CD133 expression was significantly correlated with tumor diameter of > 5 cm (P = 0.041), severer lymph node metastasis (P = 0.017), later TNM stage (P = 0.044), occurrences of lymphatic vessel infiltration (P = 0.000) and vascular infiltration (P = 0.000) (Table 1). This evidence concerns the gene PROM1 and neoplasm.