亮白色可极化晶体，但都在血管内呈弥漫和集中分布。这是一个长期静脉内用药的病人的肺。仅有大约1%的这种病人出现明显的肺纤维化。晶体代表滑石，滑石用来稀释注射的药物。
Bright white collections of polarizable crystals are seen here, but are diffuse and centered around vascular spaces. This is the lung of a patient with a long history of intravenous drug use. Only about 1% of such persons get a significant degree of pulmonary fibrosis. The crystals represent talc that is used to to dilute the injected drug.
