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  • JCML (Juvenile Chronic Myelomonocytic Leukemia)  (1)
  • Technetium-99m methoxyisobutylisonitrile  (1)
Material
Years
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Hematology and cell therapy 39 (1997), S. 41-48 
    ISSN: 1279-8509
    Keywords: CMML (Chronic myelomonocytic leukemia) ; JCML (Juvenile Chronic Myelomonocytic Leukemia) ; Retinoids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Chronic myelomonocytic leukemia represents a distinct myelodysplastic syndrome in which an excess of monocytes is observed both in the blood and bone marrow of the patients. Whereas diagnosis is relatively easy, therapeutic design and efficacy is difficult and no treatment has to date provided complete or significant partial response. In vitro data suggest that the growth and differentiation of myelomonocytic progenitors may be altered inasmuch as monocytic or granulo-macrophagic colonies show spontaneous growth. Different entities may be observed: the childhood form, Juvenile Chronic Myelomonocytic Leukemia (JCML) shows in vitro a typical pattern with constitutive growth of only macrophagic colonies and hypersensitivity to GM-CSF; in the adult form at least two patterns may be observed one close to the JCML form and one more heterogeneous with absence of GM-CSF sensitivity and spontaneous growth of both CFU-GM and CFU-M colonies. Chemotherapy reduces all myeloid colonies in vitro whereas retinoic acid has a selective effect on monocytic colonies with a concomitant increase of CFU-G colonies forwarding an explanation for the correction of pancytopenia observed in some patients. Recent analysis of altered molecular pathways in this disease suggest a common disruption of intracelleular signalling pathways namely the Ras pathway and targetting for drugs with may selectively control or inhibit a constitutive activation may forward novel therapeutic perspectives.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1619-7089
    Keywords: Technetium-99m methoxyisobutylisonitrile ; Gallium-67 citrate ; Hodgkin's disease ; Non-Hodgkin's lymphoma ; Residual mas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The aim of this study was to compare the value of scintigraphy using technetium-99m methoxy-isobutylisonitrile (MIBI) with that of scintigraphy using gallium-67 citrate in the assessment of Hodgkin's disease and non-Hodgkin's lymphoma and to relate these results with those of CT scan and MRI. Fifty-eight patients were included either for a follow-up examination or for monitoring of their treatment. Twenty-three residual masses were studied. A whole-body scan was performed, followed by single-photon emission computed tomography (SPET) 20 min after injection of 740 MBq of99mTc-MIBI and 72 h after injection of 185 MBq of67Ga citrate. The overall sensitivity of99mTc-MIBI and67Ga citrate was 71% and 68%, respectively, and the overall specificity was 76% and 44%, respectively. For residual masses, the sensitivity was 44% with both tracers and the specificity was 80% with99mTc-MIBI and 53% with67Ga citrate. The positive predictive values were 85% and 68% and the negative predictive values were 59% and 44%, respectively. The signal-to-background ratio was 1.5 for99mTc-MIBI and 2 for67Ga citrate. At present,99mTc-MIBI cannot replace67Ga citrate in the assessment of lymphomas.
    Type of Medium: Electronic Resource
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