Inner Ear, Autoimmune Disease 

  • Author: Neeraj N Mathur, MBBS, MS; Chief Editor: Arlen D Meyers, MD, MBA   more...
 
Updated: Oct 16, 2009
 

Background

In 1979, McCabe first described a cohort of patients with idiopathic, rapidly progressive bilateral sensorineural hearing loss (SNHL). These patients' hearing improved after treatment with corticosteroids, thereby suggesting an autoimmune pathogenesis. The hallmark of this clinically diagnosed condition is the presence of a rapidly progressive, often fluctuating, bilateral SNHL over a period of weeks to months. The progression of hearing loss is too rapid to be diagnostic for presbycusis and too slow to conclude a diagnosis of sudden SNHL. Vestibular symptoms, such as true vertigo, generalized imbalance, and ataxia, may be present.

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Pathophysiology

The term autoimmune inner ear disease (AIED) implies a direct attack of the immune system upon an endogenous inner ear antigen. Most of the evidence linking the immune system to cochleovestibular dysfunction is indirect; therefore, immune-mediated inner ear disease may be a preferred term. AIED is a clinical diagnosis based on its distinct clinical course, immune test results, and treatment response. The most important diagnostic finding is improvement in hearing observed with a trial of immunosuppressants.

Specific criteria for idiopathic progressive bilateral sensorineural hearing loss (IPBSNHL) include bilateral SNHL of at least 30 dB at any frequency with progression in at least one ear, defined as a threshold shift that is greater than 15 dB at any frequency or 10 dB at 2 or more consecutive frequencies or a significant change in discrimination score. This definition excludes patients with sudden SNHL occurring in less than 24 hours, which more likely is due to a microvascular or viral etiology.

A certain subset of patients with presumed Ménière disease (idiopathic endolymphatic hydrops) actually may have Ménière syndrome, in which the underlying pathophysiology is immune mediated. Typically, Ménière disease is initially diagnosed in these patients; however, fluctuating hearing loss in the contralateral ear develops later. This change may prompt a workup for AIED. Hughes et al found that approximately one half of their patients with AIED have manifestations of autoimmune Ménière syndrome.[1]

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Epidemiology

Frequency

United States

Because the existence of autoimmune inner ear disease (AIED) has been recognized only since 1979, incidence is difficult to determine. Recent studies in the literature from large referral centers are based on relatively small sample sizes of patients who fit the criteria for diagnosis of AIED. As diagnostic tests for the condition become more specific and more is known about AIED, more patients will be identified who have an autoimmune basis for inner ear symptoms.

Sex

The condition has been suggested to be more common in female patients who may or may not have concomitant systemic autoimmune disease than in male patients.

Age

In most patients, initial onset of symptoms occurs at age 20-50 years. Cases in pediatric patients are uncommon.

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Contributor Information and Disclosures
Author

Neeraj N Mathur, MBBS, MS  Professor, Department of Ear, Nose and Throat, Lady Hardinge Medical College and Associated Smt SK and Kalawati, Saran Children's Hospital, University of Delhi, India; Professor and Head, Department of Ear, Nose and Throat, BP Koirala Institute of Health Sciences, Nepal

Neeraj N Mathur, MBBS, MS is a member of the following medical societies: Association of Otolaryngologists of India, Cochlear Implant Group of India, Indian Medical Association, National Academy of Medical Sciences, India, Neuro-Otologic and Equlibriometric Society of India, and Royal Society of Medicine

Disclosure: Nothing to disclose.

Specialty Editor Board

Robert A Battista, MD, FACS  Assistant Professor of Otolaryngology, Northwestern University Medical School; Physician, Ear Institute of Chicago, LLC

Robert A Battista, MD, FACS is a member of the following medical societies: American Academy of Otolaryngology-Head and Neck Surgery, American College of Surgeons, American Neurotology Society, and Illinois State Medical Society

Disclosure: Nothing to disclose.

Francisco Talavera, PharmD, PhD  Senior Pharmacy Editor, eMedicine

Disclosure: eMedicine Salary Employment

Peter S Roland, MD  Professor, Department of Neurological Surgery, Professor and Chairman, Department of Otolaryngology-Head and Neck Surgery, Director of Clinical Center for Auditory, Vestibular and Facial Nerve Disorders, Chief of Pediatric Otology, University of Texas Southwestern Medical Center; Adjunct Professor of Communicative Disorders, University of Texas School of Human Development

Peter S Roland, MD is a member of the following medical societies: Alpha Omega Alpha, American Academy of Otolaryngic Allergy, American Academy of Otolaryngology-Head and Neck Surgery, American Auditory Society, American Laryngological Rhinological and Otological Society, American Neurotology Society, American Otological Society, North American Skull Base Society, and Society of University Otolaryngologists-Head and Neck Surgeons

Disclosure: Alcon labs Honoraria Speaking and teaching; GSK Honoraria Speaking and teaching; Advanced Bionics Honoraria Board membership; Cochlear corp Honoraria Board membership; Med El corp travel grants Consulting

Christopher L Slack, MD  Otolaryngology-Facial Plastic Surgery, Private Practice, Associated Coastal ENT; Medical Director, Treasure Coast Sleep Disorders

Christopher L Slack, MD is a member of the following medical societies: Alpha Omega Alpha, American Academy of Facial Plastic and Reconstructive Surgery, American Academy of Otolaryngology-Head and Neck Surgery, and American Medical Association

Disclosure: Nothing to disclose.

Chief Editor

Arlen D Meyers, MD, MBA  Professor, Department of Otolaryngology-Head and Neck Surgery, University of Colorado School of Medicine

Arlen D Meyers, MD, MBA is a member of the following medical societies: American Academy of Facial Plastic and Reconstructive Surgery, American Academy of Otolaryngology-Head and Neck Surgery, and American Head and Neck Society

Disclosure: Covidien Corp Consulting fee Consulting; US Tobacco Corporation unstricted gift unknown; Axis Three Corporation Ownership interest Consulting; Omni Biosciences Ownership interest Consulting; Sentegra Ownership interest Board membership; Syndicom Ownership interest Consulting; Oxlo Consulting; Medvoy Ownership interest Management position

References

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