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Radiologic images of a 65-year-old patient with left-sided L4 radiculopathy. A, MR image shows left-sided extraforaminal disk herniation at the L4-5 area (arrow). B and C, Axial source images of CT angiography and 3D-CT show that the left L4 segmental artery passes close to a herniated disk particle and the intervertebral foramen (arrows).
