for mastoidectomy, stapes surgery, cerebellopontine angle tumor
resection, and other otologic procedures).
The differential diagnosis includes glomus jugular tumors, cerebellopontine angle tumor
, malignant melanoma, esthesioneuroblastoma, undifferentiated carcinoma, lymphoma, and plasma cell granuloma.
The authors found six cases reported to have malignant degeneration after radiation therapy for a cerebellopontine angle tumor
Positional nystagmus has been reported in patients with a cerebellopontine angle tumor
, Arnold-Chiari malformation, multiple sclerosis, lateral medullary infarction, or brainstem contusion.
These lesions account for 8 to 10% of all intracranial tumors and more than 90% of all cerebellopontine angle tumors
They concluded that claudin-1 was a very useful adjunct to EMA in meningiomas with equivocal morphologic features or with weak/focal EMA expression, and that the lack of claudin-1 expression by schwannomas was very useful in the context of differential diagnosis with fibroblastic meningiomas, particularly of cerebellopontine angle tumors
Causes of symptomatic glossopharyngeal neuralgia include cerebellopontine angle tumors
, nasopharyngeal carcinomas, carotid aneurysms, tonsillar abscesses, neurilemmomas of cranial nerve IX, multiple sclerosis, and Eagle syndrome.
Marangos et al described a unique analysis of ABR thresholds in patients with cerebellopontine angle tumors.
Correlation of ABR and medical imaging in patients with cerebellopontine angle tumors.
Hypoglossal-facial nerve anastomosis for facial nerve palsy following surgery for cerebellopontine angle tumors
Computed tomography and/or magnetic resonance imaging can be obtained to rule out cerebellopontine angle tumors
and brainstem lesions, especially in patients with unilateral tinnitus.