As a significant protein that has shown to be both downstream effector of several signaling pathways such as EGFR (ERBB1), HER2 (ERBB2), HER3 (ERBB3), and ERBB4, and upstream effector of RAF-1/MAPK, PI3K, RalGEFs, Rac/Rho, BRAF, MEK1, ERK, AKT, PLC and PKC, a mutation inRAS thereby causing hyperactivation of proteins could result in dysregulation ultimately leading to cancer initiation and proliferation.KRAS mutation, one of the majorly observed mutation in OC, is a predicted biomarker for poor clinical outcomes and chemoresistance. This evidence concerns the gene PIK3CA and cancer.