MRC1 and colorectal carcinoma: Categorizing CRC by mutational profiling, late-onset CRC revealed a significantly higher rate of dMMR/BRAF+APC- (18% vs. 2.0%), dMMR/BRAF-APC- (8.3% vs. 1.2%) and MMR proficient (pMMR)/BRAF+APC- (12% vs. 4.0%) as compared to traditional-onset CRC.