Vestibular schwannomas are tumors derived from the sheat of the VIII cranial nerve. They frequently result in dizziness, vertigo, hearing loss, and facial palsy.
Figure 1. A representative horizontal human temporal bone section from a 76-year-old man with vestibular schwannoma, stained by H&E. (A): The tumor is present in the distal internal auditory canal. Hydrops and protein precipitate (*) are present in the cochlea and vestibule. (b) A magnified view of boxed area shown in panel a. Boxed area in panel b corresponds to Figure 1a. IAC, internal auditory canal.