（三）肾小血管病变常见以下几种类型；①高血压引起的血管病变常见；②小叶间动脉及出入球小动脉呈内皮细胞肿胀、破坏，血管内血栓，I<sub>g</sub>G及C3</sub>沉积于血管壁，无炎症反应；③坏死性小血管炎，抗中性粒细胞胞浆抗体（ANCA）阳性；④肾脏血栓微血管病（renalthromboticmicroangiopathy），在无坏死的基础上出现肾小动脉及间质毛细血管血栓，继而发展为肾小球硬化。
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