ArticleAnnals of gastroenterological surgery2026
Short Distal Resection Margin Does Not Increase Recurrence Risk After R0 Resection for Rectal Neuroendocrine Tumors: A Single-Institution Retrospective Study of 208 Patients.
Article in Annals of gastroenterological surgery, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Aim: The optimal distal resection margin (DRM) for rectal neuroendocrine tumors (NETs) remains unclear. Although rectal NETs are generally considered indolent, aggressive resection may compromise anorectal function. This study aimed to investigate whether shorter DRM affects recurrence risk in patients with rectal NETs undergoing curative resection. Methods: This retrospective study included 208 patients with rectal NETs who underwent total mesorectal excision (TME) at a single institution between January 2005 and December 2023. The patients were categorized into two groups based on DRM length: shorter DRM (SDRM) (≤ 10 mm) and longer DRM (LDRM) (> 10 mm). Clinicopathological characteristics, recurrence patterns, and survival outcomes were compared between the groups. A fine-grey regression model was used to identify independent predictors of recurrence. Results: Among the 208 patients, 91 (43.8%) had a short DRM. There was no significant difference in the overall recurrence rate between the SDRM and LDRM groups (6.6% vs. 6.0%, Conclusions: In rectal NETs, SDRM may not increase the risk of recurrence when R0 resection is achieved. While oncological radicality should remain the highest priority, minimizing DRM may be oncologically safe and could support more function-preserving surgery, particularly for rectal NET G1/G2.
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