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- W2784355197 abstract "Patients with Lynch syndrome (LS) have a significantly increased risk of developing upper-tract urothelial carcinoma (UTUC). Here, we sought to identify differences in the patterns of mutational changes in LS-associated versus sporadic UTUCs.We performed targeted sequencing of 17 UTUCs from patients with documented LS-associated germline mutations (LS-UTUCs) using the Memorial Sloan Kettering Integrated Molecular Profiling of Actionable Cancer Targets targeted exon capture assay and compared the results with those from a recently characterized cohort of 82 patients with sporadic UTUC.Patients with LS-UTUC were significantly younger, had had less exposure to tobacco, and more often presented with a ureteral primary site compared with patients with sporadic UTUC. The median number of mutations per tumor was significantly greater in LS-UTUC tumors than in tumors from the sporadic cohort (58; interquartile range [IQR], 47-101 v 6; IQR, 4-10; P < .001), as was the MSIsensor score (median, 25.1; IQR, 17.9-31.2 v 0.03; IQR, 0-0.44; P < .001). Differences in the genetic landscape were observed between sporadic and LS-associated tumors. Alterations in KMT2D, CREBBP, or ARID1A or in DNA damage response and repair genes were present at a significantly higher frequency in LS-UTUC. CIC, NOTCH1, NOTCH3, RB1, and CDKN1B alterations were almost exclusive to LS-UTUC. Although FGFR3 mutations were identified in both cohorts, the R248C hotspot mutation was highly enriched in LS-UTUC.LSand sporadic UTUCs have overlapping but distinct genetic signatures. LS-UTUC is associated with hypermutation and a significantly higher prevalence of FGFR3 R248C mutation. Prospective molecular characterization of patients to identify those with LS-UTUC may help guide treatment." @default.
- W2784355197 created "2018-02-02" @default.
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- W2784355197 date "2018-11-01" @default.
- W2784355197 modified "2023-10-14" @default.
- W2784355197 title "Genomic Characterization of Upper-Tract Urothelial Carcinoma in Patients With Lynch Syndrome" @default.
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- W2784355197 doi "https://doi.org/10.1200/po.17.00143" @default.
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