Brown G C, Magargal L, Augsburger J J, Shields J A
Am J Ophthalmol. 1979 May;87(5):646-51. doi: 10.1016/0002-9394(79)90298-8.
A 19-year-old man had bilateral congenital preretinal arterial loops emerging from the optic disk into the vitreous cavity. The loop in the right eye was associated with an inferior papillary arterial occlusion. Extensive examination to determine a systemic cause of the occlusion was negative; twisting or kinking of the loop may have had a role. The major arterial blood supply in each eye was cilioretinal in origin and in the left eye, the inferior preretinal arterial loop supplied blood to both the retina and the choroid. In three previous cases and our case of preretinal arterial loops associated with branch retinal arterial occlusion, none had emboli or associated systemic factors. All involved solely arterial supply to the inferior retina. The ages of three of the four patients ranged from 19 to 22 years.
一名19岁男性双眼先天性视网膜前动脉环从视盘延伸至玻璃体腔。右眼的动脉环伴有下方乳头动脉闭塞。为确定闭塞的全身性病因进行的全面检查结果为阴性；动脉环的扭曲或扭结可能起了作用。每只眼睛的主要动脉血供起源于睫状视网膜动脉，在左眼，下方视网膜前动脉环为视网膜和脉络膜供血。在之前的三例以及我们这例与视网膜分支动脉闭塞相关的视网膜前动脉环病例中，均未发现栓子或相关全身性因素。所有病例均仅累及下方视网膜的动脉供血。四名患者中有三名年龄在19至22岁之间。
