In the latter, Vβ13.1 expansion is more frequently found in CD4+CD8dim T cells expressing the killer lectin-like receptor NKG2D, a CD4+ T cell subset present in RA, human T-lymphotropic virus 1-associated myelopathy, and Wegener granulomatosis [108,111]. The gene discussed is CD4; the disease is granulomatosis with polyangiitis.