In the univariate analysis, tumor size ≤ 3 cm (P = 0.036); lymphatic invasion (P = 0.027); grade of the adenocarcinoma component (P = 0.000); CD56 (+) (P = 0.017); lymph nodes metastasis (P = 0.013) and vascular invasion (P = 0.006) were defined as predictors of DFS (Table 2). Here, NCAM1 is linked to adenocarcinoma.