Fossa navicularis magna detection on cone-beam computed tomography
Syed Ali Z., Mupparapu Mel,
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( Syed Ali Z. ) - Case Western Reserve University School of Dental Medicine Department of Oral and Maxillofacial Medicine and Diagnostic Sciences
( Mupparapu Mel ) - University of Pennsylvania School of Dental Medicine Division of Radiology
Abstract
Herein, we report and discuss the detection of fossa navicularis magna, a close radiographic anatomic variant of canalis basilaris medianus of the basiocciput, as an incidental finding in cone-beam computed tomography (CBCT) imaging. The CBCT data of the patients in question were referred for the evaluation of implant sites and to rule out pathology in the maxilla and mandible. CBCT analysis showed osseous, notch-like defects on the inferior aspect of the clivus in all four cases. The appearance of fossa navicularis magna varied among the cases. In some, it was completely within the basiocciput and mimicked a small rounded, corticated, lytic defect, whereas it appeared as a notch in others. Fossa navicularis magna is an anatomical variant that occurs on the inferior aspect of the clivus. The pertinent literature on the anatomical variations occurring in this region was reviewed.
키워드
Cone-Beam Computed Tomography; Skull Base; Clivus Fossa; Posterior; Multidetector Computed Tomography
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