Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again demonstrated is extensive subcutaneous emphysema , more so within the left chest wall and neck compared to the right , as well as pneumomediastinum and a moderate size left basal lateral hydropneumothorax , all of which appear similar in size and extent compared with the most recent prior chest radiograph with the exception of the pneumomediastinum which appears improved . Heart size remains within normal limits . Mediastinal and hilar contours are unchanged with similar slight rightward shift of the mediastinal structures . The pulmonary vasculature is not engorged . Chain sutures are seen within the left perihilar region compatible with history of prior wedge resection . Lungs are hyperinflated with marked emphysematous changes re - demonstrated . Streaky bibasilar airspace opacities are more pronounced in the interval , and may reflect aspiration or infection . Scarring in the right hilus is unchanged . No acute osseous abnormality is visualized .
    OUTPUT:
    
1 . Streaky bibasilar airspace opacities are new in the interval , concerning for aspiration or infection . 2 . Interval improvement in extent of pneumomediastinum . Similar degree of extensive subcutaneous emphysema , and moderate size left basal lateral hydro pneumothorax . 3 . Emphysema .