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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
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 56 (1978), S. 225-227 
    ISSN: 1432-1440
    Keywords: Angioimmunoblastische Lymphadenopathie ; Zytochemie ; Immunoblastische Lymphadenopathie ; Malignes Lymphom ; PAS-Reaktion ; Angioimmunoblastic lymphadenopathy ; Cytochemistry ; Immunoblastic lymphadenopathy ; Malignant lymphoma ; PAS-reaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Cytological preparations have been investigated with the PAS-reaction in 8 cases of angioimmunoblastic lymphadenopathy, 7 of which were malignant, including 2 cases of “plasmoblastic” sarcoma. The two sarcoma cases showed intensely PAS-positive tumor cells similar to those known from acute leukemias and malignant lymphomas. Two cases of malignant angioimmunoblastic lymphadenopathy disclosed very many, two more such cases only occasionally positive cells. One malignant case only was completely negative. Some positive cells were found in the case that appeared benign. The PAS reaction is recommended as a diagnostic aid in angioimmunoblastic lymphadenopathy.
    Notes: Zusammenfassung In 8 Fällen von angioimmunoblastischer Lymphadenopathie, von denen 7 maligne waren einschließlich zweier Fälle von „plasmoblastischem“ Sarkom, wurden zytologische Präparate mit der PAS-Reaktion untersucht. Die beiden Sarkomfälle zeigten PAS-positive Tumorzellen, ganz entsprechend jenen, die von akuten Leukämien und malignen Lymphomen her bekannt sind. Zwei Fälle von maligner angioimmunoblastischer Lymphadenopathie zeigten sehr viele, zwei weitere nur gelegentlich positive Zellen. Nur ein maligner Fall war vollständig negativ. In dem gutartig erscheinenden Fall fanden sich nur einige wenige positive Zellen. Die PAS-Reaktion wird als eine diagnostische Hilfe in Fällen von angioimmunoblastischer Lymphadenopathie empfohlen.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1440
    Keywords: Monozytopoiese ; Chronische myeloische Leukämie ; Monozytenkrise ; Promyelozyten ; Zytochemie ; Monocytopoiesis ; Chronic myeloid leukemia ; Monocytic crisis ; Promyelocytes ; Cytochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary A case of Ph1-positive chronic granulocytic leukemia is described in which a terminal monocytic crisis developed. The case still was Ph1-positive at the time of the monocyte crisis. Bone marrow smears contained promyelocytes and early granulocytes, but most of the cells belonged to the monocyte series as cytochemistry disclosed. No blast cells could be detected. Cytochemically, transitions between promyelocytes and promonocytes could be demonstrated. From these findings and those from the literature it is concluded that the monocytes of the terminal crisis in our case belonged to the leukemic cell strain and that these monocytes developed from non-specific promyelocytes like granulocytes. Our observation does not provide evidence for the existence of a separate monoblast which would implicate disparity of granulocytopoiesis and monocytopoiesis already at the level of undifferentiated blast cells. This, in turn, would be equal to a re-introduction of a modified polyphyletic theory of white blood cell formation.
    Notes: Zusammenfassung Es wird ein Fall von Ph1-positiver chronischer myeloischer Leukämie beschrieben, bei dem sich final eine Monozytenkrise entwickelte. Auch zum Zeitpunkt der Monozytenkrise war der Fall weiterhin Ph1-positiv. Präfinal enthielten die Knochenmarksausstriche Promyelozyten und andere Granulozytenvorstufen, jedoch gehörten die meisten der Knochenmarkszellen zur Monozytenreihe (Promonozyten und Monozyten), wie dies zytochemisch festgestellt werden konnte. Blasten waren in dem Knochenmark nicht enthalten. Zytochemisch konnten alle Über-gänge zwischen Promyelozyten und Promonozyten gefunden werden. Aus diesen Befunden und aus den Befunden der Literatur ergibt sich die Schlußfolgerung, daß die Monozyten der terminalen Krise leukämische Zellen darstellen und daß diese Monozyten sich aus unspezifischen Promyelozyten entwickelten. Unsere Beobachtung ergibt keinen Hinweis auf die Existenz eines eigenständigen Monoblasten, welche eine vollständige Trennung von Granulopoiese und Monozytopoiese bedeuten und einer modifizierten polyphyletischen Ableitung der weißen Blutzellen gleichkommen würde.
    Type of Medium: Electronic Resource
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