KRAS and colonic neoplasm: Right-sided colon cancers are more likely to have genome-wide hypermethylation via the CpG island methylator phenotype, hypermutated state via microsatellite instability and carry mutations of the Kirsten rat sarcoma virus gene (KRAS) and the v-Raf murine sarcoma viral oncogene homolog gene (BRAF) [7].