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Imaging Sci Dent. 2014 Jun;44(2):165-9. doi: 10.5624/isd.2014.44.2.165. Epub 2014 Jun 11.

Clival lesion incidentally discovered on cone-beam computed tomography: A case report and review of the literature.

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Department of Oral and Maxillofacial Radiology, University of Connecticut School of Dental Medicine, Farmington, CT, USA.
Division of Diagnostic Sciences and Therapeutics, University of Connecticut School of Medicine, Farmington, CT, USA.


An osteolytic lesion with a small central area of mineralization and sclerotic borders was discovered incidentally in the clivus on the cone-beam computed tomography (CBCT) of a 27-year-old male patient. This benign appearance indicated a primary differential diagnosis of non-aggressive lesions such as fibro-osseous lesions and arrested pneumatization. Further, on magnetic resonance imaging (MRI), the lesion showed a homogenously low T1 signal intensity with mild internal enhancement after post-gadolinium and a heterogeneous T2 signal intensity. These signal characteristics might be attributed to the fibrous tissues, chondroid matrix, calcific material, or cystic component of the lesion; thus, chondroblastoma and chondromyxoid fibroma were added to the differential diagnosis. Although this report was limited by the lack of final diagnosis and the patient lost to follow-up, the incidental skull base finding would be important for interpreting the entire volume of CBCT by a qualified oral and maxillofacial radiologist.


Cone-Beam Computed Tomography; Cranial Fossa, Posterior; Incidental Findings; Skull Base Neoplasms

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