Abstract
Endoscopic colorectal polypectomies were performed for multiple polyp of colon in the 59 years old male. However, pneumoretroperitoneum occurred after multiple clippings for hemostasis and defect closure after EMR of Isp type polyp near the SD junction. It is considered that muscle layer was injured by clipping procedure. Therefore, careful procedure should be requied in clipping. Fortunately, post EMR mucosal defect was finally closed and recovered by conservative therapies in this case.
