黄斑前膜の自然消失例の観察

Cases of spontaneous separation of epiretinal membrane

要約　目的：黄斑前膜の自然消失例5例の報告。症例：症例は5例5眼。平均年齢は57.4±4.21歳。男性1例，女性4例の黄斑前膜の症例である。所見：黄斑前膜を認めた時点で垂直方向の硝子体皮質の牽引所見があったのは2例，完全な後部硝子体剝離（PVD）を認めた症例は1例であった。1例は続発性でその他は特発性であった。視力は0.4～1.2であった。黄斑前膜消失までの期間は6～35か月（平均19か月）。黄斑前膜消失時の視力は0.5～1.2であった。4例にPVDに伴った黄斑前膜の消失を認めた。結論：PVDのない黄斑前膜に関しては自然消失の可能性があり，これを留意した治療計画をすべきと思われた。

Abstract.　Purpose：To report five cases who showed spontaneous separation of epiretinal membrane. Cases：This retrospective study was made on 5 eyes of 5 patients. The series comprised 1 male and 4 females. Their age ranged from 51 to 62 years, average 57 years. Anteroposterior vitreal traction was initially present in 2 eyes. One eye showed complete detachment of posterior vitreous membrane. Foveal thickness, when measured by an optical coherence tomography（OCT）, averaged 273.3＋79.2μm. Corrected visual acuity ranged from 0.4 to 1.2. Clinical Course：The epiretinal membrane disappeared spontaneously in all the 5 eyes after 6 to 35 months, average 19 months with visual acuity ranging from 0.5 to 1.2. Foveal thickness averaged 183.4±15.9μm. Disappearance of epiretinal membrane was secondary to posterior vitreous detachment. Conclusion：Epiretinal membrane may spontaneously disappear in eyes without posterior vitreous membrane. This possibility has to be kept in mind in planning therapeutic alternatives.