Early biologics and neoplasia in UC with backwash ileitis

What is known

• Backwash ileitis is associated with colorectal neoplasia/carcinoma. ^1–3
• PSC-IBD (which features backwash ileitis) is a high-risk group warranting early, intensive colonoscopic surveillance. ⁴

What is unknown / caveats

• No excerpt addresses whether early biologic therapy (anti-TNF or otherwise) changes the subsequent risk of colorectal neoplasia in ulcerative colitis patients with backwash ileitis.
• None of the retrieved sources evaluate a biologic vs. conventional therapy comparison for neoplasia prevention.

References

1. Navaneethan U, Jegadeesan R, Gutierrez NG, Venkatesh PG, Arrossi AV, Bennett AE, Rai T, Remzi FH, Shen B, Kiran RP. Backwash ileitis and the risk of colon neoplasia in ulcerative colitis patients undergoing restorative proctocolectomy. Dig Dis Sci. 2013;58:2019-27. PMID: 23371015.

2. Potack J, Itzkowitz SH. Colorectal cancer in inflammatory bowel disease. Gut Liver. 2008;2:61-73. PMID: 20485613.

3. Heuschen UA, Hinz U, Allemeyer EH, Stern J, Lucas M, Autschbach F, Herfarth C, Heuschen G. Backwash ileitis is strongly associated with colorectal carcinoma in ulcerative colitis. Gastroenterology. 2001;120:841-7. PMID: 11231938.

4. Okada H, Sugimoto S, Kayashima A, Mikami Y, Kanai T, Nakamoto N. Distinct phenotype of primary sclerosing cholangitis-associated inflammatory bowel disease. J Gastroenterol. 2026. PMID: 41857231.

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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.