cerebellopontine angle tumor

vestibular schwannoma

a benign but life-threatening tumor arising from Schwann cells, usually of the vestibular division of the eighth cranial nerve in early stage; produces hearing loss, tinnitus, and vestibular disturbances and in late stages cerebellar, brainstem, and other cranial nerve signs and increased intracranial pressure.

cerebellopontine angle tumor

Acoustic neuroma, see there.
References in periodicals archive ?
Early complications and symptoms of cerebellopontine angle tumor surgery: a prospective analysis.
Conclusion: The most common cerebellopontine angle tumor is acoustic neuroma which is followed by meningioma, epidermoid and arachnoid cyst.
Preoperative versus postoperative role of vestibular-evoked myogenic potentials in cerebellopontine angle tumor.
Finally, brain MRI performed one year later demonstrated interval resection of the right cerebellopontine angle tumor without evidence of residual tumor (Figure 3(d)).
Concurrent Vestibular Schwannoma and Meningioma Mimicking a Single Cerebellopontine Angle Tumor.
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.
2 Meningioma constitutes 5 10% of Cerebellopontine angle tumors with rare tumours constituting only a small percentage out of which epidermoid cyst is the most frequent.
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.