Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Upper lobe scarring with upward retraction of the hila again noted consistent with provided history of sarcoidosis . There is no consolidation concerning for pneumonia . No large effusion or pneumothorax . Heart size is normal . Mediastinal contour stable . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Chronic upper lobe scarring likely reflective of sarcoidosis . No acute intrathoracic process .