CD4 and acute myeloid leukemia: In this study, we investigated Th22 (CD4+IFN-γ−IL-17−IL-22+), Th17 (CD4+IL-17+), pure Th17 (CD4+IFN-γ−IL-22−IL17+), and Th1 cells (CD4+IFN-γ+), plasma IL-22 or IL-17 levels and mRNA expression of RORC in peripheral blood (PB) of AML patients.