Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Known left pleural thickening with associated moderate left pleural effusion appear unchanged compared to most recent prior radiograph . The remainder of the lungs are clear . There is no pneumothorax . Cardiomediastinal and hilar contours are within normal limits .
    OUTPUT:
    
Unchanged left basilar pleural thickening and pleural fluid , moderate .