Figure 3: Schematic of the port sites and the locations of trocars and forceps according to each maneuver. Inferior mesenteric artery dissection. Left colonic mesentery dissection; approaching from the right makes it easier to reach the colon. Pelvic dissection; to avoid collision, the surgeon uses the umbilical port as well as the 12 mm trocar of the stoma-site SILS port. Stapling the distal rectal stump; staples are inserted through the 12 mm trocar in the stoma-site SILS port.