Abstract
A 33-year-old woman was referred to our hospital for further examination of two retroperitoneal tumors that were found incidentally on abdominal USG. CT and MRI 1ed to the diagnosis of intrapelvic retroperitoneal tumors. Surgical resection was planned. We started the operation by the laparoscopic approach. There were two tumors that were adherent to the hypogastric nerves of either side, which 1ed us to suspect that the tumors originated from nerve tissue. The tumors were also too tightly adherent to the anterior side of the sacrum to allow easy separation. Therefore, we converted to open surgery and successfully removed the two entirely separate encapsulated tumors without injury. The histopathological diagnosis of both the tumors was schwannoma. Occurrence of multiple schwannomas in the same patient is extremely rare and worthy of reporting.
