Intraoperative identification of colonic tumor site using near infrared indocyanine green-induced endosopic fluorescence imaging system

Interventions: 0.5 ml ICG was injected the mucosa into the submucosal space of the bowel wall at just the distal side of the tumor preoperative endoscopically. We identified the colonic tumor site in the PINPOINT Endoscopic Fluorescence Imaging System, in which NIR fluorescence is superimposed in pseudo-color (green) on a white light image.
Primary outcome(s): The intraoperative visibility rate of tumor site
Study Design: Single arm Non-randomized