Abstract
Our group and others have previously demonstrated the presence of TERT promoter mutations (TERT-mut) in 60–80% of urothelial carcinomas and some of their histologic variants. Five other genes have been frequently implicated in bladder cancer: FGRF3, TP53, PIK3CA, HRAS, and CDKN2A. In the current study, we sought to determine the prevalence of mutations in TERT and these five other genes in de novo papillary urothelial neoplasms of low malignant potential (PUNLMP) of the urinary bladder. A retrospective search of our archives for PUNLMP was performed and 30 de novo cases were identified and included in the study. We found mutations in TERT (TERT-mut) and FGFR3 (FGFR3-mut) to be the most common alterations in the cohort (63 and 60%, respectively). The majority of the TERT-mut-positive tumors (84%) had a g.1295228C > T alteration with the remaining tumors demonstrating g.1295250C > T. Approximately one fourth of tumors had TP53 mutations. These findings support the potential utility of a uniform genetic mutation panel to detect bladder cancers of various subtypes.
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K. K., N. P., and B. V. are founders of Personal Genome Diagnostics and PapGene and advise Sysmex-Inostics. These companies and others have licensed technologies from Johns Hopkins, of which B. V., K. K., and N. P. are inventors and receive royalties. The terms of these arrangements are managed by the university in accordance with its conflict of interest policies.
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This study was supported by grants from the Johns Hopkins Greenberg Bladder Cancer Institute, the Virginia and D.K. Ludwig Fund for Cancer Research, the Commonwealth Fund, the Conrad R. Hilton Foundation, and the Sol Goldman Sequencing Facility at Johns Hopkins.
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Rodriguez Pena, M.D.C., Tregnago, A.C., Eich, ML. et al. Spectrum of genetic mutations in de novo PUNLMP of the urinary bladder. Virchows Arch 471, 761–767 (2017). https://doi.org/10.1007/s00428-017-2164-5
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DOI: https://doi.org/10.1007/s00428-017-2164-5