MPO and acute promyelocytic leukemia: In the univariable logistic regression, APL was differentiated from non-APL with an accuracy of 76% by CD117 (AUC = 0.76; cut-off: ≥ 49% cells), 84% by CD13 (AUC = 0.84; cut-off: ≥ 88% cells), 65% by CD56 (AUC = 0.65; cut-off: ≤ 25% cells), 82% by CD64 (AUC = 0.82; cut-off: ≥ 42% cells), and 85% by MPO (AUC = 0.85; cut-off: ≥ 97% cells) (Table 1).