両眼性糖尿病黄斑浮腫の網膜断層像の対称性

Bilateral similarity of retinal tomograph of diabetic macular edema

　両眼性糖尿病黄斑浮腫の網膜断層像の対称性を調べた。両眼に黄斑浮腫（中心窩厚200μm以上）のある糖尿病網膜症27例を対象とした。光干渉断層計（optical coherence tomography：OCT）にて網膜断層像を4群に分類し（A群：網膜膨化のみ，B群：網膜膨化＋網膜剥離，C群：嚢胞様変化，D群：嚢胞様変化＋網膜剥離），その対称性を調べた。54眼全例の網膜断層像は，A群9眼，B群7眼，C群25眼，D群13眼であった。左右の網膜断層像の型が一致したものは27例中17例（63％）で，17例の内訳は，A群2例，B群1例，C群9例，D群5例であった。D群での綱膜断層像の一致率が高かったことは，汎網膜光凝固の影響が強かったと考えられた。左右の中心窩厚は強い相関を示した（相関係数：0.72,p＜0.001）。

We evaluated the similarity/dissimilarity of diabetic macular edema between both eyes in 27 patients. The macular edema was assessed by using an optical coherence tomography (OCT). All the eyes had foveal thickness of more than 200,um. The 54 eyes in the series were categorized into four groups based on the OCT finding. Group A:9 eyes with retinal swelling. Group B:7 eyes with retinal swelling and serous retinal detachment. Group C:25 eyes with macular cyst. Group D:13 eyes with macular cyst and serous retinal detachment. Macular edema was similar in 17 of 27 pairs of eyes (63%). Both eyes had macular edema of group A in 2 patients, group B in one, group C in 9, and group D in 5. Prior panretinal photocoagulation appeared to be a chief factor of bilateral similarity in group D. There was a significant correlation in the foveal thickness in both eyes (correlation coefficient:0.72, p ＜ 0.001) .