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  • Title: Selective vestibular damage in neurosarcoidosis.
    Author: von Brevern M, Lempert T, Bronstein AM, Kocen R.
    Journal: Ann Neurol; 1997 Jul; 42(1):117-20. PubMed ID: 9225694.
    Abstract:
    We report a patient with neurosarcoidosis who developed bilateral benign paroxysmal positional vertigo (BPPV) of the posterior canals, deafness, and absent responses to conventional caloric and rotational vestibular testing. Additional rotation in the planes of the vertical semicircular canals revealed relative sparing of vertical canal function. This vertical-horizontal canal dissociation explains the presence of BPPV and suggests that the vestibular damage in this patient is secondary to a vasculitic neuropathy.
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