Figure 1.

A, Nongranular laterally spreading tumor (NG-LST). Yellow arrow designates the very flat central portion of the NG-LST, which often resists snaring. Blue arrows indicate the short cap projecting from the colonoscope tip. B, The short cap. C, The short projection of the cap from the colonoscope tip prevents suctioning of the muscularis propria into the cap. D, A flexible snare has the advantage of opening and closing smoothly, making it easier for the technician to feel the tissue when grasped. The small size of the snare prevents excessive tissue from being grasped during closure. E, The proximal edge of the LST is injected with hetastarch and indigo carmine. F, The small, flexible snare is placed over the flat portion of the LST, and the tissue is approached very closely with the colonoscope tip. G, The endoscopic image is blinded by the tissue suctioned into the cap. H, Snared tissue after release of suction, before transection with electrocautery. I, Complete resection of the very flat LST after the margin has been cauterized with snare tip on soft coagulation.