Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Lung volumes are low . There is left perihilar opacity , which is new and worrisome for pneumonia . No definite pleural effusion or pneumothorax . Heart size appears stable . Previously noted PICC line has been removed . Bony structures are intact .
    OUTPUT:
    
Left perihilar opacity concerning for pneumonia .