"Ivy sign" on fluid-attenuated inversion-recovery images in childhood moyamoya disease.
"Ivy sign" on fluid-attenuated inversion-recovery images in childhood moyamoya disease.
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发表时间：
1999-11
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通讯作者：
M. Maeda;Chika Tsuchida
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作者：
M. Maeda;Chika Tsuchida
我们报告一名患有烟雾病的15岁女孩的MR研究，该女孩通过液体衰减反转恢复（FLAIR）和对比增强成像显示弥漫性轻脑膜增强（“常春藤征”）。我们推测，这种增强背后的机制是由经小脑膜吻合的充血的头血管逆行缓慢流动引起的。然而，目前尚不清楚FLAIR图像上高信号的确切来源是由于脑脊膜本身还是由于脑脊膜充血增厚，还是两者兼而有之。
We report on MR studies of a 15-year-old girl with moyamoya disease in whom diffuse leptomeningeal enhancement ("ivy sign") was revealed by fluid-attenuated inversion-recovery (FLAIR) and contrast-enhanced imaging. We speculate that the mechanism behind this enhancement is caused by a retrograde slow flow of engorged pial vasculature via leptomeningeal anastomosis. Nevertheless, it remains unknown whether the precise source of a high signal on FLAIR images is attributable to pial vessels themselves or congested thickening of the leptomeninges or both.