MSH6 and endometrioid adenocarcinoma: Notably, OC in all cases with pathogenic germline PMS2 variants in the present study (2/2 cases) and in a previous study (4/4 cases) [7] belonged to the HGSC subtype, whereas OC in some pathogenic germline MSH6 variant cases in the present study (1/2 cases) and a previous study (2/3 cases) [7] was classified as endometrioid carcinoma.