Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Persistent small left apical pneumothorax . No evidence of tension . The patient is rotated . The left - sided chest tube is unchanged in position projecting over the right upper hemithorax . The lungs are clear . No focal consolidation or edema . No pleural effusion . Lung volumes are slightly low , unchanged . The heart normal in size . The appearance of the mediastinum is overall unchanged . The descending thoracic aorta slightly tortuous ectatic , unchanged .
    OUTPUT:
    
Persistent small left apical pneumothorax . No change in the position of the left - sided chest tube .