fig1

Figure 1. Endo-knives for endoscopic submucosal dissection (ESD): (A) needle-type knife (Dual Knife J. Olympus, Co., Ltd.); (B) partially insulated-type knife (IT Knife2. Olympus, Co., Ltd.); and (C) scissor-type knife (SB Knife Jr. Sumitomo Bakelite, Co., Ltd.). The image in (C) is used with permission from Sumitomo Bakelite, Co., Ltd.