Infantile fibrosarcoma with TPM3-NTRK1 fusion in a boy with Bloom Syndrome

Susan Huson, Timo Staab, Marta Pereira, Heather Ward, Roberto Paredes, D Gareth Evans, Daniel Baumhoer, James O'Sullivan, Edmund Cheesman, Detlev Schindler, Stefan Meyer

Research output: Contribution to journalArticlepeer-review

Abstract

Bloom syndrome (BS) is a genomic and chromosomal instability disorder with prodigious cancer predisposition caused by pathogenic variants in BLM . We report the clinical and genetic details of a boy who first presented with infantile fibrosarcoma (IFS) at the age of 6 months and subsequently was diagnosed with BS at the age of 9 years. Molecular analysis identified the pathogenic germline BLM sequence variants (c.1642C>T and c.2207_2212delinsTAGATTC). This is the first report of IFS related to BS, for which we show that both BLM alleles are maintained in the tumor and demonstrate a TPM3−NTKR1 fusion transcript in the IFS. Our communication emphasizes the importance of long-term follow up after treatment for pediatric neoplastic conditions, as clues to important genetic entities might manifest later, and the identification of a heritable tumor predisposition often leads to changes in patient surveillance and management.
Original languageEnglish
JournalFamilial Cancer
Publication statusAccepted/In press - 11 Nov 2020

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