Desquamative interstitial pneumonitis. The intra-alveolar cells are macrophages.
D004847:Epithelial Cells; D006801:Humans; D008264:Macrophages / Q000648:ultrastructure*; D011650:Pulmonary Alveoli / Q000166:cytology / Q000473:pathology*; D011658:Pulmonary Fibrosis / Q000473:pathology*