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  • Bone marrow transplantation  (2)
  • Bone neoplasms  (1)
  • Burkitt's lymphoma  (1)
  • 1
    ISSN: 1432-2102
    Keywords: Schlüsselwörter Lymphom ; MRI ; Keywords Lymphoma ; Bone neoplasms ; Diffusion coefficient ; ADC
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Purpose. Skeletal manifestation of Non-Hodgkin's lymphoma is rare in pediatric patients. Objective of the study was to determine imaging features, before and after treatment, and to correlate these features with clinical outcome. Methods. A retrospective analysis of 1246 patients from two therapy studies (NHL-BMF-90 and 95) was performed. Imaging studies of 63 patients with bone involvement of lymphoma were reevaluated. Results. Incidence of initial bone involvement in Non-Hodgkin's lymphoma was 6.8%. Distribution was best assessed by bone scan, MRI revealed larger areas of marrow involvement and detected additional lesions. Sites of prediliction were long bones of the lower extremities with epiphyseal involvement in 39%. Residual signal alterations in MRI after succussful therapy remained in 71%. Osteonecrosis after therapy was a common finding. Clinical outcome war not correlated to the presence of bone involvement. Conclusions. Since clinical outcome is not effected by bone involvement in childhood NHL, value of screening may be limited. Knowledge of imaging characteristics is mandatory for inital evaluation of primary osseous lymphomas and symptomatic lesions as well as for therapy controlls.
    Notes: Zusammenfassung Fragestellung. Skelettale Manifestationen des Non-Hodgkin-Lymphoms sind selten. Ziel der Studie waren die Analyse charakteristischer Veränderungen in der Bildgebung vor und nach Therapie sowie die Korrelation mit dem Therapieerfolg. Methode. Die retrospektive Analyse von 2 Therapiestudien (NHL-BMF-90 und 95) schloss 1246 Patienten ein. Die bildgebenden Untersuchungen von 63 Patienten mit skelettalem Lymphombefall wurden reevaluiert. Ergebnisse. Die Inzidenz des initialen Skelettbefalls beim Non-Hodgkin-Lymphom lag bei 6,8%. Die Verteilung der Skelettherde wurde durch die Szintigraphie am sichersten erfasst, die MRT detektierte im Vergleich größere Markraumbeteiligungen sowie zusätzliche Herdbildungen im Skelett. Prädilektionsorte waren die langen Röhrenknochen der unteren Extremitäten mit epiphysärer Beteiligung in 39% der Fälle. Residuale Signalveränderungen im MRT verblieben trotz kompletter Remission in 71% der Fälle. Osteonekrosen nach Chemotherapie waren häufig. Die therapeutische Ergebnisse wurden durch das Vorhandensein eines Skelettbefalls nicht beeinflusst. Schlussfolgerungen. Aufgrund der Beobachtung, dass die Therapieergebnisse vom Nachweis eines Skelettbefalls nicht wesentlich beeinflusst werden, erscheint der Wert der Screeninguntersuchung begrenzt. Die Kenntnis des Erscheinungsbilds vom NHL in der Bildgebung ist aber für die Beurteilung der primär ossären Lymphome und symptomatischer Herdbildungen sowie in der Therapiekontrolle notwendig.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 151 (1992), S. S50 
    ISSN: 1432-1076
    Keywords: Acute lymphoblastic leukaemia ; Bone marrow transplantation ; Chemotherapy ; Risk factors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Twenty-five years ago over 90% of children with acute lymphoblastic leukaemia (ALL) died of this disease. Dramatic improvement has been achieved since then by employing risk-adapted, aggressive polychemotherapy protocols. More than 90% of children with ALL treated according to, for example BFM-protocols, have nowadays cure rates in the range of 70%–80%. However, 10% of patients do not initially respond adequately to standard induction chemotherapy. They are characterized by distinct chromosomal abnormalities such as translocation (9; 22) or combinations of early treatment failure and other risk factors as cytogenetic abnormalities, lineage-specific surface markers or tumour load at diagnosis. In this group of patients in first complete remission and certainly in the vast majority of relapsed patients, allogeneic bone marrow transplantation (BMT) has evolved as an alternative approach allowing further intensification of myeloablation and the introduction of an additional antileukaemic alloreactivity. Nevertheless, the decision for a marrow transplant in children has to be made very carefully because of a significant increase in treatment related mortality and BMT-specific risks like acute and chronic graft-versus-host disease with a critical iatrogenic chronic morbidity. This is even more evident, if mismatched or unrelated transplants are being considered. The indications for one or the other treatment modality according to the current BFM strategy are discussed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 79 (2000), S. 345-354 
