Once the APC markers were seen within the cap, the OTSC was deployed to capture all APC markers around the polyp above the OTSC (Fig. 4). Full-thickness resection of the tissue above the OTSC was performed with a needle- knife. Muscle and pericolonic fat were seen at the resection site, which suggested that full-thickness resection had been achieved (Fig. 5). Histopathologic analysis revealed tubular adenoma with negative margins and the presence of muscle fibers and pericolonic fat (Figs. 6 and 7).
展开▼
