網膜色素線条症のインドシアニングリーン螢光眼底造影所見

Indocyanine green angiographic findings in angioid streaks

　網膜色素線条症24例48眼に対し，ビデオ赤外螢光眼底造影（lA）とフルオレセイン螢光眼底造影（FA）を行い比較検討し，以下の結果を得た。（1） lA後期に造影される色素線条部所見は過螢光型と低螢光型があり，過螢光型のほうが脈絡膜新生血管膜（CNM）発生が高率であった。（2）顆粒状にみえる低螢光の背景所見は本疾患に特徴的であり，CNMを合併している例に多くみられた。（3） lAは線条部や病変の拡がりを把握するうえで，FAより有用であった。

We examined 48 eyes of 24 Japanese patients with angioid streaks by indocyanine green (ICG) and fluorescein angiography. In late-phase ICG angiogram, the steaks showed either hypofluorescence or hyper-fluorescence. The incidence of choroidal neovascular membrane was higher in the latter type. Late-phase ICG angiogram also showed diffuse hypofluorescent spots which appeared to be characteristic for angioid streaks fundus. In many cases, choroidal neovascular membranes were located in areas of diffuse hypofluorescent spots. ICG angiography was more sensitive than fluorescein angiography in evaluating the extent of angioid streaks and the overall condition.