Transanal intersphincteric approach combined with Kangfuxin enema for treating anastomotic leakage after low anterior resection: Three case reports

Figure 2 Case 1. A: Computed tomography scan revealed contrast medium spill outside the rectum; B: Colonoscopy revealed a pin-hole fistula in the left-posterior rectal wall, indicating the formation of an anastomotic leak; C: After transanal opening of the intersphincteric space, re-examination through colonoscopy displayed intact anastomosis with a local scar without obvious mucosal depression or defect. Circle: Area of contrast medium extravasation; arrows: Opening site of the anastomotic fistula.