Abbreviation:<unk> 
Due to canalolithiasis (migration of otoconia into one of the semicircular canals)
Mean age is mid-50s; women are twice as likely to be affected as men
Mean duration is 2 weeks
Benign paroxysmal positional vertigo
Vestibular/otologic
Vestibular neuritis
Benign paroxysmal positional vertigo 
Labyrinthitis
Traumatic 
Cluster headache
Infection