Incomplete Resection Rate of Colorectal Polyps ≤20 mm

Variability in the quality of colorectal polyp resection contributes to the risk for postcolonoscopy colorectal cancer. To better assess the frequency of incomplete polyp resection, investigators conducted a systematic review and meta-analysis of studies reporting the incomplete resection rate (IRR) for polyps ≤20 mm. They included 32 studies with a total of 9300 polyps. IRR was determined by histologic assessment of polypectomy sample, with or without additional biopsy of resection margins, or, in a few studies, visual assessment of resection margins. The main results were as follows:

• The overall IRR for snare polypectomy was 14%. The IRR was significantly lower for polypectomies performed by expert endoscopists (8%) compared with nonexpert…