Materials and Methods:Our 2 cases all had complete clinical and laboratory data as well as serial chest films and high resolution CT (HRCT) findings correlated with lung biopsy results.

• 材料与方法：本组2例均有完整的临床、实验室以及系列胸片及高分辨率CT(HRCT)检查资料，并有肺活检病理对照。