卵黄様黄斑変性のOCT像

Optical coherence tomographic features of vitelliform macular dystrophy

　卵黄様黄斑変性の2例4眼の断層像を光学的干渉断層計で検索した。卵黄期では，網膜色素上皮と脈絡毛細管板を示す高反射帯が紡錘形の肥厚として観察された。炒り卵期では，網膜下に2層の高反射帯があった。下方の高反射帯は網膜色素上皮と脈絡毛細管板の高反射帯に連続していた。卵黄期のOCT所見からは，網膜下の物質貯留，色素上皮自体の肥厚，または色素上皮下での物質貯留の可能性が考えられた。炒り卵期では網膜下の物質貯留の可能性が示唆された。

Optical coherence tomography (OCT) was performed on 4 eyes with vitelliform macular dystrophy. In eyes with vitelliform stage showed a highly reflective fusiform thickening of the layer at the level of the retinal pigment epithelium (RPE) and choriocapillaris. The vitelliform lesion lacked background fluorescence due to blocking when seen on fluorescein angiography. In eyes with scrambled egg lesin, OCT showed two highly reflective zones posterior to the sensory retina. A flat dome-shaped space was present between the two reflective zones. The anterior zone was in apposition to the sensory retina. The posterior zone was presented at the level of the RPE and the choriocapillaris. The area of accumulated yellow material showed window defect on fluorescein angiogram. The findings showed the yellow material to have accumulated within the RPE epithelium in the vitelliform stage. The material was also located in the subretinal space in the scrambled egg stage.