Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size appears top normal . Cardiomediastinal contours are unremarkable . There is a small left - sided pleural effusion with minimal blunting of the left costophrenic angle . Lungs are otherwise clear with no evidence of focal infiltrates . No pneumothorax . Bony structures are within normal limits for age .
    OUTPUT:
    
Small left - sided pleural effusion .