An acute myeloid leukemia (AML) characterized by blasts without evidence of maturation to more mature neutrophils. (WHO, 2001). The disease is MONDO_0005224 (acute myeloblastic leukemia without maturation). Also known as: AML M1, AML without maturation, FAB M1, M1 acute granulocytic leukaemia, M1 acute granulocytic leukaemia without maturation, M1 acute granulocytic leukemia, M1 acute granulocytic leukemia without maturation, M1 acute myeloblastic leukaemia.