Although up to 40% of leukemic patients may have otologic symptoms, sudden onset of sensorineural hearing loss is very rare. The patient presented in this report is the first reported case with a granulocytic sarcoma of the cerebellopontine angle who presented with acute sensorineural hearing loss. Despite the rarity of such a case, we would like to emphasize that leukemia must be kept in mind as an etiologic factor in sensorineural hearing loss and suggest that complete blood count and temporal bone imaging be routinely obtained.
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