Research Paper Volume 15, Issue 4 pp 1107—1129
Prognostic significance of epidermal growth factor receptor and programmed cell death-ligand 1 co-expression in esophageal squamous cell carcinoma
Figure 9. The Kaplan-Meier survival curves in ESCC patients without esophagectomy. (A) OS survival curves according to EGFR and PD-L1 co-expression. (B) PFS survival curves according to EGFR and PD-L1 co-expression. Blue line indicates EGFR (−)/PD-L1(+); green line indicates EGFR (−)/PD-L1(−); yellow line indicates EGFR (+)/PD-L1(+); purple line indicates EGFR (+)/PD-L1(−); Abbreviations: ESCC: Esophageal Squamous Cell Carcinoma; OS: overall survival; EGFR: Epidermal Growth Factor Receptor; PD-L1: programmed death-ligand 1; PFS: Progression Free Survival.