Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is complete opacification of the left hemi thorax secondary to massive pleural effusion with rightward shift of the mediastinum . There is also a small effusion on the right . The right lung is grossly clear . Cardiac silhouette can not be assessed on this study . No pneumothorax is present . Surgical clips project over the left mediastinum .
    OUTPUT:
    
Complete opacification of the left hemi thorax due to massive left pleural effusion . Small right pleural effusion .