Risk factors for local recurrence and appropriate surveillance interval after endoscopic resection

Figure 3 An 82-year-old woman underwent Endoscopic submucosal dissection for a sessile polyp that measured 20 mm in diameter and was located in the ascending colon. A: The tumor histology was T1b cancer with an indistinct margin; however, the patient refused surgical operation because of her old age; B: After 3 mo, colonoscopy revealed a recurrent lesion and surgery was performed. ESD: Endoscopic submucosal dissection.