Retroperitoneal structural disorders may be caused by trauma, retroperitoneal inflammation, retroperitoneal tumors, abdominal surgery and so on. 1. Trauma: It may be due to car accident injury, fall injury, etc., which leads to the change of the position of retroperitoneal tissues and organs, and thus the retroperitoneal structural disorder occurs. 2. Retroperitoneal inflammation: it is mostly due to the inflammatory infection of neighboring organs, which involves the retroperitoneal tissues and produces local exudate, and the inflammatory mediators may stimulate the tissues to undergo fibrosis, thus resulting in retroperitoneal structural disorders. 3. Retroperitoneal tumor: neurogenic tumor, liposarcoma, adrenal tumor and other tumor tissues may appear in the retroperitoneum, and the excessive growth of tumor tissues will compress the retroperitoneal tissues, thus causing retroperitoneal structural disorder. 4. Abdominal surgery: If there is abdominal surgery, retroperitoneal structural disorder may also occur, especially in retroperitoneal surgical treatment. Such as pancreatic tumor resection, retroperitoneal tumor resection. Patients with retroperitoneal structural disorders should go to the hospital for examination in time, to clarify the cause of the disease, and be actively treated under the guidance of the doctor, so as to avoid delaying the condition and causing adverse consequences.