Endoscopic submucosal dissection for early gastrointestinal malignancies: Current state and future perspectives

Figure 1 Steps of endoscopic submucosal dissection. A: Endoscopic view of a rectal sessile polypoidal lesion; B: Narrow band imaging showing a Japanese Narrow Band Imaging Expert Team type 2B lesion; C: Marking around the lesion with a dual-knife; D: Submucosal injection with methylene blue; E: Submucosal dissection with a dual-knife; F: Base of the lesion after resection and one clip applied over a visible vessel to achieve hemostasis.