Long-term oncological outcome of segmental versus extended colectomy for colorectal cancer in Crohn’s disease: results from an international multicentre study.

Alessandro Fichera, M.D.
Sensi, B., Khan, J., Warusavitarne, J., Nardi, A., Spinelli, A., Zaghiyan, K., Panis, Y., Sampietro, G., Fichera, A., Garcia-Granero, E., Espin-Basany, E., Konishi, T., Siragusa, L., Stefan, S., Bellato, V., Carvello, M., Adams, E., Frontali, A., Artigue, M., Frasson, M., Marti-Gallostra, M., Pellino, G. and Sica, G.S. (2021). “Long-term oncological outcome of segmental versus extended colectomy for colorectal cancer in Crohn’s disease: results from an international multicentre study.” J Crohns Colitis Dec 13;jjab215. [Epub ahead of print].
BACKGROUND AND AIMS: Crohn’s Disease increases colorectal cancer risk, with high prevalence of synchronous and metachronous cancers. Current guidelines for colorectal cancer in Crohn’s Disease recommend pan-proctocolectomy. Aim of this study was to evaluate oncologic outcomes of a less invasive surgical approach. METHODS: Retrospective database analysis of Crohn’s disease patients with colorectal cancer undergoing surgery at selected European and U.S. tertiary centres. Outcomes of segmental colectomy were compared with those of extended colectomy: total colectomy and pan-proctocolectomy. Primary outcome was progression-free survival. Secondary outcomes included overall survival, synchronous and metachronous colorectal cancer and major postoperative complications. RESULTS: Ninety-nine patients were included: 66 patients underwent segmental colectomy and 33 extended colectomy. Segmental colectomy patients were older (p= 0.0429), had less extensive colitis (p = 0.0002) and no pre-operatively identified synchronous lesions (p = 0.0109).Median follow up was 43 (31-62) months. There was no difference in unadjusted progression-free survival (p = 0.2570) nor in overall survival (p = 0.4191) between segmental and extended colectomy. Multivariate analysis adjusting for age, sex, ASA score and AJCC staging, confirmed no difference for progression-free survival (HR 1.00 p = 0.9993) or overall survival (HR 0.77 p = 0.6654). Synchronous and metachronous cancers incidence was 9% and 1.5% respectively. Perioperative mortality was nil and major complications were comparable (7.58% vs 6.06% p = 0.9998). CONCLUSIONS: Segmental colectomy seems to offer similar long-term outcomes to more extensive surgery. Incidence of synchronous and metachronous cancers appears much lower than previously described. Further prospective studies are warranted to confirm these results.