Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Stable post CABG changes . No features of cardiac decompensation . No airspace consolidation . No suspicious pulmonary nodules or masses . Interval decrease in size of left - sided pleural effusion . No pneumothorax . Spondylotic changes of the thoracic spine . Mild background of pulmonary hyperinflation .
    OUTPUT:
    
Interval decrease in size of left - sided effusion . No pneumothorax .