It was also found the peritoneal neoplasms patients presented with higher levels of circulating CD3 + CD4 + T cells, CD3 + CD8 + T cells, PD-1 + T lymphocytes, PD-1 + CD4 + T cells and PD-1 + CD8 + T cells, compared with health control. The gene discussed is PDCD1; the disease is peritoneal neoplasm.