Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been dramatic reduction of a large left pleural effusion since recent thoracentesis . No pneumothorax is present . A small right pleural effusion is identified . Radiation changes in the right lower lobe are unchanged . A Port - A - Cath tip terminates at the cavoatrial junction . Surgical clips in the chest wall and left upper quadrant are unchanged .
    OUTPUT:
    
Only trace residual pleural effusion status post successful left thoracentesis . Small right effusion .