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Acute megakaryoblastic leukemia (AMKL) is life-threatening leukemia in which malignant megakaryoblasts proliferate abnormally and injure various tissues. Megakaryoblasts are the most immature precursor cells in a platelet-forming lineage; they mature to promegakaryocytes and, ultimately, megakaryocytes which cells shed membrane-enclosed particles, i.e. platelets, into the circulation.
Megakaryoblasts typically have a large oval-shaped nucleus or a nucleus that is lobed with many nuclei. [2] The megakaryoblast resembles the myeloblast or lymphoblast morphologically; however the megakaryoblast varies in phenotype and the structure viewed with electron microscopy.
A megakaryocyte (from mega- 'large' karyo- 'cell nucleus' and -cyte 'cell') is a large bone marrow cell with a lobated nucleus that produces blood platelets (thrombocytes), which are necessary for normal clotting.
Transient myeloproliferative disease develops and may be of concern in fetuses. Features in a review of 39 reported fetal cases include: reduced platelet production often accompanied by significantly reduced levels of circulating platelets; reduced red blood cell production sometimes accompanied by mild anemia; increased levels of circulating megakaryoblasts and white blood cells; grossly ...
Leukemia (also spelled leukaemia; pronounced / l uː ˈ k iː m iː ə / [1] loo-KEE-mee-ə) is a group of blood cancers that usually begin in the bone marrow and produce high numbers of abnormal blood cells. [9]
A comprehensive diagram of human hematopoiesis. Granulopoiesis consists of 5 stages, in which the myeloblast is the first recognizable cell. Next in the differentiation sequence is the monoblast and the promyelocyte, which can develop into one of three different precursor cells: the neutrophilic, basophilic or eosinophilic myelocyte.
The features generally used to define an MDS are blood cytopenias, ineffective hematopoiesis, dyserythropoiesis, dysgranulopoiesis, dysmegakaropoiesis, and increased myeloblasts. [citation needed] Dysplasia can affect all three lineages seen in the bone marrow.
Acute myeloid leukemia (AML) is a cancer of the myeloid line of blood cells, characterized by the rapid growth of abnormal cells that build up in the bone marrow and ...