Fig. 2.

Histological findings of lung biopsy specimens taken at bronchoscopy.

Although hematoxylin-eosin staining (2A) and Elastica van Gieson staining (2B) fail to show the iron accumulation, macrophages containing cytoplasmic iron pigment are identified by the Prussian Blue staining (2C). (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)