47.The focal nature of granulomatous inflammation is demonstrated in this microscopic section of lung in which there are scattered granulomas in the parenchyma. This is why the chest radiograph with tuberculosis or other granulomatous diseases is often described as "reticulonodular"A biopsy could miss such lesions from sampling error, too.

47.镜下部分肺组织表明肉芽肿性炎的局部特征，软组织里几个分散的肉芽肿。这是结核病或其它肉芽肿病胸透下表现为散在结节的原因。活检会因取材不当而漏诊。