We analyzed the association of B7 family expression with overall survival status (Dead; Alive), gender (Male; Female), cancer status (Tumor; Normal), race (Asian; White; Others), tumor differentiation grade (G1; G2; G3), pathological stage (Stage I; Stage II; Stage III; Stage IV), tumor topography (T1; T2; T3; T4) and lymph node(N1; N2; N3; N4) through chi-square test as shown in Table 1. The gene discussed is CD80; the disease is cancer.