A clonal proliferation of myeloid cells and their precursors in the bone marrow, peripheral blood, and spleen. When the proliferating cells are immature myeloid cells and myeloblasts, it is called acute myeloid leukemia. When the proliferating myeloid cells are neutrophils, it is called chronic myelogenous leukemia. The disease is Monarch Disease Ontology identifier MONDO_0004643 (myeloid leukemia). Also known as: leukaemia granulocytic, leukaemia myelogenous, leukaemia myeloid, leukemia granulocytic, leukemia myelogenous, leukemia myeloid, leukemia, granulocytic, malignant, myelocytic leukaemia.