Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again noted is an opacity in the left upper lobe and left perihilar region compatible with known malignancy . Heart size is normal . Mediastinal contour is unchanged , and the right hilar contour is unremarkable . Remainder of the lungs are clear . No new pleural effusion or pneumothorax is present . No pulmonary edema is visualized .
    OUTPUT:
    
Unchanged left upper lobe and left perihilar opacity compatible with known malignancy . No new areas of focal consolidation identified .