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Cerebellopontine angle cavernous hemangioma
from: Mônica Porto Alves Alcantara 1, Paulo Roberto Lazarini 2, José C. E. Veiga 3, Erick S. Barboza 4, Carmen L. P. Lancellotti 5 BRAZILIAN JOURNAL OF OTORHINOLARYNGOLOGY 72 (6) NOVEMBER/DECEMBER 2006.Cavernous hemangioma, also known as cavernous angioma, accounts for 10-20% of vascular malformations.1, 2.
Extra-axial lesions are rare. Most tumors are found in the sinuses, Meckel’s cavity, posterior fossa, including the cerebellar-pontine angle and internal auditory meatus.3
This paper reports the clinical case of a patient with cavernous hemangioma involving the internal auditory meatus whose initial diagnosis was ves- tibular schwannoma.
In this case report a patient with cavernous hemangioma in the internal auditory meatus came to our service complaining of auditory loss accompanied by humming and sporadic dizziness. The patient’s facial nerve was not involved. Even though some authors4,5 claim this type of tumor often involves the nerve, the literature review done by Babu et al.1 concluded that peripheral facial palsy is not a frequent finding.
A s y m m e t r i c auditory loss and ves- tibular examination suggesting vestibular deficit syndrome led us to consider the presence of a tumor in the retro-cochlear area later visualized in MRI. It is worth mentioning that MRI is more sensitive and more specific than CT1, 3, 5. In our case, CT scans found no abnormalities in spite of the hemangioma in the patient’s internal auditory meatus.
Cavernous hemangiomas in the internal auditory meatus are rare and may be characterized by unilateral sensorineural auditory deficiency. MRI is the technique of choice to achieve differential diagnosis. Final diagnosis can only be reached after pathology exam.
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