Notably, clear cell carcinomas were marked by high prevalence of PI3KCA and ARID1A mutations (67% and 50% for PIK3CA and ARID1A, respectively), compared to HGSC and other EOC types (P = 1.067 × 10−05 and P = 5.43 × 10−04) [40–42]. Here, ARID1A is linked to clear cell adenocarcinoma.