NCAM1 and adenocarcinoma: In the multivariate analysis, TNM stage(HR 6.444 95%CI 1.477–28.121 P = 0.013), lymph node metastasis (HR 10.617 95%CI 1.409–79.997 P = 0.022), vascular invasion (HR 5.855 95%CI 1.719–19.940 P = 0.005), grade of the adenocarcinoma component (HR 3.876 95%CI 1.451–10.357 P = 0.007) and CD56 positivity (HR 0.265 95%CI 0.100–0.705 P = 0.008) were independent predictors of overall survival (Table 3).