子宫内膜异位是指子宫外位的功能性子宫内膜组织，多位于盆腔内，如卵巢、子宫韧带、直肠阴道隔和腹膜等，位于盆腔以外的更为少见，文献上已报道子宫内膜异位发生在膀肚、小肠、阑尾、手术疤痕、疝囊、肺、肾和肢体等，既使有症状，诊断不易，常误诊为缝线肉芽肿、神经瘤、淋巴结病、脓肿、疝、 Endometriosis refers to the functional uterine endometrial tissue, and more located in the pelvic cavity, such as the ovary, uterine ligament, rectovaginal septum and peritoneum, located outside the pelvic more rare, the literature has been reported intrauterine Membrane ectopic occurred in the bladder, small intestine, appendix, surgical scar, hernia sac, lung, kidney and limbs, even if there are symptoms, diagnosis is not easy, often misdiagnosed as suture granuloma, neuroma, lymphadenopathy, abscess, hernia ,