Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view of the chest provided . There is worsening colonic distention , with ___ sign suggestive of pneumoperitoneum . Lung volumes are low , in part due to abdominal distention . Lungs are otherwise clear .
    OUTPUT:
    
Findings of pneumoperitoneum , presumably associated with recent surgery . Lungs are clear .