KRAS and colonic neoplasm: The literature review revealed that KRAS and BRAF mutations are more common in women and right colon tumors, BRAFnon-V600E mutations are more common in younger patients and left colon tumors, no significant correlation could be established between NRAS mutations and clinical parameters, and there is no significant study to reveal the relationship between KRAS/NRAS and BRAF mutations and age.