Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Diffuse hazy opacities predominantly involving the upper and mid lungs correspond with ground - glass opacities seen on concurrent chest CT and are consistent with a history of underlying pulmonary sarcoidosis . More linear fibrosis is noted in the right upper lung . No confluent consolidation is identified . There is no pleural effusion . No pneumothorax is identified . The thoracic aorta remains tortuous . The mediastinal contours are within normal limits . Mild enlargement of the bilateral hila are consistent with known lymphadenopathy . The heart size is normal .
    OUTPUT:
    
Progressive fibrosis due to pulmonary sarcoidosis without superimposed acute cardiopulmonary process .