No other stratification into subgroups based on the molecular features, including classification defined by TCGA for endometrial carcinoma (POLEmut, MSI-High, p53abn, and NSMP), classification based on the presence of ARID1A, PIK3CA, TERT, TP53 or KRAS mutation, and classification based on expression profiling, showed prognostic significance. Here, PIK3CA is linked to endometrial carcinoma.