Objective To explore the value of left parasternal anterior mediastinaotomy (Chamberlain procedure) in the diagnosis of mediastinal lymph node enlargement with unknown causes and anterior mediastinal space-taking lesions.

• 目的 探讨左前纵隔切开术在不明原因的纵隔淋巴结肿大和前纵隔占位诊断中的价值。