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  • 1
    ISSN: 1432-1440
    Keywords: Haarzelleukämie ; IFN-Therapie ; Zellmarker ; Thymidineinbau
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In einer multizentrischen „open label“ Studie mit IFN-α2b wurden 85 Patienten mit Haarzell-Leukämie behandelt und ausgewertet. Die Induktionsbehandlung bestand in 2 × 106 E IFN-α2b/m2, 3 × wöchentlich, s.c. Die Ergebnisse zeigen die hohe Effektivität der Substanz, wobei unter den verwendeten Dosierungen geringe, gut tolerierbare und passagere Nebenwirkungen im Sinne eines grippeähnlichen Syndroms auftraten. Die Prozentzahl der Remissionen (CR + PR + MR) nach sechsmonatiger Behandlungszeit lag bei 89%, der Anteil von CR betrug 4%, von PR 69%. An einer kleinen Gruppe (4 Patienten) wurde nach Erzielen einer CR oder PR der Effekt unterschiedlicher Formen der Erhaltungstherapie getestet. Die bisherigen, statistisch noch nicht auswertbaren Resultate sprechen dafür, daß bei Auftreten eines Rückfalles nach Aussetzen oder Verringerung der IFN-Dosis (3 × 106 I.E., s.c., 1 × wöchentlich) durch Wiedereinsetzen oder Erhöhung von IFN-α2 neuerlich Remissionen erzielt werden können. Zur Erhaltung der Remissionen dürfte eine IFN-Dauertherapie notwendig sein. Mittels eines Kurzzeit in vitro Tests werde der Effekt von Interferon α2 auf die Inkorporation von H3-Thymidin und H3-Uridin in Haarzellen bestimmt. Für beide Präkursoren ergab sich keine Hemmung des Einbaues. Allerdings zeigte eine Langzeitinkubation (48 h) einen signifikant vermehrten H3-Uridin Einbau, während der H3-Thymidin Einbau unbeeinflußt blieb. Diese Resultate sprechen gegen einen unmittelbaren antiproliferativen Effekt von IFN-α2 auf Haarzellen, sie weisen aber auf eine Induktion der RNS-Synthese hin. Eine Zellmarker-Analyse der Haarzellen mit monoklonalen Antikörpern vor und während einer 7tägigen in vitro Behandlung mit IFN-α2 ergab keine Änderung des Phänotyps, so daß eine differenzierende Wirkung des IFN auf Haarzellen nicht beobachtet werden konnte.
    Notes: Summary Eighty-five patients with hairy-cell leukemia were treated in a multicentric “open label” study with IFN-α2b and evaluated. Induction therapy was 2 × 106 U IFN-α2b/m2, 3 times a week, s.c. The results show this regimen to be highly effective with only a few tolerable and transient side effects consisting mainly of flu-like symptoms. After 6 months of therapy 4% CR, 69% PR, and 16% MR, were noted. In a small group of four patients who had achieved CR or PR, we tested the effect of varying doses for maintenance therapy. Our preliminary results indicate that a relapse caused by interruption of IFN therapy or dose reduction to 3 × 106 U given once a week, o.c. could be successfully treated by readministration, or escalating the dosage of IFN. It seems that remission maintenance requires long-term treatment with IFN. In a short-term in vitro test we studied the effect of IFN-α2 on the incorporation of3H-thymidine and3H-uridine into hairy cells of five patients. Fort both precursors no appreciable effect was detected. However, after prolonged incubation for 48 h, a significant enhancement of3H-uridine incorporation was observed, while3H-thymidine incorporation remained unaffected. Cell marker analysis performed with monoclonal antibodies before and after incubation of hairy cells with IFN-α2 for up to 7 days did not reveal any change of the phenotype of hairy cells.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Histopathology 15 (1989), S. 0 
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The case of an 82-year-old female patient with extramedullary haematopoiesis in the thyroid gland due to agnogenic myeloid metaplasia is reported.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 358 (1973), S. 163-171 
    ISSN: 1432-2307
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es werden 3 Fälle von Castleman-Lymphom (männl. 14a, weibl. 17a, weibl. 18a) beschrieben. Zwei zufällig bei Röntgenreihenuntersuchungen entdeckte intrathorakal gelegene Lymphome verursachten keinerlei Beschwerden. Die Patientin mit einem cervicalen Lymphom litt an Fieberschüben und Abgeschlagenheit. Histologisch besteht neben der Follikelhyperplasie eine starke Vascularisation mit Endothelschwellung und Hyalinose in den Keimzentren, unter Bildung zwiebelschalenartiger Wucherungen, ähnlich jungen Hassallschen Körperchen des Thymus. Auch wenn die Ätiologie ungeklärt ist, denken wir an eine hamartomartige Gefäßproliferation in einem Lymphknoten. Die Bedeutung des gutartigen Krankheitsbildes liegt in der Differentialdiagnose zu malignen Lymphknotentumoren.
