FAB classification of AML

French-American-British (FAB) classification of acute myeloblastic leukemia (AML).


FAB subtypes

Name

M0

Minimally differentiated AML

(Undifferentiated AML)

M1

AML without maturation

M2

AML with maturation

M3

Acute promyelocytic leukemia (APL)

M4

Acute myelomonocytic leukemia

M4 eos

Acute myelomonocytic leukemia

with eosinophilia

M5

Acute monoblastic/monocytic leukemia

M6

Acute erythroid leukemia

M7

Acute megakaryoblastic leukemia

(related to down syndrome) 


Subtypes M0 to M5 all start in immature forms of white blood cells (WBC).

Subtype M6 AML starts in very immature forms of red blood cells (RBC).

Subtype M7 AML starts in immature forms of cells that make platelets.


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