Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Surgical clips are noted projecting over the midline of the low chest . There is left upper lung irregular opacity and left apical pleural cap which could relate to and old infection / scarring / injury . Please correlate clinically and with prior imaging studies if available . There is emphysema without definite signs of a superimposed pneumonia . No large effusion or pneumothorax . The heart is mildly enlarged . The mediastinal contour is grossly within normal limits . The bony structures appear demineralized though intact .
    OUTPUT:
    
Irregular left upper lobe opacity and left apical pleural cap , which could reflect old injury / infection . Please correlate clinically . Emphysema , mild cardiomegaly .