Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . The lungs are hyperinflated . There is a vague opacity in the left mid lung which could represent an early pneumonia . Also a retrocardiac opacity seen on the frontal view is not corroborated on the lateral view . Cardiomediastinal silhouette is stable . Bony structures appear intact .
    OUTPUT:
    
Vague opacity in the left mid lung could represent pneumonia . Followup to resolution . Hyperinflated lungs again noted .