（4）抗中性粒细胞胞浆抗体（ANCA）：ANCA是近年研究较多的自身抗体之一，ANCA主要有两个亚型，即抗蛋白酶3（PR3）抗体，称为胞浆型ANCA（C-ANCA）和抗髓过氧化物酶（MPO）抗体，称为核周型ANCA（P-ANCA）。
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