CD4 and gastric cancer: The profiling of T cells from the peripheral blood of patients with gastric cancer with different rates of prognosis revealed a high density of Treg cells in patients with a worse prognosis than those of patients with a good prognosis and of healthy subjects, in which Treg cells (CD4+/CD25+) expressed a higher level of IL-10 secretion than CD4+/CD25− cells [66].