Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ and the insertion of a right pigtail pleural drain , the previously large right pleural effusion has become very small . There is no pneumothorax . Moderate left sided pleural effusion slightly increased . New left perihilar opacification is asymmetric edema or pneumonia . The mediastinal contours are stable in appearance .
    OUTPUT:
    
Successful drainage right pleural effusion post pigtail catheter without pneumothorax . Increasing moderate left effusion and left asymmetric pulmonary edema or pneumonia .