PMC6402215_01
Sagittal (a), axial (b), and coronal (c) images in prone position with scanning during sneezing maneuver. CT cisternogram demonstrated leakage of intrathecally injected contrast (red arrow) noted in the right nasal cavity, along the right aspect of the perpendicular plate of nasal septum, just below the right cribriform plate. Empty sella filled with intrathecally injected contrast (blue arrow).
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It revealed evidence of leakage of intrathecally injected contrast into the right nasal cavity via the right olfalctory fossa, between the anterior ethmoidal cells and the crista galli bone (Figure 1).
Axial CT scan (a) and scout (b) of gauzes removed from both right (red arrow) and left (blue arrow) nostrils, after being inserted intentionally by the author (C.I.) during real-time cisternogram. This technique confirmed without doubt the presence of leaky contrast in the right nostril, compatible with CSF leakage.
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This was also confirmed by scanning the gauzes inserted intentionally into both right and left nares by the author (C.I.) during real-time CT cisternogram (Figure 2).