脱髓鞘斑块，病人患有多发性硬化症( MS )。采用磁共振（MRI）扫描可发现损害，脑脊液检测结果为免疫球蛋白 G升高，这表明电泳显示的寡克隆带与诊断是非常一致的。
Here is a demyelinated plaque in a patient with multiple sclerosis (MS). The lesions can be seen with MRI scans, but the appearance in the CSF of increased protein from IgG that demonstrates oligoclonal bands on electrophoresis is very consistent with this diagnosis.