Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased ill - defined opacity in the left lung base , which likely reflects increased moderate left pleural effusion . Increased retrocardiac opacity in the left lung base is likely atelectasis related to extubation . There is no pneumothorax . ET tube , NG tube and mediastinal drains have been removed . Cardiomediastinal silhouette has normal postop appearance . Right jugular Swan - Ganz catheter is in unchanged position and terminates at proximal right pulmonary artery . Sternotomy wires are intact .
    OUTPUT:
    
Moderate left pleural effusion is increased from ___ . There is atelectasis of left lung base . No pneumothorax .