On Spiral CT scan,the accuracy in diagnosing invasion of pleural and detecting for lymph node metastasis was 86.67% and 88.24% respectively,whereas the accuracy of staging in TNM was 81.25%,The abnormal expression rate of E-cad was 55.17%.

• 58例周围型肺癌中；螺旋CT判断胸膜侵犯准确率为86.；67%25；淋巴结转移准确率为88