Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . There is increasing opacity in the left mid and lower lung which may represent worsening effusion . Right lung remains relatively clear and hyperinflated with lucent upper lung . Heart size can not be assessed . Mediastinal contour is unchanged . Bony structures appear grossly intact .
    OUTPUT:
    
Increased opacity in the left mid to lower lung is concerning for worsening effusion .