Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are stable . The left - sided chest tube has been removed without appreciable pneumothorax . Right basilar atelectasis and small right pleural effusion are worse and left basilar atelectasis is improved from prior examination . Intact sternotomy wires and replaced mitral valve are unchanged in appearance .
    OUTPUT:
    
Interval removal of the left - sided chest tube without appreciable pneumothorax .