    ISSN: 1432-0584
    Keywords: Key words Management ; Chronic myelogenous leukemia ; Autograft ; Allograft ; Bone marrow transplantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The management of chronic myelogenous leukemia (CML) has become complex due to the availability of improved diagnostic procedures and life-prolonging or even curative treatment strategies that are more successful the earlier they are applied in the course of the disease. This is true for allogeneic bone-marrow transplantation, treatment with interferon α (IFN) and Philadelphia-negative stem-cell collections for autografting. Outcome differs according to risk profiles of patients at diagnosis. In addition, molecular techniques for the detection of the BCR-ABL fusion gene or its products, such as the reverse-transcriptase polymerase chain reaction (PCR), Southern blot analysis, or fluorescence in situ hybridization, facilitate accurate diagnosis and the monitoring of residual disease. They allow the individualization of treatment such as early infusion of donor lymphocytes if molecular relapse is detected after allografting, or discontinuation of IFN in the presence of very low BCR-ABL transcript levels). The availability of real-time PCR devices further improves and accelerates the diagnosis and monitoring of residual disease. This article addresses recent developments in drug therapy and allografting, including treatment intensification with low-dose ara C or intensive chemotherapy followed by autografting, introduction of new drugs (such as homoharringtonine or tyrosine kinase inhibitor STI571), progress with unrelated donor transplantations, use of peripheral blood stem cells for allografting, and transplantation without myeloablative conditioning. Tradeoffs between the treatment options will be discussed in the context of the evidence-based guidelines for treating CML, as recently published by the American Society of Hematology. Finally, the new competence network on acute and chronic leukemias will be introduced.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1569-8041
    Keywords: Burkitt's lymphoma ; c-myc ; PCR ; translocations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Burkitt's lymphoma (BL) and B-ALL are characterized bychromosomal translocations juxtaposing the c-myc gene on chromosome 8to one of the immunoglobulin loci. Translocations involving the immunoglobulinheavy chain (IgH) on chromosome 14 are found in approximately75%–90% of these tumors. The breakpoint regions arelocated over a wide range on both chromosomes. Patients and methods: To detect the translocations, we developed aPCR method to generate long products. After extraction of genomic DNA (QiaAmpSystem,Qiagen, Hilden, Germany), DNA was amplified using a mixture of Taq andPwo polymerases (Boehringer Mannheim, Germany). Several primer pairs from theSµ, JH, CH1 and the Cα regions on IgH and from exon 1 and intron 1of the c-myc gene were tested in each patient. Results: Lymphoma cells from 20 children with Burkitt's lymphoma andB-ALL characterized by FAB-L3 morphology were examined. In 11/20 patients,recombinations between chromosomes 8 and 14 could be detected with our primerpairs. PCR products from 800 to 3700 bp in length were obtained reproducibly.After amplification, the products were characterized by restriction enzymedigestion, hybridization, and in part by direct sequencing. Conclusions: This PCR-based method will allow us (1) to determinethe localization of chromosomal breakpoints in primary tumor material, (2) toinvestigate whether distinct breakpoints are associated with treatmentoutcome, and (3) to detect the presence of minimal residual tumor cells duringor after therapy.
    Type of Medium: Electronic Resource
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