Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is linear atelectasis in the left mid lung as well as an adjacent poorly defined opacity partially obscuring the left heart border . The lungs are otherwise well expanded and clear . No pleural abnormality is seen . Cardiomegaly is stable . The mediastinal and hilar contours are unremarkable . . Anterior cervical fusion hardware is seen .
    OUTPUT:
    
Questionable early lingular pneumonia . Short - term followup radiographs may be helpful in this regard . .