers
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High penetrance (up to 85%)/early onset (median age of diagnosis = 50) cancer risk
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*Uveal melanoma
Malignant mesothelioma
*Cutaneous melanoma
*Clear cell renal cell carcinoma
*Meningioma
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1972 case report of individual with meningioma, mesothelioma & uveal melanoma
BAP1-deficient pedigree with at least 7 affected family members showing meningioma, uveal
melanoma, mesothelioma, lung cancer and others . Two patients treated for uveal melanoma
developed second malignancy.
– Other cancers with lesser frequency; multiple neoplasms common
– atypical Spitz tumors/nevoid melanoma-like melanoytic proliferations (NEMMPs)
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generally benign
*poor prognosis