In addition to causing menstrual pain, endometriosis may also cause kidney pathology? If the ectopic endometrial lesion grows on the ureter, it may cause ureteral obstruction, which may lead to hydronephrosis. However, this is often changing quietly and the patient does not feel it at all. Therefore, we urge that all patients with severe endometriosis should always undergo routine renal ultrasound to be alert to the impairment of kidney function. Is the treatment of endometriosis very troublesome? To date, endometriosis is a very troublesome disease. It is now believed that there are three types of endometriosis: peritoneal, ovarian chocolate cysts and deep infiltrative endometriosis (DIE). Of these, deep infiltrative endometriosis can be very complicated to manage when it involves the intestinal or urinary tract. Because many physicians lack surgical skills in this area, they often do not treat it, or they only treat one part without comprehensive treatment. For example, gynecologists only deal with chocolate cysts, urologists only remove the diseased part of the ureter, and general surgeons only remove the intestinal lesion, often not in a holistic way of thinking. As a result, many patients are still in great pain after surgery and do not have a complete solution to the problem. Is surgery for endometriosis very difficult? Certain endometriosis is more difficult to operate on than endometrial and cervical cancers. Early stage endometrial and cervical cancers tend not to cause changes to the pelvic structures and most lesions are confined to the uterus. The anatomy of the pelvic cavity is largely unaltered, so surgery is relatively easy. Unlike endometriosis, which is not cancer, the ectopic endometrium grows mainly in different locations in the pelvis, resulting in alteration of the pelvic anatomy. At the same time, infiltration of the lesions can lead to sclerosis and adhesion of the tissues. The large variation in anatomical structure can lead to inaccessibility to some less experienced surgeons and the risk of surgery increases. Therefore, for more complex endometriosis, many hospitals do not perform surgery in this area. Does complex endometriosis require multidisciplinary cooperation? In complex endometriosis, in addition to the difficulty of the surgery, multidisciplinary cooperation is necessary to completely resolve the patient’s problem in one surgery if possible. When the lesion is in the intestine, a general surgeon is needed to assist in surgically removing the lesion and repairing the intestine; when the lesion is in the ureter or bladder, a urologist is needed to surgically manage the ureter and bladder; and the initial assessment of the patient’s condition, deciding on the scope of surgery, and dealing with the lesion in the pelvis requires overall planning by a gynecologist. Therefore, we set up a multidisciplinary team with gynecology as the main department and gastrointestinal surgery and urology as the joint participants to cooperate. A single operation tries to solve the patient’s problem as completely as possible, instead of making the patient repeat the operation.