患者女,10岁。因“反复抽搐1年”入院,近半年来发作频率增加。神经系统检查:神志清,双瞳等大等圆,光反射存在,四肢肌力Ⅴ级,肌张力无异常,病理征阴性。实验室检查:神经特异性烯醇化酶16.68 ng/ml。CT检查:左侧额叶可见楔形低密度灶,CT值约13~36 HU,边界尚清,邻近颅骨未见骨质破坏(图1)。MRI检查:左侧额叶皮层及皮层下可见斑块状长T1、长T2信号,FLAIR示病灶边缘环形高信号,内 Female patient, 10 years old. Because of “repeated convulsions 1 year ” admission, seizure frequency increased in the past six months. Nervous system examination: clear mind, double pupil and other large circle, light reflex exists, limb muscle strength Ⅴ level, no abnormal muscle tone, pathology sign negative. Laboratory tests: Neuron specific enolase 16.68 ng / ml. CT examination showed that the frontal lobe of the left wedge low density lesions, CT value of about 13 ~ 36 HU, the border is clear, no bone destruction adjacent to the skull (Figure 1). MRI examination: plaque-like long T1 and long T2 signals were seen in the left frontal cortex and cortex, while FLAIR showed ring-shaped high signal in the lesion