Two giant connected retroperitoneal schwannomas: A rare case report

Background: ： There are few reports of large retroperitoneal schwannomas and few guidelines for the diagnosis and surgical treatment. Case presentation： A 40-year-old female came to our department due to abdominal pain for 1 day and there are no other specific symptoms. There were no abnormalities in the patient's tumor markers. Plain computer tomography (CT) scan of the whole abdomen revealed two mass soft tissue density shadows behind the peritoneum, with uneven internal density, cystic low-density shadows and patchy calcification shadows. The larger mass was about 12.0 cm × 12.3 cm in size. Then tumors were completely excised by a reasonable surgical approach while the surrounding organs closely related to the tumor were preserved. Postoperative pathology confirmed that the tumor was benign schwannoma. In the 18-month follow-up, the patient had no recurrences and was asymptomatic. Conclusion: ： We summarize the diagnosis and treatment of a rare giant retroperitoneal schwannoma. Laparotomy for the management of retroperitoneal giant schwannomas may be a safe and effective method.