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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.

Author information

1
Department of Oral and Maxillofacial Radiology, University of Connecticut School of Dental Medicine, Farmington, CT, USA.
2
Division of Diagnostic Sciences and Therapeutics, University of Connecticut School of Medicine, Farmington, CT, USA.

Abstract

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.

KEYWORDS:

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

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