47-year-old female who had the onset of persistent vertigo. The first evaluations revealed right beating nystagmus on gaze straight and to the right, unsteady gait with limb ataxia, and positive head thrust to the left. Improvement seemed to be occurring in that gait deviation with eyes closed was no longer present. Vestibular physical therapy exercises were started. On the next evaluations there was paroxysmal positional vertigo from the left ear and minimal neurosensory hearing loss. An audiogram showed minor neurosensory deafness.

41 year-old male was recently diagnosed as having multiple sclerosis (MS) after episodes of leg and shoulder weakness and parasthesis. Lately he experiences dizziness. His MRI showed several demyelinating lesions, other ancillary tests showed demyelinating damage to the auditory and visual pathway. Currently he has no functional or sensorial deficiencies. He was offered several immunomodulatory treatment options: Rebif, Betaferon and Copaxone, and asks about their pros, cons and complications, and about the differential diagnosis.