BAL of a patient shows foamy macrophages with decreased CD4: CD8 ratio. What is the diagnosis?: (A) Sarcoidosis, (B) Hypersensitivity pneumonitis, (C) Organising pneumonia, (D) Diffuse alveolar hemorrhage
Answer is C. Organising pneumonia Foamy macrophages in BAL with low CD4: CD8 ratio Hypersensitivity pneumonitis Marked lymphocytosis Sarcoidosis Marked lymphocytosis with CD4: CD8 ratio of >3.5 Diffuse alveolar hemorrhage Hemosiderin laden macrophages