Fig 5.

CSF rhinorrhea following head trauma in a 35-year-old man. A, Coronal thin-section CT scan reveals a defect in the roof of the sphenoid sinus (arrow) and opacification of the right sphenoid sinus. B, A coronal T1-weighted fat-saturated MR cisternogram obtained after the intrathecal administration of Gd-DTPA shows contrast leakage (arrow) extending from the cranial subarachnoid space into the right sphenoid sinus. C, After repair of the dural rupture, suspected CSF rhinorrhea recurred 1 week later and the patient underwent control MR cisternography. Images obtained in the first hour show probable leakage (arrow). D and E, Leakage becomes obvious in late images taken in the third and fifth hours (arrows).