KRAS and neoplasm: Tumor stage, circumferential resection margin involvement, obstruction/perforation, rupture during surgery, vascular and perineural invasion, poor differentiation, high-frequency microsatellite instability, mismatch repair deficiency, thymidylate synthase positivity, circulating tumor cells, KRAS mutation, BRAF mutation, and elevated expression of Snail or serpinA1 have been suggested to be prognostic for CRC [2–5].