PIK3CA and exstrophy-epispadias complex: The frequency of pathological variants in the AT-Rich Interaction Domain 1A (ARID1A), Phosphatase and Tensin Homolog (PTEN), and Phosphatidylinositol-4,5-Bisphosphate 3-Kinase Catalytic Subunit Alpha (PIK3CA) genes in EAOC tumors was found to be high, similar to endometrioid-type endometrial cancer (EEC)9.