Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Comparison is made to radiograph performed 9 hr prior . There is been little interval change in overall appearance of the thorax . Two right chest tubes are noted . A right pneumothorax persists , unchanged . Pneumatosis within the right chest wall is less conspicuous . Cardiomediastinal and hilar contours are stable . Blunting of the left costophrenic angle is suggestive of a small pleural effusion .
    OUTPUT:
    
Persistent but stable right pneumothorax . Likely small left pleural effusion .