Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided chest tube is in place . There is a small - to moderate - sized pneumothorax , seen at the apex of the lung and extending along the medial upper surface of the lung , with small amount of atelectasis at the left base . The mediastinum remains midline . There is slight upper zone redistribution and mild prominence of basilar markings , but I doubt overt CHF . No frank consolidation or gross effusion . Minimal blunting of the right costophrenic angle may be present . Suspect background COPD . There is mild right convex curvature of the thoracic spine on this semi-upright view . Note is made of the fusion construct in the lower thoracic / upper lumbar spine , nominal alignment on these films . Allowing for the gastric air bubble , no free air seen beneath the diaphragm .
    OUTPUT:
    
Small - to - moderate left pneumothorax in the setting of a left chest tube . Findings were discussed with Dr . ___ at approximately 8 :00 a .m . on ___ .