Otosclerosis

When Your Ears Start Keeping Secrets

 The Sound That Disappeared

Sarah noticed it during her daughter's piano recital. The middle C key the one her child had practiced for weeks  seemed to fade in and out, like someone was slowly turning down the volume on just that one note. At first, she blamed the church acoustics. Then she blamed her age. By the time she found herself asking her husband to repeat himself three times at dinner, she knew something wasn't right.

That "something" was otosclerosis. And honestly? Sarah's story is more common than most people realize.

What Actually Happens Inside Your Ear

Here's the thing about otosclerosis  it sounds scarier than it often is, but it deserves your full attention.

Your middle ear contains three tiny bones called ossicles: the malleus, incus, and stapes. Think of them as a microscopic relay team that passes sound vibrations from your eardrum to your inner ear. The stapes the smallest bone in your entire body, by the way  is usually the one that gets into trouble.

In otosclerosis, abnormal bone remodeling occurs around the stapes footplate, where it connects to the oval window of the cochlea. This new bone growth essentially "fixes" the stapes in place. And when your smallest bone can't move, sound can't travel properly. Simple as that.

But here's what surprised me during my years in clinical practice: most patients don't come in complaining of hearing loss. They come in saying, "I can hear fine in quiet rooms, but restaurants are impossible," or "My own voice sounds weirdly loud." That second symptom  hearing your own voice booming in your head is called autophony, and it's actually a pretty reliable clue.

The Genetics Nobody Talks About At Family Dinners

Otosclerosis runs in families. Full stop. If you have a first-degree relative with the condition, your risk jumps significantly estimates suggest up to 50% of cases have a genetic component, and if both parents have otosclerosis, the risk to offspring may be as high as 50% [1][2]. The condition is linked to variations in several genes, including TGFB1, and genome-wide association studies have identified associations with novel candidate regions such as MEPE and ACAN [3][4].

But here's where it gets interesting: not everyone with the genetic predisposition actually develops symptoms. Some people carry the blueprint but never build the house, so to speak. The hereditary pattern is predominantly complex, involving both environmental and genetic factors a model already described for other relatively common diseases [2].

And yes, it's more prevalent in women than men at a ratio of about 2:1 [2][5]. Some researchers think estrogen plays a role; others argue it's just that women seek help sooner. The truth probably lies somewhere in between.

Pregnancy and Hormones: The Controversy

This is where things get complicated. For decades, clinicians observed that otosclerosis often worsened during or after pregnancy, leading to the widespread belief that hormonal changes  specifically elevated estrogen accelerated the disease [6][7].

However, recent large-scale studies have challenged this assumption. A case-control study of 1,196 women found no significant relationship between endogenous estrogen exposure (including pregnancy history) and the development or severity of otosclerosis [5]. Similarly, the Brazilian Society of Otology's 2023 task force concluded there is no evidence that pregnancy increases the risk of developing or worsening otosclerosis [8].

That said, some women do report subjective hearing deterioration during pregnancy. The discrepancy may reflect recall bias in retrospective studies, or the possibility that hormones affect ligament elasticity in ways that temporarily mask or unmask hearing deficits [6]. The bottom line? If you're pregnant and noticing hearing changes, get checked  but don't assume the worst.

The Symptoms That Don't Make Sense (Until They Do)

Most people expect hearing loss to be straightforward: sounds get quieter, end of story. Otosclerosis doesn't play by those rules.

The classic presentation is conductive hearing loss that begins in one ear and gradually involves the other. But the pattern matters. Low-frequency sounds like men's voices or the bass line in music typically fade first. Patients often describe it as "muffled" rather than "quiet." One woman told me it felt like she was "hearing the world through a thick blanket." That's actually a perfect description.

Tinnitus accompanies the hearing loss in a majority of cases. The ringing isn't loud enough to drive you crazy, usually  it's more like a persistent background hum that you notice most when everything else goes quiet. At 2 AM, when the house is silent, that hum becomes your companion.

