CD200 and acute myeloid leukemia: For patients with cytogenetically normal acute myeloid leukemia(AML), high CD200 expression was associated with lower complete remission rates (9/18 or 50%) relative to CD200− patients (56/71 or 79%) and was accompanied by lower 3-year DFS (0%) and 3-year overall survival (0%) relative to CD200− patients (65% and 51%, respectively) [26].