Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Midline sternotomy wires are noted . There is right hilar opacity which may be related to reported history of lung cancer . Volume loss in the right lung may reflect prior resection or radiation related changes . Left lung is clear . No convincing evidence for pneumonia , edema , large effusion or pneumothorax . The heart and mediastinal contours are normal . Bony structures are intact .
    OUTPUT:
    
Right hilar opacity concerning for malignancy in this patient with history of lung cancer . Please correlate with prior imaging as interval changes difficult to exclude in the absence of recent prior comparison .