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- W2956286257 abstract "Abstract Purpose: Recent sequencing studies revealed that a subset of colorectal cancer harbors a significantly higher number of somatic mutations. These hypermutated tumors show distinct clinicopathologic features. However, the prognostic impact of the hypermutated tumors is not clearly established. Experimental Design: We analyzed tumor mutation burden (TMB) from targeted next-generation sequencing data of 40 major genes in 516 patients with colorectal cancer. TMB was defined as total number of nonsynonymous mutations per tumor. Cutoff value for TMB-high was chosen by which best discriminated relapse-free survival (RFS) using the Contal and O'Quigley method. Results: In the TCGA data, mutation count of the selected 40 genes reflected the whole exome mutation burden (Pearson correlation = 0.873, P < 0.001). In our patient cohort, 8 or more mutations in the 40 genes was defined as TMB-high, which best discriminated RFS. A total of 55 patients (10.7%) had TMB-high. TMB-high tumors were more frequently found in a proximal location (63.6%) and had a higher proportion of N0 disease (30.9%) and MSI-H (49.1%) compared with TMB-low. Most importantly, TMB-high was associated with better 5-year RFS compared with TMB-low (96.3% vs. 79.8%, P = 0.005). Although there was significant overlap between TMB-high and MSI-H, MSI-H status was not significantly associated with RFS. Multivariate analysis revealed TMB-high as an independent positive prognostic factor for RFS [adjusted HR, 0.16 (95% confidence interval, 0.04–0.66), P = 0.011]. Conclusions: TMB-high is associated with better prognosis in patients with colorectal cancer treated with curative surgery followed by adjuvant fluoropyrimidine and oxaliplatin chemotherapy." @default.
- W2956286257 created "2019-07-23" @default.
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- W2956286257 date "2019-10-15" @default.
- W2956286257 modified "2023-10-11" @default.
- W2956286257 title "Tumor Mutation Burden and Prognosis in Patients with Colorectal Cancer Treated with Adjuvant Fluoropyrimidine and Oxaliplatin" @default.
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- W2956286257 doi "https://doi.org/10.1158/1078-0432.ccr-19-1105" @default.
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