Authors’ contributions
Hiroyuki Kuamata, Keisuke Onishi, and Tetsuro Takayama performed the surgery. Hiroyuki Kumata, Tetsuro Takayama, Kengo Asami, and Izumi Haga managed the perioperative course. Noriyuki Obara was the gastroenterologist who examined and diagnosed the cancer. Hiroyuki Kumata, Keisuke Onishi, Tetsuro Takayama, Kengo Asami, Hirofumi Sugawara, and Izumi Haga participated in discussions. Keisuke Onishi supervised the patient treatment. Keisuke Onishi and Tetsuro Takayama prepared the manuscript. Kengo Asami supervised the writing of the manuscript. All authors have read and approved the final manuscript.