A 40-year-old woman comes to the physician for a 2-day history of worsening balance and dizziness. She reports a mild decrease in appetite and nausea. Her brother has multiple sclerosis. Physical examination shows a mid-systolic click. Blood pressure is 135/85. The light reflex is distorted. There are no motor or sensory abnormalities. Reflexes are normal. Which of the following is the most likely explanation for these findings?
Benign paroxysmal positional vertigo
Labyrinthitis
Meniere disease
Multiple sclerosis
Stroke
