眼窩血管腫の2摘出例

Two cases of surgically removed cavernous hemangioma of the orbit

　35歳男性で急速に眼球突出をきたした巨大眼窩血管腫の症例（症例1）と65歳女性で下眼瞼に腫瘤を自覚しながらも放置していた眼窩血管腫の症例（症例2）の計2例について報告した。腫瘍は2例とも全摘出し，病理組織所見はともに海綿状血管腫であった。急速な眼球突出の増強の原因は腫瘍内の出血のためであった。症例1の場合，腫瘍は巨大であったが，眼窩外側に位置し，術前の視力，視野は良好であった。他方，症例2では腫瘍は小さかったが，眼窩内側にあり，術前の視野検査に異常がみられ，術後正常となった。以上のことから，眼窩腫瘍において，腫瘍の大きさより位置のほうが視機能に及ぼす影響が大きいと思われた。

We observed hemangioma of the orbit in a male and female aged 35 and 65 years respectively. The first case was characterized by rapid progression of proptosis, apparently due to hemorrhage within the tumor mass. The hemangioma could be totally removed by surgery. Histopathologically, the lesion was cavernous hemangioma in both cases. The first case showed intact visual acuity and visual field, due presumably to the location of the tumor temporal to the orbital tissue. The second case showed small tumor size but showed visual field impairment due to its location nasal to the orbital tissue. These features seemed to show that visual functions are more severely affected by the location of the tumor rather than its actual size.