Chromoendoscopy and CRC incidence in UC

What is known

• A meta-analysis of 17 RCTs (2,457 patients) found dye-chromoendoscopy superior to standard-definition white-light endoscopy, but no difference versus high-definition white-light endoscopy. ¹
• Studies on chromoendoscopy primarily focus on dysplasia detection; its impact on reducing CRC incidence and mortality remains difficult to quantify. ²
• The 2015 SCENIC consensus recommends chromoendoscopy over standard-definition white-light endoscopy for surveillance in ulcerative colitis. ^3,4
• A large retrospective study reported chromoendoscopy did not increase neoplasia detection versus conventional colonoscopy with random biopsies. ⁵

What is unknown / caveats

• Retrospective study found no increased neoplasia detection with chromoendoscopy ⁵
• Ongoing debate and conflicting data on preferred surveillance modality ⁴
• Endpoints are dysplasia detection, not CRC incidence or mortality
• RCT superiority is only against standard-definition, not high-definition, white light
• No excerpt reports a trial demonstrating that chromoendoscopy directly lowers CRC incidence or mortality compared with standard surveillance.

References

1. Resende RH, Ribeiro IB, de Moura DTH, Galetti F, Rocha RSP, Bernardo WM, Sakai P, de Moura EGH. Surveillance in inflammatory bowel disease: is chromoendoscopy the only way to go? A systematic review and meta-analysis of randomized clinical trials. Endosc Int Open. 2020. PMID: 32355874.

2. Fasulo E, D'Amico F, Zilli A, Furfaro F, Cicerone C, Parigi TL, Peyrin-Biroulet L, Danese S, Allocca M. Advancing Colorectal Cancer Prevention in Inflammatory Bowel Disease (IBD): Challenges and Innovations in Endoscopic Surveillance. Cancers (Basel). 2024. PMID: 39796690.

3. Kisiel JB, Konijeti GG, Piscitello AJ, Chandra T, Goss TF, Ahlquist DA, Farraye FA, Ananthakrishnan AN. Stool DNA Analysis is Cost-Effective for Colorectal Cancer Surveillance in Patients With Ulcerative Colitis. Clin Gastroenterol Hepatol. 2016. PMID: 27464589.

4. Clarke WT, Feuerstein JD. Colorectal cancer surveillance in inflammatory bowel disease: Practice guidelines and recent developments. World J Gastroenterol. 2019. PMID: 31435169.

5. Stidham Ryan W, Higgins Peter DR. Colorectal Cancer in Inflammatory Bowel Disease. Clin Colon Rectal Surg. 2018;31(3):168-178. PMID: 29720903.

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Draft, generated by the IBDology RAG and not yet clinician-reviewed. Answers are grounded in the retrieved literature listed above; a high faithfulness score means the answer matches its sources, not that the sources are correct.