White Opaque Substance, a New Optical Marker on Magnifying Endoscopy: Usefulness in Diagnosing Colorectal Epithelial Neoplasms
Background/Aims Vacuum Flasks A white substance that is opaque to endoscopic light is sometimes observed in the epithelium during narrowband imaging with magnifying endoscopy of gastric or colorectal epithelial neoplasms.This prospective observational study aimed to determine whether the morphology of the white opaque substance (WOS) allows differe