FOXP3 mRNA, which codes for the Treg transcription factor Foxp3, was 6.4-fold higher in brain-stimulated cells compared to unstimulated cell in MS patients (adjusted p-value < 0.02), but the difference was more profound in the control brain-stimulated cells relative to either flu-stimulated cells (19-fold change, adjusted p-value < 0.0001) or unstimulated cells (37-fold change, p < 2e-5). This evidence concerns the gene FOXP3 and myeloid sarcoma.