Adhesion and transmigration capacities were studied to further characterize the function of c-Met<sup>+</sup> CD4 T cells.<h4>Results</h4>c-Met<sup>+</sup> memory CD4 T cells were detected at higher levels in both blood (median of 1.98%) and CSF (5.88%) in MS compared to NIND (0.37% and 0.68%, respectively) (p < 0.0001). The gene discussed is CD4; the disease is myeloid sarcoma.