Hyperplasia and carcinoma of the endometrium.

Published criteria for classifying endometrial hyperplasias and their differential diagnosis from well-differentiated endometrioid-type adenocarcinoma are reviewed, and the author's own interpretations and recommendations are presented. Also discussed are the subjects of misdiagnosis of hyperplasia and carcinoma, premalignant significance of hyperplasia, and prognostic significance of hyperplasia in patients with carcinoma patients.