M0 Myeloblastic leukemia with little maturation

M1 AML with no Romanowsky or cytochemical evidence of differentiation

M2 Myeloblastic leukemia with maturation

M3 Acute promyelocytic leukemia (APL)

M3h APL, hypergranular variant

M3v APL, microgranular variant

M4 Acute myelomonocytic leukemia (AMML)

M4eo AMML with dysplastic marrow eosinophils

M5 Acute monoblastic leukemia (AMoL)

M5a AMoL, poorly differentiated

M5b AMoL, differentiated

M6 Erythroleukemia

M6a AML with erythroid dysplasia => MDS

M6b Erythroleukemia

M7 Acute megakaryoblastic leukemia (AMkL)

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MPO/POX (+): myeloid

CAE (chloroacetate esterase): M3, M4 (>20%), M6