Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . A triangular opacity projecting over the lower anterior thorax on the lateral view is suggestive of partial opacification of the right middle lobe , although quite possibly due to atelectasis . A very vague opacity with peribronchial cuffing , however , projects over the left mid lung , probably referring to the lingular region and concerning for incipient pneumonia . Bony structures are unremarkable .
    OUTPUT:
    
Vague asymmetric opacification of the left mid lung , concerning for developing pneumonia within the lingula . Correlation with physical findings and symptoms is recommended . Short - term follow - up chest radiographs may be helpful to assess further if clinically indicated .