Vestibular schwannoma is a benign tumor of the Schwann cells of the vestibular portion of the 8th cranial nerve (Vestibulocochlear nerve) and is a classic tumor in the Cerebellopontine angle.
Classification
Vestibular schwannomas can be classified according to various classification systems. The Koos classification and Samii classification are two classifications used clinically. According to the WHO classification, vestibular schwannomas are classified as WHO Grade 1 tumors.
Symptoms
The typical symptoms leading to the diagnosis of a vestibular schwannoma are progressive hearing loss on the affected side as well as tinnitus. Vertigo may also occur[^2].
Growth rate
The average growth rate of vestibular schwannomas is 1,15 ± 2,4 mm per year in the absence of known risk factors for faster or slower growth[^1] [^3].
Imaging
The gold standard in the imaging diagnosis of vestibular schwannomas is MRI imaging.
Videos
Endoscopic-assisted microsurgical resection of giant vestibular schwannoma in semi-sitting position.
Operative video of the endoscopic-assisted microsurgical resection of a Koos grade IV vestibular schwannoma.