abnormal myelopoiesis abnormal myeloid cell differentiation MPheno.ontology MP:0000169 myelopoiesis abnormalities anomaly in the process of, or atypical formation of myeloid cells from the pluripotent hematopoietic stem cells in the bone marrow from myeloid stem cells, including the production of leukocytes in blood, such as monocytes and granulocytes and precursor cells for macrophage and dendritic cells found in the lymphoid tissue MP:0001601 abnormal leukopoiesis