CD200 and myeloid sarcoma: In the (NA)GM, the lowest amount of CD200 was found in Layers 1 and 2 of the cortex, which in MS, but not in controls, was significantly lower compared with Layers 3, 4, 5 and 6 (MS L1: OD 0.35 ± 0.04 and L2: OD 0.37 ± 0.04 versus L3: OD 0.42 ± 0.04, P < 0.0001, P = 5.0e−4, respectively, L4: OD 0.43 ± 0.05, P < 0.0001, P < 0.0001, respectively, L5: OD 0.42 ± 0.05, P < 0.0001, P = 2.0e−4, respectively, L6: OD 0.41 ± 0.05, P < 0.0001, P = 2.5e−3, respectively).