Abstract
Familial adenomatous polyposis (FAP) is a cancer predisposition syndrome driven by germline loss-of-function of the APC gene and phenotypically manifests with intestinal polyposis and a variety of extra-intestinal bone and soft tissue tumors. Craniopharyngioma is not a well-described FAP-associated tumor, however, six cases have been reported in adults, all demonstrating ectopic location and adamantinomatous histology. We report the first case of craniopharyngioma associated with FAP in a pediatric patient. A seven-year-old girl who presented with headache and vomiting was found on magnetic resonance imaging to have a suprasellar mass with cystic extension to the pre-pontine space. The tumor represented an adamantinomatous craniopharyngioma (aCP) with nuclear β-catenin expression. Whole exome sequencing confirmed a CTNNB1 activating point mutation and a germline APC frameshift variant. This case represents the first FAP-associated craniopharyngioma in childhood…. expanding our understanding of the molecular underpinnings driving tumorigenesis in this unique patient.
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support for this study included a National Institutes of Health (NIH) Clinical Sequencing Exploratory Research (CSER) Award (1UM1HG006508).
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Dahl, N.A., Pratt, D., Camelo-Piragua, S. et al. Pediatric craniopharyngioma in association with familial adenomatous polyposis. Familial Cancer 18, 327–330 (2019). https://doi.org/10.1007/s10689-019-00126-8
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DOI: https://doi.org/10.1007/s10689-019-00126-8