Fig. 4

a The overall survival rate in patients with T3 + T4 tumors was significantly different between LNN subgroups. b The overall survival rate in the patients with T1 + T2 tumors had no statistical difference
a The overall survival rate in patients with T3 + T4 tumors was significantly different between LNN subgroups. b The overall survival rate in the patients with T1 + T2 tumors had no statistical difference