SELECTIVE VESTIBULAR DAMAGE IN NEUROSARCOIDOSIS

We report a patient with neurosarcoidosis who developed bilateral beni gn paroxysmal positional vertigo (BPPV) of the posterior canals, deafn ess, and absent responses to conventional caloric and rotational vesti bular testing. Additional rotation in the planes of the vertical semic ircular canals revealed relative sparing of vertical canal function. T his vertical-horizontal canal dissociation explains the presence of BP PV and suggests that the vestibular damage in this patient is secondar y to a vasculitic neuropathy.