Endometrial adenocarcinoma coincident with intrauterine pregnancy. A case report.

The simultaneous occurrence of endometrial adenocarcinoma and intrauterine pregnancy is a rare phenomenon. Eight cases have been reported on, including the one discussed below. The presence of two apparently mutually exclusive conditions within a uterus is difficult to explain. The neoplasm may arise in foci of immature basal cells, which do not respond to hormonal stimulation. Although this event is rare, the clinician should be aware of the possibility.