The paper presents a study consisting of 87 cases of endometrial hyperplasias. Histopathologic examination allowed us to identify the singular glandulo-cystic and adenomatous hyperplasia and the coexistence of the two lesions, but also the association (for two cases) of chronic adenomatous hyperplasia to endometrial carcinoma. These aspects plead for considering hyperplasia as a precancerous lesion taking into account the physiological stage when it appears.