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Low-frequency sensorineural hearing loss: a syndrome.

¹College of Medicine, Ain Shams University, Otolaryngology Department, Cairo, Egypt.

Audiology : Official Organ of the International Society of Audiology

|January 1, 1987

Summary

This study identifies a specific hearing loss pattern indicating central auditory pathway lesions. Early suspicion and investigation are crucial for diagnosing conditions like temporal lobe epilepsy or infections.

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Area of Science:

Audiology
Neurology
Otolaryngology

Background:

A distinct pattern of bilateral, low-frequency sensorineural hearing loss with poor speech discrimination was observed in eleven patients.
This presentation suggests potential involvement of the central auditory pathway.

Purpose of the Study:

To investigate the audiological and neurological characteristics of patients presenting with this specific hearing loss pattern.
To identify potential etiological factors and aid in the diagnosis of underlying conditions.

Main Methods:

Patients underwent comprehensive audiological evaluations including pure-tone audiometry, speech audiometry (Arabic), immittance testing, auditory brainstem response, and middle-latency response.
Neurological assessments included Arabic central auditory tests, electroencephalography (EEG), and computerized tomographic (CT) scans.

Main Results:

Diagnostic tests indicated lesions within the central auditory pathway in affected patients.
Infection and temporal lobe epilepsy were identified as two potential causes for this clinical presentation.

Conclusions:

The observed hearing loss pattern is a significant indicator of central auditory pathway dysfunction.
Audiologists and otologists should maintain a high index of suspicion for this syndrome to facilitate timely diagnosis and management.
Further investigations are essential to determine the precise etiology and nature of the syndrome.

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