Disorders · Introduction
Autoimmune inner ear disease
A rare cause of vertigo and hearing loss with an outsized importance: the immune system attacks the labyrinth, and — almost uniquely among the sensorineural causes — early steroids can stop or reverse it.
What AIED is
In autoimmune inner ear disease (AIED) the body’s own immune system mistakenly attacks the inner ear. This inflames and damages the parts that handle hearing and balance, causing hearing loss that worsens over weeks to months, often in both ears, together with vertigo, tinnitus and a feeling of fullness. The key point: caught early, it can often be treated with steroids.
AIED is an immune-mediated attack on inner-ear antigens, breaching the normally immune-privileged blood–labyrinth barrier and inflaming the cochlea and vestibular apparatus. First defined by McCabe in 1979, its hallmark is rapidly progressive bilateral sensorineural hearing loss, with vestibular symptoms in up to half of patients.1,2
AIED accounts for under 1% of all SNHL and is almost certainly under-diagnosed: there is no confirmatory test, and it mimics Ménière’s disease, vestibular migraine and idiopathic sudden SNHL.3 The clinical reward for recognising it is large — steroid responsiveness is both a diagnostic clue and a chance to preserve hearing and balance before the damage becomes irreversible.4
Why it matters
- It is treatable. Unlike most causes of progressive SNHL, early immunosuppression can stabilise or reverse the loss.
- It is time-critical. Delay lets inflammation destroy hair cells, supporting cells and neurons permanently.
- It is a great mimic. Bilateral, fluctuating, steroid-responsive disease should raise suspicion when “Ménière’s” behaves atypically.
- It can be systemic. The inner ear may be the first or loudest sign of a wider autoimmune disease.5
How this chapter is organised
- Pathophysiology — the blood–labyrinth barrier, autoantigens, and the four immune mechanisms of injury.
- Clinical features — the rapidly progressive bilateral SNHL, the vestibular component, and the course.
- Systemic autoimmune disease — Cogan’s, SLE, GPA, APS and others that strike the inner ear, in an interactive explorer.
- Diagnosis & differential — history, audiovestibular testing, serology, imaging, and the conditions to exclude.
- Treatment & prognosis — corticosteroids, steroid-sparing agents, biologics, rehabilitation, and the future.
Key points
- AIED is an immune attack on the inner ear causing rapidly progressive, often bilateral SNHL with vertigo.
- It is rare (<1% of SNHL), under-diagnosed, and has no confirmatory test.
- Its defining importance is treatability — early corticosteroids can stabilise or reverse it.
- It mimics Ménière’s disease; bilaterality, rapid progression and steroid response are the clues.
- It may be primary (organ-specific) or part of a systemic autoimmune disease.