Figure 2 .

Kaplan-Meier disease-specific survival estimates according to the location of positive regional lymph nodes. The median survival time was not reached with a 5-year survival rate of 80% in patients without nodal disease (pN0). The median survival time was 74 months with a 5-year survival rate of 57% in patients with pN1 disease. The median survival time was 13 months with a 5-year survival rate of 23% in patients with pN2 disease. The survival post-resection differed significantly among the groups ( P < 0.001).