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Idiopathic bilateral vestibulopathy

Department of Neurology, UCLA School of Medicine, Los Angeles, CA (Dr. Baloh and Ms. Jacobson)
Division of Head and Neck Surgery, UCLA School of Medicine, Los Angeles, CA (Drs. Baloh and Honrubia and Ms. Jacob-son)

We report the clinical features of 22 patients with acquired bilateral vestibulopathy of unknown cause. All had either absent or markedly decreased responses to both caloric and rotational testing. They presented with dysequilibrium and imbalance, worse at night; most reported oscillopsia but none had associated hearing loss or other neurologic symptoms. Nine reported prior prolonged episodes of vertigo consistent with the diagnosis of bilateral sequential vestibular neuritis. Of the remaining 13, none had exposure to known ototoxins or a positive family history. Idiopathic bilateral vestibulopathy is an important cause of progressive imbalance in adults and should be considered even though hearing is normal.

Address correspondence and reprint requests to Dr. Baloh, Department of Neurology, Reed Neurological Research Center, UCLA School of Medicine, Los Angeles, CA 90024.

Supported by NIH grants NS 09823 and NS 08335.

Received June 28, 1988. Accepted for publication in final form August 8, 1988.

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