Cerebellopontine angle meningioma
Headache and tinnitus
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Right CPA mass, displays isointense signal in T1, slightly bright T2 and FLAIR signal and exerts positive mass effect in form of compression of right side of pons.
The mass is durally based and exhibits avid enhancement after contrast administration. No intracanalicular extension.
This case illustrates typical appearances of a cerebellopontine angle meningioma, a diagnosis which in this instance can be made with a great deal of confidence. The general differential to be considered when evaluating a CPA mass includes:
- vestibular shwannoma - in this case there is no intracanalicular extension
- other clearly non-viable alternative diagnoses
- epidermoid cyst: no enhancement
- arachnoid cyst: no enhancement and follow CSF signal in all sequences
- lipoma: follow fat signal without enhancement
- Buetow MP, Buetow PC, Smirniotopoulos JG. Typical, atypical, and misleading features in meningioma. Radiographics. 1991;11 (6): 1087-106. Radiographics (abstract) - Pubmed citation
- Osborn A, Blaser S, Salzman K. Encyclopedia of Diagnostic Imaging. AMIRSYS. (2008) ISBN:0721629059. Read it at Google Books - Find it at Amazon