acute myelomonocytic leukemia M4 (MONDO_0018871, a Monarch Disease Ontology term) is an acute leukemia characterized by the proliferation of both neutrophil and monocyte precursors. (WHO, 2001). Also known as: AML M4, AMML, AMMoL, acute M4 myeloid leukaemia, acute M4 myeloid leukemia, acute myelomonocytic leukaemia, acute myelomonocytic leukaemia (FAB type M4), acute myelomonocytic leukemia.