[A case of polypoid type ganglioneuroma of the decsending colon].

A 32-year-old woman came to our hospital with purpose of careful examination for anemia. Colonoscopy was revealed a solitary protrusion with irregular shape covered with red and discolored mucosa of the descending colon. Surface of this lesion was smooth, which had flexibility in dynamic study with infusion of the air and water. Additionally, multiple ulcer scars was recognized on this lesion. After dye-spraying using by crystal-violet, no neoplastic pits was detected on the lesion except for asteroidal pits and pattern of pinecone on reddish protrusions. Endoscopic ultrasonography demonstrated a thickened low echoic layer (from 2nd to upper half of the 3rd layer) and anechoic structure in higher reddish part of the lesion. Diagnostic EMR was performed with no complication. Histological examination was revealed a spindle cells and ganglion cells in much fiber which was positive for immunostaining of S-100 ptotein. Hyperplastic glands were seen with no neoplastic change in reddish protrusion. Therefore, Diagnosis of polypoid ganglioneuroma of the descending colon was made. To a rare thing, our case was the 16th reported case of ganglioneuroma in large intestine without neurofibroma-1 or multiple endocrine neoplasm.