Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left port tip is in low SVC . Interval increase in moderate - sized left pleural effusion . Clear lungs bilaterally without pneumothorax or right pleural effusion . Heart size is partially obscured by the pleural effusion , however mediastinal contour and hila are normal . No bony abnormality .
    OUTPUT:
    
Interval increase in moderate - sized left pleural effusion .