Serous adenocarcinomas display a 6.6-fold higher PLAC1 expression (P < 0.01) relative to endometrioid adenocarcinomas, and carcinosarcomas display a 16.5-fold higher PLAC1 expression (P < 0.07) relative to endometrioid adenocarcinomas. The gene discussed is PLAC1; the disease is endometrioid adenocarcinoma.