頸静脈孔神経鞘腫の1例—特に症候診断学的考察

Intracranial Neurinoma of Jugular Fotarnen:Report of a Case and Reference, its Clinical Manifestations

Ⅰ．緒言

　神経鞘腫が頭蓋内下部脳神経から単独発生するのは非常にまれであり，しかも石山ら^5）によると頭蓋内Ⅸ，Ⅹ, Ⅺ脳神経より発生した神経鞘腫は本非邦で2例，世界で27例しか報告されていない．

　最近，我々は左jugular foramenから発生したと思われる神経鞘腫で後方はcisterna magnaへ伸展し，下方はforamen magnumを越えて第1頸椎上縁まで達しforamen magnum tumorのcraniospinal typeを呈した症例を経験したのでここに若干の文献的考察を加えて報告する．

This is the 28th case report of jugular foramen neurinoma in the world.

A 24-year-old man was admitted to our hospital with complaints of dizziness and impaired balance.

Neurological examination revealed IX, XI and XII cranial nerves and cerebellar involvements, e. g., Brun's Cushing nystagmus, curtain sign on the left, weakness of the left sternocleidomastoid muscle and deviation of the tongue to the left, accompanied with atrophy. Choked discs and other signs of increased intracranial pressure were not recognized.

There were no cerebellar symptoms except Unpaired balance and nystagmus.