Mechanism of less frequent hemorrhage after cold polypectomy for colorectal polyps - Mechanism of CSP

All cold resections were limited to the shallow submucosa, while 60% of hot resections advanced to the deep submucosa and 20% to the muscularis propria (p<0.001). There was no significant difference in the width of destruction. In hot resections, the number of remaining large vessels had a trend toward fewer (p=0.15) and the depth of remaining submucosa was less (p=0.007). In deep submucosa, the vessel diameter was larger (p<0.001) and the number of large vessels was greater (p=0.018).