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(26B1-13) 特発性脈絡膜新生血管20眼に対してインドシアニングリーン(indocyanine green:ICG)螢光造影を行った。年齢は29歳から49歳,平均40歳であった。17眼に脈絡膜新生血管(choroidalneovascuiarization:CNV)が検出され,これを囲む低螢光は造影後期で全症例にみられた。CNVが乳頭面積の1/2以上である10眼中7眼で検眼鏡的に色素沈着があり,ICG螢光造影では10眼すべてにCNVがある領域の内部が低螢光を示した。CNV以外の部位の脈絡膜の異常は11眼55%にあった。以上のICG螢光造影所見は,CNVが網膜下にあることを示し,加齢黄斑変性との鑑別に有用である。脈絡膜の異常がCNVの発生と因果関係がある可能性がある。
We performed indocyanine green (ICG) angiography in 20 eyes of idiopathic choroidal neovascularization. The patients were aged between 29 and 49 years, average 40 years. Choroidal neovascularization (CNV), was detected in 17 eyes. All the 20 eyes showed a dark rim around the lesion. Out of 10 eyes with CNV larger than one half of disc area, ophthalmoscopy showed subretinal pigmented halo or plaque in 7 eyes and ICG angiography showed a dark halo or plaque within the area of CNV in all the eyes. Abnormalities of the choroid in areas other than the CNV were found in 11 eyes, 55%. These findings seemed to show that the CNV is located posterior to sensory retina and that the ICG findings can be useful in differentiating from age-related macular degeneration. There is a possibility that the choroidal abnormality is pathogenetically related to CNV.
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