Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the 11 :51 a .m . examination there has been interval near - complete drainage of a large left pleural effusion . No underlying consolidation is seen . The heart is moderately enlarged . There is no pneumothorax . Mild interstitial edema is unchanged . A small right pleural effusions is present .
    OUTPUT:
    
Post drainage of large left pleural effusion . No pneumothorax .