CTNNB1 and endometrioid adenocarcinoma: Thus, in the study by McConechy et al., most tumors had a molecular profile similar to endometrial serous carcinoma (characterized by the presence of TP53, FBXW7, and PPP2R1A mutations and the absence of ARID1A, CTNNB1, KRAS, or PTEN mutations), while part of the tumors displayed an endometrioid carcinoma-like mutation profile characterized by the presence of ARID1A, CTNNB1, KRAS, and PTEN mutations.