Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased opacity in the right upper lung with air bronchograms is concerning for pneumonia . The left lung is clear aside from left basilar atelecatsis . The known right upper lobe mass is again seen . Heart size is normal . Mediastinal silhouette and hilar contours are normal . There is no free air under the diaphragm . Sternotomy wires and mediastinal clips are noted . Radioopaque foreign bodies project over the right mid lung .
    OUTPUT:
    
Right upper lobe opacity is likely pneumonia , possibly post obstructive in the setting of known right upper lobe mass .