Table Classification of acute leukaemias

FAB subtypeMorphology variant% cases
AML
M0minimally differentiated leukaemia2–3
M1myeloblastic leukaemia without maturation20
M2myeloblastic leukaemia with maturation25–30
M3hypergranular promyelocytic leukaemia8–15
M4myelomonocytic leukaemia20–25
M5monocytic leukaemia20–25
M6erythroleukaemia (Di Guglielmo's disease)5
M7megakaryoblastic leukaemia1–2
ALL
L1small; uniform (pre-B cell, T cell)75
L2large; nonuniform (pre-B cell, T cell)20
L3large; uniform; vacuola (B cell, Burkitt's)5