Abstract:Most colorectal cancers (CRC) arise from precursor lesions. We aimed to characterize the mutation profile of CRC precursor lesions in a Brazilian population. In total, 90 FFPE lesions, including 67 adenomas, 7 sessile serrated lesions, and 16 hyperplastic polyps, were analyzed by next-generation sequencing. The genetic ancestry of the patients was estimated. Somatic driver mutations were identified in 66.7% of cases, including alterations in APC (32.2%), TP53 (20.0%), KRAS (18.9%), BRAF (13.3%) and EGFR (7.8%)… Show more
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