Neuroradiology:非酮症性高甘氨酸血症:扩散加权成像典型影像学表现

2017-09-19 shaosai MedSci原创

甘氨酸是一种神经递质,对维持脑功能正常发育有重要作用。血中甘氨酸水平异常增高可引起中枢神经系统毒性反应。导致血甘氨酸升高有两种情况,其一为伴有酮症酸中毒的高甘氨酸血症,可由丙酸和甲基丙二酸血症引起,属于有机酸血症;另一种为甘氨酸分解过程障碍,由于基因突变使酶缺陷所致,其生化改变仅有高甘氨酸血症,不出现酮症酸中毒,故称为非酮症高氨血症。本研究旨在利用扩散加权成像(DWI)甚至扩散张量成像(DTI)纤

甘氨酸是一种神经递质,对维持脑功能正常发育有重要作用。血中甘氨酸水平异常增高可引起中枢神经系统毒性反应。导致血甘氨酸升高有两种情况,其一为伴有酮症酸中毒的高甘氨酸血症,可由丙酸和甲基丙二酸血症引起,属于有机酸血症;另一种为甘氨酸分解过程障碍,由于基因突变使酶缺陷所致,其生化改变仅有高甘氨酸血症,不出现酮症酸中毒,故称为非酮症高氨血症。本研究旨在利用扩散加权成像(DWI)甚至扩散张量成像(DTI)纤维示踪技术探究非酮症高甘氨酸血症(NKH)脑病的影像学表现,并将结果发表在Neuroradiology上。本研究共纳入了7例确诊为NKH(病史8天-2年)的患者,并行颅脑MRI。所有患者均扫描了常规T1和T2WI序列,6例患者扫描了DWI,2例患者扫描了DTI和纤维示踪(4月和2年)。比较2例患者和年龄、性别相匹配的对照组的部分各向异性(FA)、轮辐扩散性(RD)、轴位扩散性和8条白质纤维的纤维束。胼胝体、上纵束和皮质脊髓束进行纤维追踪并导出各自的FA和扩散指标。在3例儿童患者中,MRI检查并未发现特异性的脑萎缩。部分萎缩出现在胼胝体萎缩。1例患者出现了小脑发育不全和幕上脑积水。在患者中,扩散

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    2018-05-31 徐岩
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    2017-10-02 zexyw01
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    2017-09-20 ylzr123

    好文.值得点赞!认真学习了.把经验应用于实践.为患者解除病痛.

    0

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    2017-09-19 131****1460

    学习了受益匪浅

    0

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