Clinically, the most common fluctuant hearing loss seen by the otologist is conductive in nature, and the most frequent etiology of conductive fluctuant hearing loss is nonsuppurative otitis media. Fluctuant neural (retrocochlear) hearing losses do occur but are rare and are usually missed in clinical practice. 6 Such cases were reported in 1962. In all patients, a diagnosis of multiple sclerosis had been established. Each patient had presented at some time during the course of his illness with sudden severe sensorineural hearing loss that had fluctuated back toward normalcy (remission). During early resolution, retrocochlear audiometric signs were featured; cochlear signs prevailed as the audiogram approached the normal range. Some audiograms returned completely to normal. Presumably the plaque had temporarily affected the cochlear division of the 8th nerve as it entered the brain stem, producing the retrocochlear audiometric patterns seen clinically. The remainder of this presentation is devoted to a discussion of fluctuant sensory (cochlear) hearing loss.
|Original language||English (US)|
|Number of pages||9|
|Journal||Otolaryngologic Clinics of North America|
|State||Published - Dec 1 1975|
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