[Peripheral neuroepithelioma in the retroperitoneum; a case report and a review of the literature].

A 30-year-old man with peripheral neuroepithelioma which was present in the retroperitoneum underwent surgical treatment under the diagnosis of germ cell tumor. Subsequently he died of local recurrence and multiple metastases to the liver seven months after surgery. To our knowledge, this is the second case of peripheral neuroepithelioma which was observed in the retroperitoneal space in the literature of the world. We also reviewed 20 cases of peripheral neuroepithelioma reported in Japan.