pneumothorax noun. [nju:mǝʊ'Ɵɔ:raks] Pl. -races [-rǝsi:z], -raxes. E19.
[from PNEUMO- + THORAX.]
Medicine. The presence of air or gas in the pleural cavity of the thorax, caused by perforation of the chest wall or of the lung; pneumatothorax.
artificial pneumothorax pneumothorax induced diagnostically or, formerly, in the treatment of tuberculosis.

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