    Notes: Summary Three cases of Castleman-lymphoma (m. 14a, f. 17a and 18a) are presented. Two intrathoracic lymphomas, accidentally discovered during routine X-ray examination, did not cause any discomfort to the patients, whereas one patient with a cervical lymphoma suffered from attacks of fever and general prostration. Histologically there were follicular hyperplasia, extensive vascularisation with swelling of the endothelium and hyalinosis within the germinal centers with concentrically arranged cells like young Hassall bodies of the thymus. Although the etiology remains unknown, we prefer to think of this lesion as a hamartoma-like vascular-proliferation within a lymphnode. The significance of this benign disease lies in its differential diagnosis from malignant lymphatic tumors.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-0584
    Keywords: Idiopathic myelofibrosis ; Interferon-alpha
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We investigated the effect of human recombinant DNA-derived IFN-alpha-2 given in a dose of 1–2×106 units daily by subcutaneous injection to five patients with advanced idiopathic myelofibrosis (IM). Transfusion dependent anemia and symptomatic splenomegaly were taken as inclusion criteria for this pilot study. Two patients succumbed, one and three months after starting interferon-treatment because of pneumonia and traumatic cranial injury, respectively. While on IFN-treatment no improvement of cytopenia or reduction of splenomegaly was seen in four of the patients. In one patient, however, the requirement for erythrocyte transfusions decreased from 5 to 1.7 monthly upon IFN-treatment. After two, four and six months respectively IFN-treatment had to be stopped in these cases because of progressive thrombocytopenia and/or neutropenia. These observations suggest, that IFN-alpha might be of only marginal value in the treatment of advanced idiopathic myelofibrosis.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-0584
    Keywords: Key words Primary germ cell tumor ; Acute monocytic leukemia with unusual phenotype
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  A case of acute monocytic leukemia with rearrangement of the immunoglobulin heavy-chain gene and strong cytoplasmic immunoglobulin expression in a young patient treated with multi-drug chemotherapy for primary seminomatous germ cell tumor 13 months earlier is reported. The short latency period from the beginning of therapy for primary germ cell tumor and the abrupt onset of leukemia with no identifiable prodrome bear similarities to podophyllotoxin-related leukemias.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-0584
    Keywords: Primary germ cell tumor ; Acute monocytic leukemia with unusual phenotype
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A case of acute monocytic leukemia with rearrangement of the immunoglobulin heavy-chain gene and strong cytoplasmic immunoglobulin expression in a young patient treated with multi-drug chemotherapy for primary seminomatous germ cell tumor 13 months earlier is reported. The short latency period from the beginning of therapy for primary germ cell tumor and the abrupt onset of leukemia with no identifiable prodrome bear similarities to podophyllotoxin-related leukemias.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-0584
    Keywords: Key words Acute myeloid leukemia ; Acute promyelocytic leukemia ; Treatment ; ATRA ; Arsenic trioxide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Arsenic trioxide has recently been introduced as a promising new agent to treat refractory acute promyelocytic leukemia (APL). In the present study, arsenic trioxide was given intravenously for 42 days to a 56-year-old female patient suffering from chemotherapy/ATRA-resistant APL, with 43% APL blasts in the bone marrow and elevated D-dimers. During the first days of arsenic trioxide treatment a rapid decrease in the D-dimers was seen (normal values reached until day 7), together with a slight decrease in peripheral blood leukocytes. This initial coagulation response was followed by a second phase of hematological response (starting on days 15–20) characterized by leukocytosis, occurrence of myeloid progenitor cells in the peripheral blood, and a decrease in bone marrow blasts (〈1% on days 28 and 36). Finally, the patient entered complete hematological and cytogenetic remission, although the PML-RARα fusion product was still detectable by PCR. These data confirm the therapeutic value of arsenic trioxide in relapsed/resistant APL.
    Type of Medium: Electronic Resource
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