图示子宫内膜囊性增生，大量子宫内膜呈不规则增生，腺体不规则增大，柱状上皮有一定的异型性。单纯性子宫内膜增生可导致出血，但不属癌前病变。但腺瘤性内膜增生可进展为癌。
This is endometrial cystic hyperplasia in which the amount of endometrium is abnormally increased and not cycling as it should. The glands are enlarged and irregular with columnar cells that have some atypia. Simple endometrial hyperplasias can cause bleeding, but are not thought to be premalignant. However, adenomatous hyperplasia is premalignant.