A precursor of a granulocyte leukocytes (eosinophils, basophils, and neutrophils) that normally occurs in bone marrow but increases in number in peripheral circulation in certain diseases, especially myeloblastic leukemia.
The earliest identifiable cell that gives rise to a granulocyte, having a large nucleus and scanty cytoplasm. It is normally found in the blood-forming tissue of the bone marrow, but may appear in the blood in a variety of diseases, most notably in acute myeloblastic leukemia.
Present in the blood-producing tissue of the bone marrow, this is a cell with a large nucleus and scanty cytoplasm. It is the precursor cell of a granulocyte. Myeloblasts sometimes appear in the blood of patients with various diseases including acute myeloblastic leukaemia.
Immature bone marrow cell that develops into a myelocyte. It matures to develop into a promyelocyte, and eventually into a granular leukocyte.