And then there's the paracusis of Willis. Sounds fancy, right? It basically means you hear better in noisy environments than quiet ones. Seems backwards, but it happens because background noise forces people to speak louder, and the increased volume overcomes the conductive block. I've had patients genuinely confused about why they can follow conversations at parties but struggle during one-on-one chats at home.

If you walk into an ENT clinic with gradual hearing loss and a family history, your doctor's brain should immediately flag otosclerosis. But confirming it requires more than just looking in your ear with an otoscope which, by the way, usually looks completely normal in these patients. That's actually part of the puzzle; a normal-looking ear with abnormal hearing is a big red flag.

Audiometry is where the magic happens. The hearing test reveals a characteristic "Carhart notch" a dip in bone conduction thresholds at 2,000 Hz. It's not actually a true sensorineural loss; it's an artifact of how the stiffened stapes affects bone-conducted sound measurement. Some of my younger colleagues get tripped up by this and mistakenly diagnose mixed hearing loss [1].

Tympanometry often shows reduced compliance meaning your eardrum doesn't move as freely as it should because the ossicular chain is locked up. And acoustic reflexes? Usually absent or elevated. When I explain this to patients, I tell them it's like trying to measure how a door swings when someone has nailed it shut.

In some cases, especially when sensorineural components are suspected, we order CT imaging of the temporal bones. The scans might show demineralization around the cochlea  a finding called the "double-ring" or "halo" sign. But honestly? We don't image everyone. A good history and a solid audiogram tell us most of what we need to know.

Treatment: Surgery Isn't Always the Answer

Let's address the elephant in the room. Yes, stapedectomy (or its modern variant, stapedotomy) can restore hearing remarkably well. The surgeon removes part or all of the fixed stapes and replaces it with a tiny prosthesis usually made of stainless steel, platinum, or Teflon [9].

Success rates are strong: successful closure of the air-bone gap occurs in approximately 90% of primary cases and 70% of revision cases [9]. A 2016 retrospective study of 54 stapedotomy procedures found that 94.4% of patients achieved some level of hearing improvement, with 61.1% achieving complete air-bone gap closure to within 10 dB [10].

But surgery carries risks. Facial nerve injury, though rare. Dizziness that can last days or weeks. And perhaps most concerning: profound sensorineural hearing loss  the "dead ear" complication  occurs in approximately 0.6% to 4% of cases, with revision surgery carrying substantially higher risk [9][11]. I've seen it once in my career. Once was enough.

So who gets surgery? Younger patients with purely conductive loss in one ear. People whose hearing loss significantly impacts their work or relationships. Individuals who've tried hearing aids and found them unsatisfying. And crucially  people who understand the risks and still want to proceed. The surgeon's experience, by the way, plays a greater role in success and safety than the specific operative technique chosen [9].

For everyone else, hearing aids work beautifully. Modern digital devices can be programmed specifically for the low-frequency conductive loss pattern typical of otosclerosis. The Brazilian Society of Otology task force confirms that among nonsurgical treatment options, hearing devices provide the best results [8]. They're not a cure, obviously. But they restore function without putting your inner ear at surgical risk. Some of my happiest patients are the ones who chose this route.

Sodium fluoride has been studied as a medical therapy  the theory being that it slows abnormal bone turnover. The evidence is... mixed, to be generous. Some otologists swear by it; others consider it placebo with side effects. The 2023 Brazilian guidelines note that drug treatment has shown little benefit [8]. I fall somewhere in the middle I'll discuss it with motivated patients, but I don't push it.

Medical textbooks end at treatment. Real life doesn't.

The social impact of gradual hearing loss is underestimated. Spouses get frustrated repeating themselves. Colleagues mistake hearing difficulty for inattention. Patients withdraw from restaurants, church services, family gatherings not because they don't want to participate, but because the effort of straining to hear exhausts them.

I always tell my patients: advocate for yourself. Tell people you're hard of hearing. Ask them to face you when speaking. Choose seating against walls in noisy restaurants to reduce background sound. These aren't crutches; they're strategies.

