中枢神经系统的肿瘤是难治性癫痫的一个重要病因。国内外研究发现,这类肿瘤大部分是一些低级别脑胶质瘤,主要位于皮质,生长缓慢,除慢性癫痫外,没有神经系统损害的症状和体征,从癫痫发作到确诊为肿瘤的时间往往需要数年或数十年。低级别胶质瘤的临床特点主要表现为癫痫发作,部分是难治性的。低级别胶质瘤引起癫痫的原因并不是肿瘤本身单一因素所致,而是由于脑肿瘤的压迫和 Central nervous system tumors are an important cause of refractory epilepsy. Domestic and foreign studies have found that most of these tumors are low-grade gliomas, mainly located in the cortex, slow growth, in addition to chronic epilepsy, there is no signs and symptoms of nervous system damage, from seizures to diagnose the time of the tumor often It can take years or decades. The clinical features of low-grade gliomas mainly manifest as seizures, and some are refractory. Low-grade glioma causes epilepsy is not caused by the tumor itself a single factor, but because of oppression of brain tumors and