Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were reviewed . The heart size is normal . There may be left hilar lymphadenopathy . Obscuration of the left heart border with a focal , almost mass - like opacity in the lingula has the suggestion of an air fluid level , concerning for cavitation . More diffuse increased interstitial markings in the left upper lobe are also present . The right lung is clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Lingula and left upper lobe opacities concerning for pneumonia . Close imaging follow up after treatment , within no more than 1 month , is recommended to document resolution .