A Circumferential Resection Margin of 1 mm Is a Negative Prognostic Factor in Rectal Cancer Patients With and Without Neoadjuvant Chemoradiotherapy

Abstract

A circumferential resection margin of ≤1 mm had a strong association with disease-free survival compared with circumferential resection margins ≤0.5, ≤2.0, and ≤3 mm. A circumferential resection margin ≤1 mm was an independent predictor of a poor outcome in both the nonchemoradiotherapy and chemoradiotherapy groups.