A laterally-spreading tumor in a colonic interposition treated by endoscopic submucosal dissection

Figure 1 A laterally-spreading tumor of granular type (LST-G) in the colonic interposition was shown at colonoscopy. Narrow-band imaging with magnification revealed a capillary pattern type II. Magnifying chromoendoscopy using 0.4% indigo carmine revealed a type IV pit pattern. A: Conventional view; B: Narrow-band imaging with magnification; C: Chromoendoscopy with 0.4% indigo carmine; D: Magnifying chromoendoscopy using 0.4% indigo carmine dye spraying.

Figure 2 Histologically, the resected specimen showed an intramucosal adenocarcinoma in a tubular adenoma. Cross sectional view (HE, magnification × 5).