Neurology:L-2-羟基戊二酸尿症所致代谢性脑白质病的影像学表现

2018-11-17 zyx整理 神经科病例撷英拾粹

9岁女孩,5岁开始隐匿性出现行走困难,反复跌倒,焦虑和学习成绩不佳。患者MRI表现(图)提示典型的L-2-羟基戊二酸尿症(L2-HGA)。然而,在Leigh综合征,3-羟基-3-甲基戊二酸尿症和琥珀酸半醛脱氢酶缺乏症中也可观察到类似改变。

9岁女孩,5岁开始隐匿性出现行走困难,反复跌倒,焦虑和学习成绩不佳。患者MRI表现(图)提示典型的L-2-羟基戊二酸尿症(L2-HGA)。然而,在Leigh综合征,3-羟基-3-甲基戊二酸尿症和琥珀酸半醛脱氢酶缺乏症中也可观察到类似改变。尿液检测分析可见L-2-羟基戊二酸水平升高,证实诊断。L2-HGA是一种罕见的常染色体隐性遗传性代谢障碍,因缺乏L-2-羟基戊二酸脱氢酶所致。其特征性MRI表现为双侧对称性基底节和齿状核受累伴皮质下白质异常。


(图:A:T2WI可见双侧对称性白质(WM)高信号[红箭],呈向心型分布,累及皮质下和深部WM,脑室周围WM不受累[白箭];B:基底节高信号[白箭]伴壳核边缘更高信号[外缘征outer rim sign,红箭];C:齿状核高信号[白箭];D:FLAIR可见脑组织稀疏[白箭])

原始出处:Sivadasan S, S V, Sundaram S. Teaching NeuroImages: Imaging in metabolic leukoencephalopathy, L-2-hydroxyglutaric aciduria. Neurology. 2018 Oct 16;91(16):e1549-e1550. 

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    2019-05-29 yinhl1978
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    2019-05-04 sodoo
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