Role of narrow band imaging in endoscopic submucosal dissection

Figure 12 A case of small flat-type differentiated early-stage gastric cancer with an unclear boundary. A: A small flat-type differentiated early-stage gastric cancer of about 6 mm with an unclear boundary was present in the small curvature of the lower body of the stomach (arrows), but visualization of the lesion by conventional observation was difficult; B: Findings on narrow band imaging-combined magnifying observation: The border between the tumor and non-tumorous region was clearly observed, and apparently abnormal blood vessels were present inside the demarcation line (arrows).