Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . The heart size is normal . The mediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . Increased lung markings in the left upper lobe are concerning for pneumonia in the correct clinical setting .
    OUTPUT:
    
Increased lung markings in the left upper lobe concerning for pneumonia .