Fig. 5From: Prognostic value of programmed death-1, programmed death-ligand 1, programmed death-ligand 2 expression, and CD8(+) T cell density in primary tumors and metastatic lymph nodes from patients with stage T1-4N+M0 gastric adenocarcinomaPD-1 expression (red signals) on CD8(+) T cells (green signals) in primary tumors and lymph nodes from a 54-year-old male patient with stage II gastric adenocarcinoma. PD-1 expression on CD8(+) T cells was stronger in the primary tumor (a) and in metastatic lymph nodes (b) than in tumor-free lymph nodes (c)Back to article page