Abstract: Cervical endometriosis is a special type of endometriosis associated with active vaginal bleeding, which has been reported in many cases at home and abroad. In this case, a 40-year-old nulliparous woman, G3P0, visited to emergency room with massive vaginal hemorrhage on the second day after menstruation. The volume of vaginal hemorrhage is 4 to 5 times of normal menstruation. Ultrasound revealed dilatation of the cervix. The bleeding stopped after treatment with oxytocin. After bilateral uterine artery embolization in hospital, the hysteroscopy revealed a large amount of old blood in the diverticulum-like cystic space at 8 o′clock in the cervical canal. Then, hysterscopic resection and electrocoagulation of the cystic space were performed. Postoperative pathology revealed a cervical endometriosis cyst. The second hysteroscopy was performed in 2 years later and showed a defect the cavity of the original cervical lesion and scar repair in the wall of the cyst. There was no recurrence in the follow-up so far. This article reviews the literature on the pathogenesis, clinical presentation, diagnosis, and treatment of endometriosis cyst of the cervix, and concludes with lessons learned from this case.

Key words: Uterine cervical diseases, Endometriosis, Hemorrhage, Case reports