A Second Assisting Endoscope for the Removal of an Accidentally Unreleased Detachable Snare during Colon Polypectomy

from 0.3% to 6.1%, and is the most common complication of polypectomy.1 The risk of bleeding may be especially high after resecting pedunculated polyps because of the presence of a large artery in the stalk. Bleeding can occur in the immediate postpolypectomy period, or may be delayed up to 29 days.2 Several endoscopic techniques have been developed. In 1989, Hachisu3 developed a detachable snare device that completely stops blood flow in the stalk. While loading the detachable snare, it is important to verify that it is properly attached to the hook wire and smoothly pulled into and then pushed back from the coil sheath without getting stuck.4 A second endoscope-assisted endoscopic submucosal dissection for large colorectal tumors has been reported recently.5-7 Here, we report a case in which an accidently unreleased detachable snare used for colon polypectomy was successfully removed by a second assisting endoscope. A 40-year-old man underwent screening colonoscopy. A grossly 1.5 cm-sized pedunculated polyp with a 3 cm-long stalk was observed at the distal descending colon. A detachable snare (MAJ-254; Olympus, Tokyo, Japan) was placed around the lower one-third of the stalk. The detachable snare could not be released from the hook wire of the operating part, as the loop of nylon thread appeared to be tightly stuck between the coil sheath and hook wire. Hence, the snare loop and coil sheath were attached to the colon polyp, and the coloClin Endosc 2013;46:683-684