The representative histograms of the expression level of P-selectin (Fig. 5) and the active form of GPIIb/IIIa (Fig. 6) on collagen-stimulated platelets from healthy subject (C) and SP MS patient (F) confirmed a twofold increase in the expression of CD62P and a 1.8-fold increase in PAC-1 binding. The gene discussed is ITGA2B; the disease is myeloid sarcoma.