Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left pleural effusion has substantially decreased following drainage . Multiple pulmonary nodules corresponding to known metastases are unchanged . There is no appreciable pneumothorax . The heart and mediastinum are within normal limits despite the projection . An old left rib fracture has healed .
    OUTPUT:
    
Decreased left pleural effusion following drainage . No pneumothorax . Stable pulmonary metastases .