放射線療法が奏効した大型の脈絡膜血管腫の症例

Radiotherapy was effective in a case of giant choroidal hemangioma

　症例は23歳の男性で右顔面にSturge-Weber症候群の血管腫があり，右眼視神経乳頭耳側に黄斑部を含む約7乳頭径の大型の脈絡膜血管腫を認め，下方周辺部に胞状の続発性網膜剥離が存在した。レーザー光凝固，インターフェロン全身療法，網膜下液排液などの治療は無効であった。低線量の放射線外照射（計22Gy）を行ったところ，放射線療法終了後から眼底所見は著明に改善し，5か月後には腫瘍は扁平化し，網膜剥離は消失して網膜は復位した。難治の脈絡膜血管腫に対して低線量放射線外照射が有効な症例を経験した。

A 23-year-old male presented with a large choroidal hemangioma in his right eye associated with ipsilateral Sturge-Weber syndrome. The hemangioma was 7 disc diameters in size and was located temporal to the disc involving the macula. Bullous retinal detachment was present in the inferior fundus. The lesion persisted after laser photocoagulation, systemic interferon and surgical drainage of subretinal fluid. Remarkable improve-ment set in after low-dose external radiation totalling 22 Gy. The hemangioma became flat and the retina become reattached 5 months later. This case illustrates the effectiveness of low-dose radiation for recalcitrant choroidal hemangioma.