Complete closure of a large defect after EMR of a lateral spreading colorectal tumor when using a two-channel colonoscope.

CASE REPORTA 64-year-old man with a positive fecal occult blood testunderwent colonoscopy, at which a protruded Is + IIa(LST-granular type) lesion, 40 3 40 mm in size, withunevensurfacetexturewasdetectedinthelowerrectum.Itwas slightly elevated and had a reddish surface. Chro-moendoscopy with a high-magnification colonoscope(CF240ZI; Olympus Optical Co., Ltd., Tokyo, Japan) andindigo carmine (0.2%) dye demonstrated the surfacecharacter and margin of the lesion (Fig. 1). Staining withcrystal violet (0.05%) revealed a Kudo type IV pit pattern

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