Diagnostic endoscopic submucosal dissection for invasive cancer with the four cardinal points traction strategy.

Diagnostic endoscopic submucosal dissection for invasive cancer with the four cardinal points traction strategy. sion, placement of first clip with the wire with four loops. b Placement of other clips at opposite edges. c Traction obtained by fixing all clips to the opposite mucosal wall, and dissection of the stretched submucosa.