Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded . There is a wedge - shaped opacity in the left upper lobe with less dense opacity more diffusely involving the left upper lobe , with evidence of volume loss . There is a horizontal scar consistent with prior resection . There is extension of the left hilum compared to prior studies . There is no pneumothorax . There is no pleural effusion . Pulmonary vascularity is normal .
    OUTPUT:
    
Left upper lobe opacities likely secondary to infection superimposed on known worrisome spiculated nodule seen on the prior CT . Continued followup will be necessary after treatment for infection .