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CSF rhinorrhea in a 39-year-old man after sellar region surgery. A, Coronal thin-section CT scan reveals a defect in the right side of the sphenoid sinus (arrow) and opacification of the right sphenoid sinus. B and C, Coronal and axial T1-weighted fat-saturated MR cisternograms obtained after the intrathecal administration of Gd-DTPA show contrast leakage (arrows) extending from the cranial subarachnoid space into the right sphenoid sinus.
