Difficult colorectal polypectomy: Technical tips and recent advances

Figure 7 Bleeding during endoscopic submucosal dissection. A: Endoscopic image in white light imaging showing the bleeding from the large vessels of the polyp; B: Identification of bleeding sources during polypectomy is easier in the Red Dichromatic Imaging (RDI) mode. RDI mode also reduces the endoscopists’ psychological stress by turning the blood color yellow.