Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate interval development of a large predominantly gas - containing hydropneumothorax . No right - sided effusion or pneumothorax evident . Lungs are clear . Cardiomediastinal and hilar contours are unremarkable . New ICD lines are well positioned and continuous .
    OUTPUT:
    
New large left hydropneumothorax , predominantly gas . Well - positioned lines . ___ discussed these findings with interventional pulmonary fellow , at 10 :30 a .m . on ___ at time of interpretation .