Abstract
A 49-year-old male presented with a giant bullous emphysematous lung mimicking a pneumothorax. The initial chest X-ray revealed that the left lung was totally collapsed. A chest tube was inserted at the emergency room, after that an iatrogenic pneumothorax developed. The HRCT showed giant bullous emphysema mimicking a pneumothorax. The pneumothorax spontaneously resolved without special treatment. His bullous lung lesion had remained unchanged until last follow-up.