Keywords Carcinoma;non-small-cell lung;Neoplasm metastasis;Reverse transcriptase polymerase chain reaction;Keratin;Carcinoembryonic antigen;Lung specific X protein;

• 癌;非小细胞肺;肿瘤转移;逆转录聚合酶链反应;角蛋白;癌胚抗原;肺特异性X蛋白;