脑部病变是在脑部成像检查（磁共振成像（MRI）或计算机断层成像（CT））中看到的异常。在 CT 或 MRI 扫描中，脑部病变表现为看起来不像正常脑组织的暗点或亮点。
一般情况下，脑部病变是偶然被发现，与最初需要做影像学检查的状况或症状无关。
脑部病变可能涉及大脑区域的一小部分或者大部分，潜在疾病的严重程度可能相对较小，也可能危及生命。
如果在脑成像检查期间发现的脑病变似乎并非来自良性或已愈状况，医生可能会进行额外检查或咨询专科医生，以寻求更多信息。
您的医生可能建议您应去看神经科医生，接受专科检查以及可能接受进一步检查。即使神经系统检查并未得出诊断结果，您的医生也可能建议继续接受检查以实现诊断，或定期随访进行影像学检查以监测脑病变。
显示参考文献
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Original article: https://www.mayoclinic.org/zh-hans/symptoms/brain-lesions/basics/when-to-see-doctor/sym-20050692