Imaging Review of Benign Colonic and Anorectal Pathologies.

This review highlights the MR imaging appearance of benign colonic and anorectal conditions, emphasizing anatomic landmarks and characteristic imaging patterns. MR imaging enables confident differentiation of benign neoplasms, cystic lesions, and inflammatory processes through excellent soft-tissue contrast, multiplanar capability, and advanced sequences such as diffusion-weighted imaging. As a radiation-free modality with high diagnostic performance, MR imaging plays an increasingly important role in evaluating colorectal pathology, particularly in pregnancy and in patients requiring avoidance of ionizing radiation.