Bilateral cerebellopontine angle lipoma in an asymptomatic patient: a case report

We present here an asymptomatic case of a bilateral cerebello-pontine angle lipoma incidentally diagnosed by magnetic resonance imaging. Intracranial lipomas are rare and comprise just 0.1-1.5% of all intracranial tumors, and are mostly located in the corpus callosum. Cerebello-pontine angle (CPA) or internal acoustic canal (IAC) locations, on the other hand, are rather rare, and usually unilateral. Bilateral locations, as with the case presented here, were reported in only three cases in the literature. Cerebello-pontine angle and IAC lipomas typically infiltrate the neighboring cranial nerves (5, 7 and 8), causing progressive neurological deficits in 95% of cases. However, cases of bilateral CPA/IAC lipomas similar to this case are interesting because of their being asymptomatic.