Rectal HGD in Crohn's colitis: APR or endoscopic resection

What is known

• In Crohn's colitis, HGD on biopsy had a 73% predictive value for a final HGD-or-cancer diagnosis, and multifocal dysplasia was found in 44% undergoing proctocolectomy/subtotal colectomy. ¹
• Consensus/society guidance supports endoscopic resection plus continued surveillance when a dysplastic lesion is completely removable endoscopically, given improved optical technologies and low metachronous cancer risk. ^2,3
• For localized neoplasia not amenable to endoscopic resection, segmental/subtotal resection with endoscopic follow-up has been offered to preserve rectum and function versus total proctocolectomy. ³
• A narrative review argues that because synchronous/metachronous neoplasm rates remain high, total proctocolectomy with end ileostomy may best remove all at-risk tissue despite being a larger operation. ⁴

What is unknown / caveats

• Guidelines favor endoscopic resection + surveillance for resectable lesions, while a review favors total proctocolectomy to clear multifocal at-risk mucosa
• Excerpts do not compare APR specifically vs sphincter-preserving proctectomy, nor APR vs EMR head-to-head
• Evidence is low-quality: retrospective cohorts and narrative reviews, no RCT
• Whether a lesion is endoscopically resectable (visible, discrete, no submucosal fibrosis) is the pivotal variable and is not established from these excerpts for a given patient.

References

1. Kiran RP, Nisar PJ, Goldblum JR, Fazio VW, Remzi FH, Shen B, Lavery IC. Dysplasia associated with Crohn's colitis: segmental colectomy or more extended resection?. Ann Surg. 2012;256(2):221-6. PMID: 22791098.

2. Derks Monica E, Te Groen M, Peters Charlotte P, Dijkstra G, de Vries Annemarie C, Romkens Tessa E, Horjus Carmen S, de Boer Nanne K, Bemelman Willem A, Nagtegaal Iris D, Derikx Lauranne A, Hoentjen F. Endoscopic and surgical treatment outcomes of colitis-associated advanced colorectal neoplasia: a multicenter cohort study. Int J Surg. 2023;109(7):1961-1969. PMID: 37300890.

3. Krugliak Cleveland N, Ollech JE, Colman RJ, Rodriquez D, Hirsch A, Cohen RD, Hanauer SB, Hart J, Hurst R, Rubin DT. Efficacy and Follow-up of Segmental or Subtotal Colectomy in Patients With Colitis-Associated Neoplasia. Clin Gastroenterol Hepatol. 2019;17(1):205-206. PMID: 29751167.

4. Lightner AL. Segmental Resection versus Total Proctocolectomy for Crohn's Colitis: What is the Best Operation in the Setting of Medically Refractory Disease or Dysplasia?. Inflamm Bowel Dis. 2018;24(3):532-538. PMID: 29462390.

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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.