Fig. 2

a–f Endoscopic dilation using rendezvous method. a Observed from oral side via colostomy and anal side, the anastomotic lesion became narrow, and the lumen of anastomosis was difficult to detect. b A radiographic image during rendezvous method. Endoscopes were inserted simultaneously from both the oral side via colostomy and anal side. The length of the stenosis is about 10 mm, and it is bent. c, d An incision was made from the anal side with a needle scalpel while looking at the light source from oral side via colostomy and a fluoroscopic image. However, because it did not open with that, next incision was made from oral side via colostomy and open it. e Dilation was performed from the anal side using 8.5–10.5-mm balloons at 1 atm, 2 atm, and 3 atm for 1 min each. f The stenosis was improved remarkably