Results: In the sural nerve biopsy, the most striking abnormality was the presence of axonal degeneration (axons become fine and breakdown),but the myelin sheath and schwann cells were norman.

• 结果：常规染色与神经特染的镜下主要特点为腓肠神经的轴索变性而髓鞘和许旺氏细胞相对保持完整，免疫组化结果显示轴索中神经丝蛋白明显减少，残留的神经丝呈细丝状或断裂状。