title: Megakaryocyte markers in myeloproliferative disorders.
abstract: Identification of megakaryocyte precursors with immunohistochemical methods in bone marrow trephine biopsy specimens (embedded in a plastic resin, Immuno-Bed) was performed from patients with blastic phase of chronic granulocytic leukaemia (five cases), from chronic megakaryocytic-granulocytic myelosis (four cases) and from acute megakaryoblastic leukaemia (11 cases). In megakaryoblasts of bone marrow biopsies immunohistochemical reactions using the ABC method and monoclonal antibodies against von Willebrand antigen and GpIIb/IIIa (CD41) were visible in various percentages depending on the maturation's degree of megakaryocyte precursors. The number of circulating blast cells determined by flow cytophotometry was nearly similar to those of observed in biopsies. The greatest bone marrow reticulin content could be detected in acute megakaryoblastic leukaemia cases. Despite the different clinicopathological entities, the presence of the same phenotype (megakaryoblasts) was associated with a short survival in these haematological malignancies (in CGL MKB phase 4.0, in CMGM MKB phase 4.2, and in AML M7 5.8 months, respectively).
authors.affiliation: 2nd Department of Medicine, University Medical School, Debrecen, Hungary.
authors.forename: J L
authors.initials: JL
authors.lastname: Iványi
authors.forename: A
authors.initials: A
authors.lastname: Kiss
authors.forename: B
authors.initials: B
authors.lastname: Telek
authors.forename: I
authors.initials: I
authors.lastname: Tornai
mesh_terms: D000328:Adult; D000368:Aged; D000911:Antibodies, Monoclonal; D015415:Biomarkers; D001853:Bone Marrow / Q000473:pathology; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D007150:Immunohistochemistry; D007947:Leukemia, Megakaryoblastic, Acute / Q000473:pathology; D015464:Leukemia, Myelogenous, Chronic, BCR-ABL Positive / Q000473:pathology; D008297:Male; D008533:Megakaryocytes / Q000648:ultrastructure*; D008875:Middle Aged; D009196:Myeloproliferative Disorders / Q000473:pathology*; D013194:Staining and Labeling
chemical_list: D000911:Antibodies, Monoclonal; D015415:Biomarkers