交代性Horner症候群

Alternating Horner syndrome

I．はじめに

　Horner症候群^1）は，瞳孔，限瞼，顔面への交感神経支配の麻痺によって生じる。視床下部にある中枢から脳幹，脊髄，頸部交感神経節およびそれより末梢に及ぶその経路のどの部位が障害されても，障害側に本症候群がみられることはよく知られている。

　Horner症候群の診断は通常左右を比較して行なわれて片側性のことが多いが，まれに両側性のこともある。

Abstract

　Horner syndrome is due to ipsilateral sympathetic nerve interruption to the eye and face. Although it is usually unilaterally, and rarely bilaterally, observed, Horner syndrome may alternate from one side to the other. This phenomenon is called alternating Horner syndrome.

　Reported cases of alternating Horner syndrome in the literature were reviewed and the pathogenesis and the mechanism of the phenomenon were discussed.

　Thirtyone cases were recorded in the literature.