Fig. 1
From: CSF rhinorrhea: non-contrast CT, contrast-enhanced CT cisternography or combined?
Non-contrast CT with bone window in coronal and sagittal planes (A and B) show bony defect (3 mm) at roof of right compartment of sphenoid sinus (white arrow), CT cisternography in coronal plane (C) show CSF active contrast leak through that bony defect (black arrow) into the right sphenoid sinus (D), right frontal sinus (E) and right nasal cavity (F)