Mediastinoscopy is limited inits ability to reach the posterior mediastinum andbronchoscopy is often unable to access the inferiormediastinum and aortopulmonary (AP) window.

• 纵隔镜检查不能探及后纵隔情况，支气管镜在检查下纵隔和主肺动脉窗方面能力有限。