Considering that upregulated CCL2 (monocyte chemoattractant protein-1, MCP-1) expression is important for (i) the accumulation of proinflammatory dendritic cells and macrophages in the CNS during EAE [43, 44] and MS [45], and (ii) chronic EAE development [46, 47], the expression of mRNA for CCL2 was examined. The gene discussed is CCL2; the disease is myeloid sarcoma.