EFNA2 and myeloid sarcoma: The percentages of ephrin-A2-positive cells were significantly higher for PBMCs (23.4 ± 1.5%) and T cells (8.6 ± 1.6%) of patients with RR-MS compared to HC (17.5 ± 1.2%, p = 0.006, and 3.8 ± 0.6%, p = 0.046, respectively, Figure 1B).