SOLITARY JUVENILE POLYP OF THE DUODENUM WHICH HAS ADENOMATOUS COMPONENT WITH SEVERE DYSPLASIA : REPORT OF A CASE

Abstract

Solitary juvenile polyp has long been regarded as benign lesion without malignant potential. The case herein reported concerns an elderly male with a duodenal solitary juvenile polyp containing foci of adenomatous epithelium. Such a case is extremely rare, so the case is worth reporting. A 77-year-old male visited the out-patient clinic of our hospital with further examination of anemia. Upper GI radiography showed a pedunculated polyp, 2.5×1.5 cm in size, in the 3rd portion of duodenum. Endoscopic findings showed the pedunculated polyp with smooth surface easy to bleed. The polyp was endoscopically excised and examined histopathologically. Histologic features of this solitary juvenile polyp showed mucus-filled cystic spaces with increased mucosal stroma branching of glands and numerous capillaries. In addition, adenomatous component with partial severe dysplasia was seen.