Complete resection of recurrent anal canal cancer using endoscopic submucosal dissection and transanal resection: A case report

Figure 1 Endoscopic image at initial presentation. A: A 20-mm elevated lesion on the left wall of the anal canal; B: The number represents the cross section, and the tumor is identified by the yellow line. But the specimen was removed in two sections. Therefore, it was difficult to evaluate.

Figure 2 The entire circumference was marked, and endoscopic submucosal dissection and transanal resection were performed. The specimen was resected without damage.

Figure 3 A 20-mm Isp lesion on the left anterior wall of the rectum. The demarcation line is observed circumferentially using narrow band imaging.

Figure 4 The number represents the cross section, and the tumor is identified by the yellow line. The specimen was removed without damage.