What is the most common tumor of the cerebellopontine angle?
What is the most common tumor of the cerebellopontine angle?
The most common cerebellopontine angle (CPA) tumor is a vestibular schwannoma, but one in five CPA tumors are not vestibular schwannomas. These tumors may require different management strategies.
What causes cerebellopontine angle tumors?
Causes. In most cases, the cause of acoustic neuromas is unknown. The only statistically significant risk factor for developing an acoustic neuroma is having a rare genetic condition called neurofibromatosis type 2 (NF2). There are no confirmed environmental risk factors for acoustic neuroma.
What is cerebellopontine angle tumor?
Cerebellopontine angle (CPA) tumors are the most common neoplasms in the posterior fossa, accounting for 5-10% of intracranial tumors. Most CPA tumors are benign, with over 85% being vestibular schwannomas (acoustic neuromas), lipomas, vascular malformations, and hemangiomas.
Which nerve can be affected by the Cerebellopontine Tumour?
The most common presenting symptoms of lesions involving the CPA include hearing loss, tinnitus, dizziness, vertigo, headaches, and gait dysfunction. Hearing loss is mostly unilateral sensorineural and is due to the involvement of the cochlear nerve.
Where is the cerebellopontine angle located?
The cerebellopontine angle (CPA) is a triangular space located posterior to the pyramid, inferior to the tentorium, lateral to the pons, and ventral to the cerebellum. It is formed by the superior and inferior limbs of the cerebellopontine fissure.
What is the meaning of Cerebellopontine?
Listen to pronunciation. (SAYR-eh-BEH-loh-PON-teen) Having to do with two structures of the brain, the cerebellum (located at the lower back of the brain) and the pons (located at the base of the brain in front of the cerebellum) and the area between them.
Where is the cerebellopontine angle?
Is the cerebellopontine angle in the brain?
The cerebellopontine angle is a space filled with spinal fluid. It has the brain stem as its medial boundary, the cerebellum as its roof and posterior boundary, and the posterior surface of the temporal bone as its lateral boundary.
What does the cerebellopontine angle do?
Structure. The cerebellopontine angle is formed by the cerebellopontine fissure. This fissure is made when the cerebellum folds over to the pons, creating a sharply defined angle between them. The angle formed in turn creates a subarachnoid cistern, the cerebellopontine angle cistern.
Where is cerebellopontine angle located?