前庭神経由来の無症候性神経鞘腫3症例の側頭骨病理所見

概要

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A histopathological study of the temporal bones in three cases of occult schwannomas of the vestibular nerve is reported. Four small occult schwannomas of the vestibular nerve were discovered on routine examination of 315 serially sectioned temporal bones of 165 individuals.<BR>In the first patient who was a 67-year-old woman, the tumor arose from the left inferior division of vestibular nerve without damaging the vestibular end organs.<BR>In the second patient who was a 77-year-old man, the tumor arose from the right superior division of vestibular nerve without the damage of utricular macula.<BR>In the third patient who was a 37-year-old man, the right ear had two tumors which had a multicentric origin from inferior division of vestibular nerve and cochlear nerve with severe degeneration of cochlear nerve fibers.<BR>It is presently impossible to diagnose this entity during life, because of very small tumors and no damage of vestibular organs.
耳鼻咽喉科臨床学会の論文