Abstract: Chronic endometritis was often overlooked because of its nonspecific symptoms. However, it has drawn more and more attention recently because of its influence on female reproductive prognosis, and abnormal uterine bleeding. Clinical features of chronic endometritis under hysteroscopy were as follows: ①focal or diffuse periglandular hyperemia; ②endometrial stromal edema, increased thickness of the endometrium, with whitish color and irregular surface, and out of phase; ③pedunculated micropolyps (less that 1 mm), stromal edema, or micropolyps with focal or diffuse periglandular hyperemia. The accuracy of hysteroscopic diagnosis of chronic endometritis is affected by the media and doctor′s experience. There is a great difference between the hysteroscopic diagnosis and the pathological diagnosis. The value of hysteroscopy in the evaluation of chronic endometritis has been recognized, but it is still controversial whether hysteroscopy can be used as an independent diagnostic criteria for chronic endometritis. The histopathological diagnosis should be advised if chronic endometritis is clinically suspected under hysteroscopy, so as to reduce the influence of the persistent chronic endometritis on female reproductive prognosis.

Key words: Endometritis, Hyperemia, Polyps, Edema, Chronic endometritis, Endometrial hyperemia, Endometrial micropolyps, Endometrial stromal edema, Hysteroscopes, Diagnosis