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要約 目的:網膜色素変性症に合併する黄斑円孔2症例を硝子体手術で治療したので報告する。
症例1:64歳,男性。右眼視力低下にて近医より紹介。右視力は0.05(0.1)。眼底には両眼とも周辺部に骨小体様色素沈着所見を認め,自発蛍光眼底検査では全周性に蛍光の乏しい斑状所見を認めた。Goldmann視野検査では両眼とも求心性視野狭窄を認めた。網膜電図(ERG)では両眼とも消失していた。光干渉断層計(OCT)所見では右眼に黄斑円孔(直径578μm)を認めた。Phacovitrectomyをhead-up surgery systemを用いて行った。Modified inverted ILM flap-techniqueを施行し,SF6を注入した。術後6か月で円孔の閉鎖を認め,視力は(0.5)に改善した。
症例2:43歳,女性。左眼視力低下にて近医より紹介。左視力は0.3(0.4)であった。眼底は両眼とも黄斑部以外の骨小体様色素沈着を認めた。自発蛍光眼底検査では,網膜全周に斑状色素脱失斑を認めた。Goldmann視野検査では両眼とも求心性視野狭窄および斑状視野欠損を認めた。ERGでは両眼とも消失していた。OCT所見では右眼に黄斑円孔(直径284μm)を認め,左眼phacovitrectomyを行った。ILMを剝離し,SF6を注入した。術後6か月の左視力は(0.8)と改善し,OCTにて円孔の閉鎖を認めた。
結論:網膜色素変性症に対する光毒性を軽減するためhead-up surgery systemは有用であり,難治と考えられるものではmodified inverted ILM flap-techniqueが奏効すると考えた。
Abstract Objective:We report two cases of macular hole associated with retinitis pigmentosa treated by vitrectomy.
Case 1:A 64-year-old man was referred by his local physician due to vision loss in the right eye. Right visual acuity was 0.05(0.1). Bone spicule pigmentation in the periphery of the fundus was observed in both eyes. Goldmann's visual field showed concentric contraction in both eyes. The erectroretino graphy(ERG)was flat in both eyes. Optical coherence tomography(OCT)findings showed a large macular hole(578 μm diameter)in the right eye. Phacovitrectomy using a head-up surgery system and modified inverted internal limiting membrane(ILM)flap-technique were performed, and SF6 was injected. Six months after surgery, the macular hole was closed and visual acuity improved to 0.5.
Case 2:A 43-year-old woman was referred by her local physician due to decreased vision in the left eye. Left visual acuity was 0.3(0.4). The fundus showed osteoid pigmentation in both eyes except in the macular area. Goldmann's visual fields showed afferent visual field stenosis and mottled visual field defects in both eyes. The ERG was flat in both eyes. OCT showed a macular hole(284 μm diameter)in the right eye, and phacovitrectomy was performed in the left eye. The ILM was stripped, and SF6 was injected. Six months after the surgery, left visual acuity improved to 0.8, and OCT showed closure of the foramen magnum.
Conclusion:The head-up surgery system is useful for reducing phototoxicity in retinitis pigmentosa, and the modified inverted ILM flap-technique is effective in refractory cases.
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