網膜静脈分枝閉塞症に伴うびまん性黄斑浮腫に対して硝子体手術を行った2例

Vitreous surgery in two eyes with diffuse macular edema secondary to branch retinal vein occlusion

　網膜静脈分枝閉塞症に起因し，黄斑上に肥厚した後部硝子体膜を伴うびまん性黄斑浮腫2例2眼に対して黄斑浮腫の軽減を目的に硝子体手術を行った。術中，肥厚した後部硝子体膜の黄斑部網膜への癒着がみられ，人工的に後部硝子体剥離を作成した。術後，黄斑浮腫および網膜出血は減少し，螢光眼底造影では螢光漏出の減少を認め，有意な視力向上を得た。糖尿病黄斑浮腫と同様に網膜静脈分枝閉塞症でも，硝子体手術で黄斑上を覆う後部硝子体膜を除去することによって黄斑浮腫が改善する可能性が示唆された。

We treated two eyes with diffuse macular edema with thick epimacular vitreous membrane secondary to branch retinal vein occlusion. During vitreous surgery, the vitreous membrane had to be separated from the macular surface. Macular edema and retinal hemorrhage decreased following surgery. Fluorescein angiography showed reduced dye leakage from the affected vessels. The visual acuity improved significantly. These cases illustrates the possibility that diffuse macular edema secondary to branch retinal vein occlusion can be successfully treated by surgical removal of the epimacular vitreous membrane.