KRAS and colorectal carcinoma: CRC patients were classified into eight mutually exclusive mutational subgroups, based on the presence of somatic mutations in RAS (KRAS, NRAS, HRAS), BRAF, PIK3CA, MET, as well as, patients' mismatch repair (MMR) status: (1) All‐wild‐type + pMMR, (2) KRASmut + pMMR, (3) KRASmut + PIK3CAmut + pMMR, (4) PIK3CAmut + pMMR, (5) BRAFmut + pMMR, (6) BRAFmut + dMMR, (7) other + pMMR, and (8) other + dMMR.