ArticleFamilial cancer2025
Pancreatic adenocarcinoma in a patient with a germline RB1 pathogenic variant.
Article in Familial cancer, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Germline pathogenic variants (GPVs) in RB1 are associated with the pediatric-onset intra-ocular malignancy retinoblastoma and typically present in infancy as multi-focal or bilateral disease. Survivors of retinoblastoma are at high risk for developing subsequent malignant neoplasms (SMNs); indeed, these are the leading cause of death for individuals cured of their retinoblastoma. With the exception of sarcomas, typically occurring at the site of antecedent radiation therapy for the original retinoblastoma diagnosis, and melanoma, little is known of other SMNs in retinoblastoma survivors. Here, we describe a unique case of pancreatic adenocarcinoma (PDAC) in a patient with a RB1 GPV who was diagnosed with retinoblastoma as an infant. At age 57, he was diagnosed with PDAC. Sequence analysis of the PDAC revealed the acquisition of a somatic second-hit in RB1 in the PDAC. Multispectral immunofluorescence analyses of the PDAC tumor illustrated selective loss of the RB protein in the tumor that was accompanied by the continued expression of p16
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