The percentages of CD45 + PD-1 + lymphocytes, CD3 + PD-1 + T cells, CD3 + CD4 + PD-1 + T cells in peripheral blood were not correlated with the different primary sites in secondary peritoneal neoplasms group (p > 0.05, Fig. 5B). The gene discussed is PDCD1; the disease is peritoneal neoplasm.