Sensorineural Hearing Loss Treatments Review

A 2025 review of 57 studies and 222 patients found that 43% of individuals diagnosed with otosyphilis reported tinnitus as a primary symptom. This analysis, led by researchers at MedStar Georgetown University Hospital, highlights a resurgent infectious disease that can directly impact hearing and balance, demanding increased clinical awareness.

### A Resurgent Infection with Direct Audiovestibular Impact

The research team, including Dr. C.A. Pittman and Dr. H.J. Kim, set out to clarify the contemporary management of otosyphilis. They noted that the COVID-19 pandemic coincided with a significant increase in syphilis cases reported by the CDC from 2016 to 2022. This resurgence necessitates that otolaryngologists and hearing health professionals recognize syphilis as a potential, though often overlooked, cause of hearing loss, tinnitus, and dizziness. The study’s objective was to develop an updated diagnostic and treatment protocol to prevent the worsening of these symptoms.

### How Researchers Compiled the Evidence

The team conducted a scoping review, a method designed to map the key concepts and available evidence in a field. They systematically searched major medical databases including MEDLINE, PubMed, Embase, Web of Science, and Cochrane. Their review complied with established PRISMA-ScR guidelines to ensure rigor and transparency. Beyond the literature, they also performed a retrospective case series, examining the medical charts of patients diagnosed with otosyphilis within their own tertiary care hospital network. This two-pronged approach allowed them to synthesize findings from global literature and validate them against local, real-world clinical experience.

### Otosyphilis Presents with Hearing Loss, Tinnitus, and Vertigo

The combined data painted a clear clinical picture. Across the 222 patients identified in the literature, hearing loss was the most common symptom, affecting 65%. Tinnitus was reported by 95 patients (43%), and vertigo or dizziness affected 53 (24%). The average duration of symptoms before diagnosis was 6.6 weeks, though nine patients had symptoms for over six months, indicating frequent delays or misdiagnosis.

Treatment data showed that 97% of patients received penicillin-based therapy. Of the 84 patients for whom clear outcomes were recorded, 48 (57%) experienced improvement in their symptoms. The supplemental data from the hospital’s own 18 patients—most of whom were male, with ages ranging from 25 to 87—showed similar variability in outcomes: six fully recovered, four required additional therapy, two partially recovered, and one showed no improvement. This underscores that while treatment is effective, recovery is not guaranteed and can be incomplete.

### Why Otosyphilis is Often Missed and How to Improve Diagnosis

The authors conclude that otosyphilis has an “insidious presentation” that can closely mimic more common conditions like sudden sensorineural hearing loss, Meniere’s disease, or autoimmune inner ear disease. This mimicry is a primary reason for diagnostic delay. A key challenge is the complex interpretation of syphilis serology (blood tests), which may require referral to an infectious disease specialist for clarity.

The practical implication is clear: for patients presenting with unexplained, asymmetric, or fluctuating hearing loss accompanied by tinnitus or vertigo—especially if they have risk factors for sexually transmitted infections—otosyphilis must be considered in the differential diagnosis. Early testing with a clear diagnostic protocol is essential. As the researchers state, this ensures timely treatment, which can stabilize or improve auditory and vestibular function and prevent further deterioration.

### Connecting to Broader Hearing Health and Management

This research reinforces a fundamental principle in auditory health: effective treatment depends on an accurate root-cause diagnosis. Tinnitus and hyperacusis are symptoms, not diseases themselves. When an underlying infectious cause like syphilis is identified and treated, the associated tinnitus may resolve or lessen, highlighting the importance of comprehensive medical evaluation. This approach aligns with the broader, integrative view of hearing disorders discussed in our article on Integrated Auditory Health.

Furthermore, the stress and anxiety caused by persistent, unexplained tinnitus and hearing loss can significantly impact sleep and mental well-being. While treating the infection is the first step, managing the secondary cognitive and emotional burden is also important. Evidence-based strategies for sleep maintenance, such as those outlined in the cross-site guide “Evidence-Based Sleep Hygiene Guide & Tips”, can be a valuable part of holistic patient support during recovery.

### A Call for Clinical Awareness in a New Context

The study (PMID: 40682371) serves as a timely alert. The resurgence of syphilis means otosyphilis is not a historical curiosity but a contemporary clinical issue. For patients, this means advocating for thorough investigation when hearing symptoms appear without a clear cause. For clinicians, it means maintaining a high index of suspicion and understanding the diagnostic pathway. By integrating this knowledge, the fields of otology and hearing health can better address one of the many potential causes of tinnitus and hearing loss, ensuring more patients receive the specific treatment they need for recovery.