CD4-positive helper T cell T-helper 17 cell CD4-positive, alpha-beta T cell with the phenotype RORgamma-t-positive, CXCR3-negative, CCR6-positive, and capable of producing IL-17. IL-17-producing CD4+ T helper T helper cells type 17 T(H)-17 cell Th17 T cell Th17 T lymphocyte Th17 T-cell Th17 T-lymphocyte Th17 cell cell helper T cell type 17 Th17 CD4+ T cell This cell type is compatible with the HIPC Lyoplate markers for 'Th17 CD4+ T cell', but its logical definition includes additional known characteristics of T-helper 17 T cells.