Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . Left hilar mass compatible with known lung cancer is relatively unchanged compared to the prior exams . Emphysematous changes are re - demonstrated with hyperinflation of the lungs . Previously seen peripheral left upper lobe nodular opacity on CT is not clearly identified on the current exam . Minimal bibasilar atelectasis is noted . No focal consolidation , pleural effusion or pneumothorax is seen . There are cholecystectomy clips in the right upper quadrant of the abdomen .
    OUTPUT:
    
Unchanged left hilar mass compatible with known malignancy . No radiographic evidence for pneumonia . Mild bibasilar atelectasis .