Premalignant lesions are becoming of incrementally superior importance for the interest of primary prevention of cancer.This essay considers informing about endometrial hyperplasia with different methodology of diagnosis and different modalities of treatment and follow up. In the field of evaluation and diagnosis, hysteroscopy and transvaginal sonography are the most important. Regarding treatment, hormonal therapy with progestines and LHRH analogues is featuring. Endometrial ablation and hysterectomy represent surgical options of treatment.