Assessment of chemokine receptor profiles in the PB of MS patients reveal that CD20+T cells bear CC chemokine receptor (CCR)2, CCR5, CCR6, CXC chemokine receptor 3 (CXCR3) and CXCR6, and more so than CD20 ̄ T cells [19, 20]. This evidence concerns the gene MS4A1 and myeloid sarcoma.