Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unchanged . The heart size is within normal limits . Opacity within the left mid lung field with associated rib destruction is unchanged , compatible with known chest wall mass as delineated on the previous CT . Severe emphysematous changes are again demonstrated . Scarring within the right upper lobe is unchanged . The pulmonary vasculature is normal . No pleural effusion or pneumothorax is identified . No subdiaphragmatic air identified .
    OUTPUT:
    
No interval change from prior . Re - demonstration of left chest wall mass with severe emphysema . No areas of pneumonia identified and no free intraperitoneal air seen .