And monitor your hearing regularly. Otosclerosis is progressive, but the rate varies wildly. Some patients lose a few decibels per year; others stay stable for decades. Annual audiograms let us catch changes early and adjust management before the loss becomes severe.

The Bottom Line

Otosclerosis isn't an emergency. It won't kill you, and it won't make you deaf overnight. But it will slowly, quietly reshape how you experience the world if you ignore it.

The good news? We can help. Whether through precise surgery, sophisticated hearing technology, or simply watching and waiting with a good monitoring plan you have options. Real options. Not perfect ones, but honest ones.

If you're reading this because you recognized yourself in Sarah's story, do this one thing: make the appointment. The piano recitals in your life deserve to be heard fully.

References

[1] Makarem AO, Hoang TA, Lo WW, et al. Otosclerosis. StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024. Available from: https://www.ncbi.nlm.nih.gov/books/NBK560671/

[2] Cremers CWRJ, et al. Exploring the genetic landscape of otosclerosis. PMC. 2025. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC12180553/

[3] Ziff JL, et al. Genome-wide screen of otosclerosis in population biobanks. Nature Communications. 2023;14:5157. Available from: https://www.nature.com/articles/s41467-022-32936-3

[4] Bittermann AJ, Wegner I, Noordman BJ, et al. An introduction of genetics in otosclerosis: a systematic review. Otolaryngol Head Neck Surg. 2014;150(1):34-9.

[5] Macielak M, et al. Pregnancy, Estrogen Exposure, and the Development of Otosclerosis: A Case-Control Study of 1196 Women. PMC. 2021. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC8076328/

[6] Aimoni C, et al. The effect of female hormone in otosclerosis. A comparative study and speculation about their effect on the ossicular chain based on the clinical results. PMC. 2022. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC9474451/

[7] Sølvsten Sørensen M, et al. Does pregnancy have an influence on otosclerosis? Journal of Laryngology & Otology. 2026. Available from: https://www.cambridge.org/core/journals/journal-of-laryngology-and-otology/article/does-pregnancy-have-an-influence-on-otosclerosis/7701D666E846C0772C84CE1706DBA78E

[8] Brazilian Society of Otology Task Force. Otosclerosis: evidence-based recommendations for diagnosis and treatment. PMC. 2023. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC10474207/

[9] Stapes Surgery for Otosclerosis. StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025. Available from: https://www.ncbi.nlm.nih.gov/books/NBK562205/

[10] Adedeji TO, et al. Stapedotomy and its effect on hearing. PMC. 2016. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC4915420/

[11] Shea JJ. Complications of stapedectomy. In: Otosclerosis. Springer; 2024. Available from: https://link.springer.com/chapter/10.1007/978-94-009-5002-3_49

Medical Disclaimer

**IMPORTANT: Please Read Carefully**

This article is intended for **informational and educational purposes only**. It is **not a substitute for professional medical advice, diagnosis, or treatment**.

- **Always seek the advice** of your physician, audiologist, or other qualified healthcare provider with any questions you may have regarding a medical condition.

- **Never disregard professional medical advice** or delay in seeking it because of something you have read in this article.

- The information presented here is based on currently available medical literature and reflects general clinical knowledge as of the publication date. Medical knowledge evolves continuously, and recommendations may change.

- **Individual cases vary significantly.** What applies to one patient may not apply to another. Only a qualified healthcare professional who has examined you personally can provide an accurate diagnosis and appropriate treatment plan.

- The patient stories and clinical scenarios described in this article are **composite narratives** based on typical presentations. They are not descriptions of actual individuals, and any resemblance to real persons is coincidental.

- The author of this article is presented in a narrative voice for readability. This does not imply that the content was written by a licensed physician, nor should it be interpreted as establishing a doctor-patient relationship.

- **If you are experiencing hearing loss, tinnitus, vertigo, or any other ear-related symptoms, please consult an otolaryngologist (ENT specialist) or your primary care physician promptly.**

*Last updated: July 2026*