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Corticospinal tract (CST) fiber tracking in a 37-year-old man with benign meningioma. A 37-year-old man presented with seizure and right-upper-extremity weakness. A T1-enhanced image shows a slightly enhanced mass in the left frontal lobe (A). The posterior limb of the internal capsule is selected as the seed region of interest (ROI) (B and C). The ipsilateral cerebral peduncle is selected as the target ROI (D). The tractography image shows the CST on a coronal T2-weighted image (E).
