Enhanced visualization of vessels in submucosa by amber red color imaging in colonic endoscopic submucosal dissection

Intraoperative bleeding is a major complication of endoscopic submucosal dissection (ESD). Various devices and techniques have been developed to control intraoperative bleeding [1] [2] [3] [4]. Amber red color imaging is a recently developed observation modality that integrates brightness and color-enhancement technology used in linked color imaging, characterized by an increased proportion of long-wavelength relative linked color imaging, which targets the mucosa [5]. These amber red color imaging features improve the visibility of blood vessels and active bleeding points in the deep submucosa. Herein, we present a case of a colonic laterally spreading tumor that was treated with ESD using amber red color imaging ([Video 1]).