CXCR4 and acute myeloid leukemia: In this study, we investigated the expression of CXCR4 in relation to the clinical outcome of patients with AML.25, 26 In the AML prognostic group, cytogenetically normal (CN)‐AML was classified as a medium prognostic group, but this type of AML showed heterogeneity in terms of prognosis, and some of them still had poor outcome.