sentence: Closed pneumothorax is when air or gas gets in the pleural space without any outside wound.
sentences_after: This sometimes happens when the lung is already injured somehow, like from diseases such as cancer or cystic fibrosis. The most common cause of closed pneumothorax is called spontaneous pneumothorax. The cause of spontaneous pneumothorax is not known.
concept_name: closed pneumothorax
headings: Pneumothorax Closed pneumothorax