Chromoendoscopy is a blue or green dye that is used during colonoscopy to help highlight differences in mucosa, as well as dysplastic and malignant changes that could indicate colorectal cancer risk.
Noticing these subtle differences may be helpful in patients who have healed ulcerative colitis or Crohn’s colitis (it cannot be used with active inflammation) to help find small polyps in these patients that may otherwise be missed.
This is a new, up-and-coming technique that has been found to help identify lesions that may be missed otherwise in patients at high-risk of colon cancer with history of inflammatory bowel disease.