FCGR1A and acute promyelocytic leukemia: Since CD64 was highly expressed in AML-M5 patients (CD64 ratio of AML-M5 was also higher compared to APL in our cohort; Figure 6A, high value dots), we again compared APL patients with non-APL/M5 AML patients in this cohort by removing the AML-M5 patients whose diagnosis was confirmed primarily by morphology.