目的 Lung volume reduction surgery usually gives rise to high postoperative morbidity and impedes its further application.Recently,a plethora of bronchoscopic lung volume reduction techniques such as on
目的 A 45-year-old man with progressive dyspnea was found to have a parachordoma(PC)in trachea 方法 A 45-year-old man was hospitalized with long lasting(more than 1 year),gradually increasing and drug-res