肺铁末沉着症

例句：

1. 1.He was diagnosed with pneumomediastinum, which is a condition where iron deposits accumulate in the lungs.
   他被诊断出患有肺铁沉着症，这是一种肺部积聚铁质沉积的情况。
2. 2.The patient's symptoms worsened after receiving treatment for pneumomediastinum.
   患者在接受肺铁沉着症治疗后症状恶化。
3. 3. Pneumomediastinum can be caused by various factors, including smoking and exposure to certain chemicals.
   肺铁沉着症可能由多种因素引起，包括吸烟和接触某些化学物质。