MINIMAL DEVIATION ENDOMETRIOID CARCINOMA WITH ONCOCYTIC CHANGE OF THEENDOMETRIUM

We report an unusual adenocarcinoma of the endometrium in an 80-year-o ld woman. The tumor diffusely involved the entire thickness of the myo metrium. The cervix, ovaries, and fallopian tubes were unremarkable. M icroscopic examination revealed an extremely well-differentiated endom etrioid adenocarcinoma with mild cytologic atypia and slightly distort ed glands infiltrating almost the entire thickness of the myometrium. In addition, the neoplastic endometrioid cells showed extensive oncocy tic change. Endometrial curettings had been interpreted as simple endo metrial hyperplasia with eosinophilic metaplasia. The significance of this lesion is discussed in terms of possible confusion with benign en dometrial lesions as well as benign cervical lesions.