AbstractThe clinical stage assigned to simultaneously presenting carcinomas of the uterine corpus and ovary remains variable, depending on which of the two sites is considered to be the primary. Simultaneous involvement may occasionally represent independent primaries, a fact often overlooked. A review of all cases with a tissue diagnosis of carcinoma involving uterus and ovary was undertaken to identify those cases which possibly represent independent primaries. Seventeen such cases were identified on the basis of pathologic features, 15 of which revealed endometrioid type carcinoma at both sites. These 15 patients, who constitute the study group, were treated surgically with or without adjuvant therapy. Thirteen patients have been followed up for 1 to 12 years. Twelve patients are alive and free of disease. Vaginal vault recurrence occurred in a single patient. This was treated successfully. One patient died of an unrelated cause. The good survival fortifies the pathological impression that these cases represent independent primaries.