Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Following left - sided thoracentesis , a left pleural effusion has substantially decreased in size with only a very small effusion remaining . Pleural opacity posteriorly on the lateral radiograph likely corresponds to an area of known malignant pleural thickening on recent CT torso of ___ . There is no visible pneumothorax . Improved aeration in the left lower lung . Right lung and pleural surfaces are clear . The cardiomediastinal contours are stable in appearance .
    OUTPUT:
    
Near resolution of left pleural effusion following thoracentesis , with no evidence of pneumothorax . Posterior left pleural thickening consistent with malignant pleural disease .