CCR3 and myeloid sarcoma: CX3CL1/CX3CR1; CXCL13/CXCR5; CXCL9/CXCR3; CCL5/CCR1, CCR3, CCR5; CCL2/CCR2; and CCR3 are expressed by astrocytes, macrophages, and microglia within acute and chronic lesions in MS [10].