2020 Volume 53 Issue 11 Pages 862-870
A 47-year-old woman was admitted to our hospital for further examination of a tumor adjacent to the hepatic caudal lobe. Abdominal CT showed a 43-mm hypovascular tumor. The tumor gave hypointense and hyperintense signals on T1- and T2-weighted images, respectively, in abdominal MRI. There was no sign of tumor invasion. The patient was followed up every six months under a diagnosis of schwannoma. Two and a half years later, the tumor had grown to 56 mm and was compressing the surrounding vessels. After laparoscopic exploration to rule out clear invasion, tumor resection by laparotomy was performed. Intraoperative findings revealed that the tumor had arisen from the nerve plexus around the left hepatic artery. The histopathological diagnosis was schwannoma, with positive staining for S-100 protein. A schwannoma arising from the nerve plexus around the left hepatic artery is very rare.
