In addition to ubiquitous PLAC1 expression in the tumor panel, of the seven endometrial cancer cell lines examined here, only the five cell lines derived from endometrioid adenocarcinomas, Ishikawa H, ECC-1, KLE, Hec50co, and AN3CA, evidenced appreciable PLAC1 expression. The gene discussed is PLAC1; the disease is endometrial cancer.