Fig. 2.

The typical picture and schema of ring-shaped thread counter traction. A By lifting up the edge of the lesion, it became easier and safer to begin the incision into the submucosal layer. B The schema revealed 10-mm ring thread as inserted into the colon through a channel for clipping both the affected sides of the colon, thereby lifting the lesion. C As submucosal dissection was continued and the traction force of the ring-shaped thread was decreased, a third hemoclip was added to hook and slide one side of the ring-shaped thread to obtain further counter traction. D As this schema reveals, additional counter tractions were repeatedly possible by adding hemoclips hooking and sliding contralateral to the lesion