Vertigo sustained for >1min after Dix Hallpike maneuver; specifically want to evaluate for acoustic schwannoma: nystagmus, tinnitus. The bilateral cranial nerve 7 and 8 complexes are intact. There is no evidence of mass lesions. The inner ear structures, including the cochlea, vestibule, endolymphatic duct, and semicircular canals, appear unremarkable. The bilateral mastoid air cells and middle ears also appear unremarkable.
No evidence of vestibular schwannoma.