Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Hila appear congested . There is trace fluid along fissural surfaces . Heart is within normal limits of size . Aortic knob calcifications again noted . Asymmetric left perihilar opacity raises potential concern for a superimposed pneumonia . No large effusion or pneumothorax . Bony structures are intact .
    OUTPUT:
    
Hilar congestion with trace pleural fluid . Left perihilar asymmetric opacity raises potential concern for a subtle pneumonia .