Worm‐like polyp

A 59-years-old woman with the past history of uterine myoma post hysterectomy presented complaint lower abdominal pain for 3 months. The was vague and intermittent no aggravating or alleviating factors. scale about out 10. She denied neither bloody stools nor changes in bowel habits. Physical examination unremarkable. Subsequent colonoscopy showed an elongated “worm-like” polyp overlying normal looking mucosa under white light at transverse colon (Figure 1) a diverticulum ascending coincidentally. size 11 mm length. cold-snare polypectomy then performed immediate complications. What is your diagnosis? histology (H&E stain) but dilated vascular lymphatic structures submucosal layer 2). Based on above findings, diagnosis colonic muco-submucosal (CMSEP) made. This new entity first proposed by Matake et al1 1998 so far literatures, CMSEP has reported malignant potential. Differential includes lipoma, lymphangioma, pedunculated leiomyoma. often detected incidentally significant clinical symptoms signs. However, it been identified to be coincidence inflammatory disease, diverticular colorectal adenoma, adenocarcinoma some patients.2, Endoscopic resection usually during colonoscopy. Mechanism appearance remains unclear believed related mechanical traction from intestinal motion. authors declare conflict interest. Yoen Young Chuah Wei-Chih Sun reviewed patient wrote draft manuscript. Yeong Yeh Lee gave critical revision final version submitted