IPF最显著的病理特征是成纤维细胞灶的存在。
The most notable characteristic feature of IPF is presence of fibroblastic foci.
镜下，脓肿灶内有大量炎细胞，但脓肿壁由毛细血管和成纤维细胞组成。
Microscopically, the abscess has a mixture of inflammatory cells, but the wall of the abscess is "organizing" with ingrowth of capillaries and fibroblasts.
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