BACKGROUND AND PURPOSE Defects at the skull base leading to spontaneous CSF rhinorrhea are rare lesions. The purpose of our study was to correlate CT and MR findings regarding the location and content of CSF leaks in 27 patients with endoscopic sinus surgery observations. MATERIALS AND METHODS Imaging studies in 27 patients with intermittent CSF rhinorrhea (CT in every patient including 10 ex...

A paranasal sinus mucocele is an epithelial-lined, mucus-containing sac that completely fills the and forms expandable cystic structure. It most commonly affects frontal ethmoidal sinuses, rarely maxillary sphenoid sinuses. Orbital displacement or external disfigurement resulting from expansion of ethmoid sinuses common; however, facial asymmetry caused by bone remodeling rare. We describe a ca...

Objective: To determine the Keros classification and asymmetrical distribution rates of the ethmoid roof and the frequency of anatomic variations of the paranasal sinuses. Materials and Methods: Paranasal sinus scans of 500 patients obtained using computed tomography were evaluated retrospectively. Measurements were performed using a coronal plan with right-left comparison and with distance mea...

BACKGROUND AND PURPOSE The CT appearance of the anterior skull base has been investigated but with limited attention directed to the olfactory recess. As defined by opacity abutting the undersurface of the cribriform plate, the prevalence of olfactory recess opacity (ORO) on sinus CT was examined to clarify whether this should raise suspicion for an unsuspected pathologic process. MATERIALS A...

Giant mucoceles of the frontal sinus are rare but their recognition is important in the differential diagnosis of proptosis and fronto-orbital lesions. The authors describe a patient with frontal giant mucocele with intracranial as well as orbit and ethmoid sinus involvement. Thirty-two years after a frontal sinus fracture, a 51-year-old female presented with headache, and left exophthalmos and...