Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate left pleural effusion with adjacent compressive atelectasis , increased in size from the prior CT . The effusion obscures the known mass in ground - glass opacities in the left lower lung demonstrated on prior CT . Increased asymmetric opacity in the left perihilar region is concerning for lymphangitic tumor spread in the setting of the known mass and less likely reflects pneumonia or a component of edema . The heart is probably mildly enlarged . The mediastinum is not widened . Opacity in the left upper lobe and right upper lobe on prior CT are not readily apparent on radiograph today . No pneumothorax . Aortic knob calcifications are noted . Degenerative changes of thoracic spine are unchanged .
    OUTPUT:
    
Interval increase in moderate left pleural effusion atelectasis with increased left perihilar opacity concerning for lymphangitic spread .