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Longstanding Sarcoidosis Here a typical chest film in a patient with long standing Sarcoidosis (stage IV). There is fibrosis in the upper zones. The differential diagnosis includes chronic hypersensitivity pneumonitis, which also results in fibrosis with upper lobe predominance. #Clinical #Radiology #CXR #Lateral #Longstanding #Sarcoidosis #Fibrosis #RadiologyAssistant