Background: Apparent diffusion coefficient (ADC) value measured from diffusion-weighted magnetic resonance (MR) images are highly correlated with pathological T or N stage, tumor differentiation grade, and extramural depth of tumor in patients with rectal cancer. Objectives: To assess the prognostic value of diffusion MR imaging and clinical-pathologic risk factors in patients with rectal cancer. Methods: This retrospective study was approved by our institutional review board and written informed consent was waived. Sixty-
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