title: Histological and cytological heterogeneity of bone marrow in Philadelphia-positive chronic myelogenous leukaemia at diagnosis.
abstract: Cytological and histological features of the bone marrow in Philadelphia-positive chronic myelogenous leukaemia (CML) at diagnosis were analysed in a prospective study. Formerly described (Frisch et al, 1984) subtypes GRAN and GRAN/MEG were found, and myelofibrosis and incipient blast crisis could also be detected. A more or less continuous spectrum of number and degree of atypias in megakaryocytes was found. Biopsy and imprint were complementary in making differential diagnosis of both subtypes. Cytologically, type GRAN/MEG was characterized by a mixed proliferation of neutrophil, eosinophil and basophil series, besides proliferation of megakaryocytes. Type GRAN showed a predominantly neutrophilic proliferation. The importance of performing bone marrow analysis in evaluation of CML patients is discussed.
mesh_terms: D000328:Adult; D001853:Bone Marrow / Q000473:pathology*; D002452:Cell Count; D006098:Granulocytes / Q000473:pathology; D006801:Humans; D007951:Leukemia, Myeloid / Q000235:genetics / Q000473:pathology*; D008533:Megakaryocytes / Q000473:pathology; D010677:Philadelphia Chromosome; D011446:Prospective Studies