Defekt in der Lamina cribrosa des Os ethmoidale

Non-allergic

rhinitis: a case report and review. Preoperative CT scan of the head. A preoperative CT scan of the head with intrathecal contrast was done to localize the CSF leak. The frontal view is shown here. The scan shows a defect in the cribriform plate with confluent CSF extension into several bilateral ethmoid air cells, evidenced by the higher intensity signal of the contrast. Secondarily, there is mucosal thickening in the ethmoid and maxillary sinuses.

CSF

rhinorrhea: non-contrast CT, contrast-enhanced CT cisternography or combined?. Non-contrast CT in coronal plane (A) shows defect in left cribriform plate of ethmoid (white arrow), CT cisternography in coronal and axial planes (B&C) show: contrast leak through left cribriform plate of ethmoid (black arrow) (B) to the left nasal cavity and left sphenoid sinus (arrowhead and star) (C). Note previous left middle turbinectomy, partial excision of nasal septum, minimal mucosal thickening of both maxillary sinuses and mildly deviated nasal septum to the right side (A and B)

CSF

rhinorrhea: non-contrast CT, contrast-enhanced CT cisternography or combined?. Non-contrast CT with bone window in coronal plane (A) shows no bone defect, CT cisternography in coronal and sagittal planes (B and C, respectively) show: CSF contrast leak into the right ethmoidal sinus (white arrow). Note mild bilateral mucosal thickening of both maxillary sinuses, left nasal septum spur and mildly deviated nasal septum to the left side

CSF

rhinorrhea: non-contrast CT, contrast-enhanced CT cisternography or combined?. Non-contrast CT in coronal (A), CT cisternography in coronal (B), sagittal (C) and axial (D) planes show defect measuring 6 mm in the roof of the right ethmoid sinus (white arrow) (A and B) with evidence of contrast leak through this defect in addition to herniated brain tissue from the right frontal lobe (black arrow) (C and D)