常见的病理表现包括坏死、肉芽肿和血管炎，但三者同时存在率低，不同的活检部位阳性率差别大。

The most common pathologic features were necrosis, granuloma and vasculitis, but the concurrence of a triad was less, and the positive rates of different biopsy parts were varied.

youdao

常见的病理表现包括坏死、肉芽肿和血管炎，但三者同时存在率低，不同的活检部位阳性率差别大。

The most common pathologic features were necrosis, granuloma and vasculitis, but the concurrence of a triad was less, and the positive rates of different biopsy parts were varied.

youdao