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首页> 外文期刊>Pediatric neurology >Magnetic resonance imaging in occipital lobe epilepsy with frequent seizures.
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Magnetic resonance imaging in occipital lobe epilepsy with frequent seizures.

机译：枕叶癫痫发作频繁的磁共振成像。

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摘要

Magnetic resonance imaging and single-photon emission computed tomography provide useful information in the evaluation of the pathophysiology of epileptic foci. Ictal magnetic resonance imaging in a 7-year-old male with occipital lobe epilepsy revealed mild swelling of the left temporo-occipital region, with hyperintensity on T(2)-weighted and fluid attenuated inversion recovery images. This lesion, however, was not detected on diffusion-weighted imaging. An ictal single-photon emission computed tomography study using 99mTc-ECD demonstrated left temporo-occipital hyperperfusion. T(2)-weighted and fluid attenuated inversion recovery images revealed hyperintensity without atrophy 4 months after control of his seizures. The focus in nonconvulsive status epilepticus has been reported as showing hyperintensity on T(2)-weighted, fluid attenuated inversion recovery and diffusion-weighted images. Since hyperintensity on diffusion-weighted imaging reflects cytotoxic intracellular edema due to excitotoxicity, and his ictal diffusion-weighted image exhibited no remarkable change, the lesions in the left temporo-occipital region resulted from vasogenic edema. Cytotoxic edema resulting from excitotoxicity leads to neuronal death, causing cortical atrophy. Thus, diffusion-weighted imaging is a useful tool to predict the prognosis of frequent seizures.
机译：磁共振成像和单光子发射计算机断层扫描为癫痫病灶的病理生理学评估提供了有用的信息。 Ictal磁共振成像在枕叶癫痫的7岁男性中发现左侧颞枕区域轻度肿胀，在T（2）加权和液体衰减的反转恢复图像上出现高强度。但是，在弥散加权成像中未检测到该病变。一项使用99mTc-ECD的单眼单光子发射计算机断层扫描研究表明，左颞枕过度灌注。 T（2）加权和液体衰减的反转恢复图像显示，在控制癫痫发作4个月后出现高强度而无萎缩。据报道，非惊厥性癫痫持续状态的重点是在T（2）加权，液体衰减的反转恢复和弥散加权图像上显示高强度。由于扩散加权成像的高强度反映了由于兴奋性毒性引起的细胞毒性细胞内水肿，而他的发作期扩散加权图像未显示出明显变化，因此左颞枕区域的病变是由血管性水肿引起的。兴奋性毒性引起的细胞毒性水肿导致神经元死亡，导致皮质萎缩。因此，弥散加权成像是预测频繁发作的预后的有用工具。

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