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Syndrome with characteristics of macroaneurysms of retina which may rupture causing bleeding and loss of vision, in association with supravalvular pulmonic stenosis. The disease is caused by a mutation in the IGFBP7 (insulin-like growth factor-binding protein 7) gene which is active in the vascular endothelium. The IGFBP7 gene mutation results in an abnormally short IGFBP7 protein that does not function properly.
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