Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is mildly enlarged . There is no significant change in the mediastinal and hilar contours . There is no significant change in the interstitial opacities . Right PICC likely terminates in mid SVC . Left - sided pacer , sternotomy wires are unchanged in position . There is no pulmonary consolidation or pneumothorax .
    OUTPUT:
    
No appreciable pneumothorax .