Fig. 4From: Heterogeneity of PD-L1 expression in primary tumors and paired lymph node metastases of triple negative breast cancerKaplan–Meier survival curve for disease-free survival according to PD-L1 expression in PTs and LNMs. DFS was not significantly worse in patients with PD-L1 expression in the PT and tumor cells in the LNM (a, b, d). DFS was significantly worse in patients with PD-L1 expression in the nodal lymphocytes (c)Back to article page