La surdité est plus fréquente qu'elle ne devrait être. C'est une infirmité souvent évitable.—Parrel.
In spite of its rarity, toxic infectious involvement of the acoustic nerve should not be considered as of secondary importance, because of the severity it sometimes shows.
Disturbances of audition and equilibrium, deafness, and deaf-mutism after that condition are cited by authors as very important complications of the central nervous system.
Hintze, in 1802, was the first to notice this type of deafness; his patient was a 50-year-old man who had had endemic parotitis. In his book on diseases of the ear, Toynbee was the first to write on the complication. He described the disease precisely but did not explain its mechanism. Toynbee stated, "The special poison that produces the disease generally known as endemic parotitis is very often the cause of complete deafness." Undoubtedly, the nervous system is affected in these cases. Deafness is
AMARANTE RCL. Deafness Following Endemic Parotitis. AMA Arch Otolaryngol. 1956;63(1):8–10. doi:10.1001/archotol.1956.03830070010004
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