Results:Of 40 patients,there are metastasis of both of lung in 23 (57.5%),lymph node enlargement in 12 (30%) which located predominantly in anterior space of trachea (9/12,75%),aortic-pulmonary window (5/12,41.6%) and sub carina (4/12,33.3%).

• 淋巴结转移12例(12/40,30%25),主要位于气管前间隙(9/12,75%25)、主肺动脉窗(5/12,41·6%25)和气管隆突下间隙(4/12,33·3%25);