_:vb50950044 "url:https://en.wikipedia.org/wiki/Pneumothorax"^^ . _:vb50950044 "A pleural disease that is characterized as an abnormal collection of air in the pleural space between the lung and the chest wall."^^ . _:vb50950044 . _:vb50950044 . _:vb50950044 . _:vb50950044 "url:https://medlineplus.gov/ency/article/000087.htm"^^ . _:vb50950044 .