Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland
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Circumferential margin involvement (CMI) is an important prognostic indicator for patients with rectal cancer. This meta-analysis aims at evaluating the diagnostic precision of magnetic resonance imaging (MRI) for the preoperative evaluation of CMI in patients with rectal cancer. ⋯ Magnetic resonance imaging can accurately predict CMI preoperatively for rectal cancer in single units and this is reproducible across different centres. This strategy has important implications for selection of patients for adjuvant therapy prior to surgery.