Sudden Sensorineural Hearing Loss Presenting Ten Days Late
A 52-year-old woman presents with a 10-day history of sudden left hearing loss and constant tinnitus. On day 3 a general practitioner diagnosed sudden sensorineural hearing loss and started prednisolone 1 mg/kg daily for 7 days, which she completed. She has no vertigo, no neurological symptoms, no noise exposure and no ototoxic medication. Otoscopy is normal. Audiometry shows a left 60 dB four-frequency average with 64% word recognition, and a normal right ear. Tympanometry is type A bilaterally. MRI with contrast is booked for the following week. She asks whether she should have been treated differently and whether her hearing can still improve.
1. What was the standard of care at day 3, and what would you have added at that point?
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Standard at day 3
- Sudden sensorineural hearing loss is a hearing emergency; treatment should start within 72 hours and ideally on the day of presentation.
- High-dose oral corticosteroids (e.g. prednisolone 1 mg/kg/day, up to 60 mg, for 7–14 days with taper) were appropriate and were started within the window; this part of her care met standard.
- However, she also needed same-day audiometry, otoscopy, tuning-fork testing and a full neurological examination, plus urgent MRI with contrast to exclude retrocochlear pathology, and blood tests for syphilis, autoimmune screen and fasting glucose if clinically indicated.
- Salvage intratympanic steroid is usually reserved for failure of primary therapy, but if oral steroids are contraindicated or poorly tolerated, intratympanic dexamethasone can be used as primary treatment.
- She should also have been counselled to avoid loud noise and to report vertigo or new neurological symptoms urgently.
2. What are the options now, 10 days in with no recovery, and what is the evidence for intratympanic steroids at this stage?
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Options
- Intratympanic corticosteroid salvage (dexamethasone 10–24 mg/mL or methylprednisolone 40 mg/mL) via the round window, typically 3–4 injections over 2 weeks, is reasonable in a patient with persistent profound loss after oral steroids.
- A further course of oral steroids is not usually added on top of recent high-dose treatment; if used, monitor glucose, blood pressure, mood and sleep.
- Hyperbaric oxygen has limited, low-quality evidence and is not standard in most units; it may be considered within 3 months in selected patients where available.
- Hearing aid or cochlear implant assessment if loss becomes profound and stable.
Evidence and framing
- Intratympanic salvage gives a modest additional chance of improvement, mainly in the 250–2000 Hz range; it is well tolerated and has less systemic effect than further oral steroids.
- It should be offered as an option, not promised as a cure, and the decision shared with the patient. Even with salvage, complete recovery is unlikely at 10 days with a 60 dB loss.
3. What is her prognosis, and how should the MRI result change management?
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Prognosis
- Favourable features: no vertigo, only moderate-to-severe loss rather than profound, and treatment was started within the window.
- Unfavourable features: age over 50, delay to ENT review, 60 dB average and reduced word recognition of 64%.
- Overall, roughly one-third recover substantially, one-third partially, and one-third have persistent loss; recovery plateaus by 3–6 months.
- Counselling should include realistic expectations, tinnitus management, communication strategies, and repeat audiometry at 6–8 weeks and 3 months.
MRI result
- If a vestibular schwannoma is found, the sudden loss may be due to tumour haemorrhage or compression; management is then tumour-specific (observation with serial imaging, stereotactic radiosurgery or surgery) and hearing rehabilitation.
- A normal MRI excludes retrocochlear disease but does not change the diagnosis of idiopathic sudden sensorineural hearing loss; it does, however, allow reassurance and avoids repeated imaging.
- If the MRI shows a small intracanalicular tumour with serviceable hearing, discuss options at a skull base multidisciplinary meeting rather than proceeding directly to surgery.