Fig. 3

Schema of the procedure. a, The transparent hood (Elastic Touch, slit and hole type, M (long), Top company, Tokyo Japan) instead of the laryngoscope is used to create a working space by pushing the larynx; b, A haemoclip is placed on the submucosal tissue directly beneath the flap and maintains a clear submucosal dissection plane during endoscopic submucosal dissection