A CASE OF RETROPERITONEAL PARAGANGLIOMA MIMICKING GASTRIC SUBMUCOSAL TUMOR

Abstract

A 76-year-old male visited our hospital for close examination because of abnormal radiological findings pointed out by a mass screening for gastric diseases. An upper GI series and endoscopy revealed a hemispherical elevation indicating a submucosal tumor or extragastric compression. CT scan showed a low density mass retroperitoneally. At surgery, a capsulated retroperitoneal tumor of 3.0 × 3.0 × 2.5 cm in size and 15.5 g in weight was completely removed. Histologic examination revealed a paraganglioma with argyrophil granules. Retroperitoneal paraganglioma was reported only 19 cases in Japan and this was the most smallest case.