Cold snare polypectomy (CSP) and hot snare polypectomy (HSP) are both widely used; however, it is not clear whether they give different incomplete resection rates for polyps of 4–9mm. In this randomized controlled trial, the incomplete resection rates were found to be similar (CSP 10.7% vs. HSP 7.4%), but noninferiority for CSP compared with the standard HSP was not demonstrated. Differences due to resection technique were small, but serrated and hyperplastic histology were both independent risk factors for incomplete resection.

The safety and efficacy of endoscopic intermuscular dissection (EID), a technique where the dissection plane is extended into the muscularis propria, separating the circular and longitudinal muscle, was examined in this multicenter (2 centers) prospective study of 67 patients. The rate of overall technical success was 96 %, for R0 resection it was 81% (90% for pT1Sm2/3), and for curative resection 45%. Partial full-thickness resection occurred in eight cases, with all being endoscopically closed. Adverse events occurred in 12 %, with no severe adverse events seen.