A Case of Protruding Type Mucosal Prolapse Syndrome Successfully Treated by Endoscopic Mucosal Resection

Mucosal prolapse syndrome (MPS) is caused by excessive mechanical stimulus. A conservative approach is used as basic medical treatment of MPS, such as improvement of bowel habits. However, we performed endoscopic mucosal resection (EMR) in the following MPS case. A 16-year-old male underwent colonoscopy and a protruding type MPS was detected. He initially received conservative treatment but he could not follow our medical instructions. Thus, nine months after his presentation, EMR for the MPS was performed. The histological specimen showed fibromuscular obliteration of the lamina propria which is a characteristic pathological change of MPS. After the resection, his symptoms and the endoscopic findings improved. EMR for protruding type MPS is a good option when conservative treatment is not effective.