Migrainous vertigo presenting as episodic positional vertigo.

Migraine can cause vestibular symptoms including positional vertigo. Of 362 consecutive patients presenting with positional vertigo, 10 with migrainous vertigo mimicking benign paroxysmal positional vertigo (BPPV) were identified. The following factors help to distinguish migrainous positional vertigo from BPPV: short-duration symptomatic episodes and frequent recurrences, manifestation early in life, migrainous symptoms during episodes with positional vertigo, and atypical positional nystagmus.