fig2

Figure 2. Submucosal dissection using IT knife nano®. (A) The edge of submucosal tissue is recognized using the ST hood short type®. (B, C) The blade of the IT knife nano approaches to the submucosal tissue. Then moving along the muscle layer (blue arrows), submucosal dissection is performed safely. (A, D, E) The procedure is performed turn by turn in both sides (yellow arrows).