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  • 1
    ISSN: 1432-0584
    Keywords: Key words CML ; Myelofibrosis ; Dynamics ; Megakaryocytes ; Morphometry ; Interferon ; Busulfan ; Sequential bone marrow biopsies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  To evaluate treatment-related changes of the reticulin stain-measured fibrosis in Ph1+-CML, a clinicopathological study was performed on sequential trephine biopsies of the bone marrow following either interferon (IFN) or busulfan (BU) monotherapy. Using the monoclonal antibody CD61 for the identification of megakaryopoiesis and Gomori's silver impregnation method, number of megakaryocytes and density of argyrophilic (reticulin and collagen) fibers were determined by morphometry. We studied specimens from 26 patients with IFN-alpha 2b (including nine patients with additional IFN gamma) therapy and from 23 patients who had received BU. In both groups, repeated bone marrow biopsies (total 125) revealed a significant increase in the fiber content, as well as in the number of megakaryocytes during treatment. To assess the dynamics of myelofibrosis more precisely, computation of differences in the degree of fiber density between the first and last examination was carried out. Regarding the considerable variations in the biopsy intervals, a so-called myelofibrosis progression index (MPI) was calculated. Following this rationale, we were able to demonstrate that, in comparison to the BU-group, speed of progression of bone marrow fibrosis was significantly increased in CML patients treated with IFN. Preliminary statistical analysis indicated a relationship between myelofibrosis on admission, which was always associated with increased growth of megakaryocytes, and the MPI with survival. Even when these parameters were regarded, prognosis was significantly more favorable in the IFN-treated patients. The failure of IFN and BU to inhibit the evolution of myelofibrosis may be related to several conversely acting pathomechanisms. Among others, the inability of both therapeutic agents to reduce the number of megakaryocytes more effectively should be taken into consideration.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0584
    Keywords: CML ; Myelofibrosis ; Dynamics ; Megakaryocytes ; Morphometry ; Interferon ; Busulfan ; Sequential bone marrow biopsies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To evaluate treatment-related changes of the reticulin stain-measured fibrosis in Ph1+-CML, a clinicopathological study was performed on sequential trephine biopsies of the bone marrow following either interferon (IFN) or busulfan (BU) monotherapy. Using the monoclonal antibody CD61 for the identification of megakaryopoiesis and Gomori's silver impregnation method, number of megakaryocytes and density of argyrophilic (reticulin and collagen) fibers were determined by morphometry. We studied specimens from 26 patients with IFN-alpha 2b (including nine patients with additional IFN gamma) therapy and from 23 patients who had received BU. In both groups, repeated bone marrow biopsies (total 125) revealed a significant increase in the fiber content, as well as in the number of megakaryocytes during treatment. To assess the dynamics of myelofibrosis more precisely, computation of differences in the degree of fiber density between the first and last examination was carried out. Regarding the considerable variations in the biopsy intervals, a so-called myelofibrosis progression index (MPI) was calculated. Following this rationale, we were able to demonstrate that, in comparison to the BU-group, speed of progression of bone marrow fibrosis was significantly increased in CML patients treated with IFN. Preliminary statistical analysis indicated a relationship between myelofibrosis on admission, which was always associated with increased growth of megakaryocytes, and the MPI with survival. Even when these parameters were regarded, prognosis was significantly more favorable in the IFN-treated patients. The failure of IFN and BU to inhibit the evolution of myelofibrosis may be related to several conversely acting pathomechanisms. Among others, the inability of both therapeutic agents to reduce the number of megakaryocytes more effectively should be taken into consideration.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 108 (1970), S. 117-137 
    ISSN: 1432-1076
    Keywords: Acute Hemoblastosis ; Erythremic Myelosis ; Cytology ; Cytochemistry ; Acid Phosphatase ; Alpha-naphthyl Acetat Esterase ; Periodic Acid Schiff Reaction ; Hepatosplenomegaly
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird über drei Beobachtungen einer akuten kindlichen Hämoblastose berichtet, die sich durch folgende Besonderheiten auszeichneten: Blutbild und Knochenmark wurden beherrscht von basophilen undifferenzierten Blutbild und Knochenmark wurden beherrscht von basophilen undifferenzietten Zellen mit paranucleärer Plasmaaufhellung. Daneben fanden sich megaloblastoide Erythroblasten und atypische Erythrocyten. Die undifferenzierten Zellen besaßen paranucleär eine umschriebene, starke Aktivität von saurer Phosphatase und eine umschriebene schwache Aktivität von Alpha-Naphthylacetat-Esterase. Organinfiltrate bestanden aus undifferenzierten Blasten, waren aber in unterschiedlichem Ausmaß von Makroblasten und Normoblasten durchmischt. Die Makroblasten und Normoblasten der Blut-und Knochenmarksausstriche zeigten eine verstärkte Aktivität von Alpha-Naphthylacetat-Esterase. Die Veränderungen der Anzahl der Erythroblasten und der undifferenzierten Zellen im Blut liefen paralle. Eine positive PAS-Reaktion wurde in einem Teil der Blasten, der Erythroblasten und der Erythrocyten erzielt. Klinisch fielen sehr hohe Gesamtzellzahlen im Blut auf, die weit über 100 000/mm3 lagen. Auch bestand von Anfang an eine stark ausgeprägte Hepatosplenomegalie. Beides ist für kindliche Leukosen ungewöhnlich. Die therapeutischen Maßnahmen—insbesondere eine Corticoidgabe—brachten bei allen drei Patienten im Gegensatz zum Durchschnitt der akuten kindlichen Leukosen keinen oder kaum einen Erfolg. Auf Grund dieser Befunde werden die drei Beobachtungen als akute, unreifzellige, erythrämische Myelose angesehen und von anderen akuten Hämoblastosetypen abgegrentzt.
    Notes: Abstract Three cases of acute hemoblastosis are reported which revealed the following peculiarities: In the peripheral blood and in the bone marrow basophilic undifferentiated cells with a prominent clear paranuclear plasma zone dominated; megaloblastoid erythroblasts and atypical erythrocytes were also found. The undifferentiated cells shwoed a strong acid phosphatase activity in the paranuclear region and a relatively weak activity of alpha-naphthyl acetate esterase. No activity of naphthol AS-D chloroacetate esterase could be demonstrated in these cells. The parenchymal infiltrates consisted mainly of undifferentiated cells intermingled with various numbers of macroblasts and normoblasts. Macroblasts and normoblasts showed an increased activity of alpha-naphthyl acetate esterase. In the blood cell counts the number of erythrocblasts paralleled that of the undifferentiated cells. Blasts, erythroblasts and erythrocytes were partly PAS-positive. In all three cases the nucleated blood cell count was extremely high from the onset of the disease, which is unusual in infantile leucemia. Furthermore, a marked hepatosplenomegaly was observed from the very beginning. In contrast to the usual reaction to therapy, all three cases showed little or no response, particularly to corticosteroids. On the basis of the observations mentioned above all three cases are regarded as extremely undifferentiated acute erythremic myeloses.
    Type of Medium: Electronic Resource
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