The most common applications for chromoendoscopy are the following: identification of squamous cell carcinomas or dysplasia of the esophagus, identification of Barrett's esophagus and dysplasia, identification of early gastric cancer, characterization of colonic polyps and colorectal cancer, and in screening for dysplasia in individuals with ulcerative colitis [REF].
The dyes used for chromoendoscopy are typically considered to be safe.