Gurwood A S, Bailey J T, Pelino C J
Pennsylvania College of Optometry, Philadelphia 19141,USA.
Optometry. 2001 Sep;72(9):597-602.
A 24-year-old woman with symptoms of chronic, recurrent headache, presumably secondary to migrainous etiology, came to our clinic and was found to have a congenital retinal macrovessel encircling an area superior to (but not passing through) the macula.
Congenital retinal macrovessels are rare, aberrantly large branches of retinal arteries or veins that typically cross the horizontal raphe to either supply or drain the macular area. These unusual vascular entities must be distinguished from prepapillary vascular loops, racemose hemangiomas, Wyburn-Mason syndrome, or other arteriovenous malformations with potential neuro-ocular sequelae.
一名24岁女性，有慢性复发性头痛症状，推测继发于偏头痛病因，前来我院就诊，被发现有一条先天性视网膜大血管环绕黄斑上方区域（但未穿过黄斑）。
先天性视网膜大血管罕见，是视网膜动脉或静脉异常粗大的分支，通常穿过水平中纬线以供应或引流黄斑区。这些异常的血管结构必须与视乳头前血管襻、蔓状血管瘤、怀伯恩-梅森综合征或其他有潜在神经眼科后遗症的动静脉畸形相鉴别。
