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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatsschrift Kinderheilkunde 147 (1999), S. 346-350 
    ISSN: 1433-0474
    Keywords: Schlüsselwörter Myelosarkom ; Akute myeloische Leukämie (AML) ; Leucaemia cutis ; Hautinfiltration ; Key words Myelosarcoma ; Acute myeloid leukemia ; Aleukemic leukemia cutis ; Skin infiltration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Background: Isolated myelosarcoma of the skin in childhood is a rare manifestation of acute myeloid leukemia (AML) preceding bone marrow involvement by weeks to month. Results: During the studies of AML-BFM 87/93 for the treatment of acute myeloid leukemia an isolated myelosarcoma of the skin was diagnosed in eight patients aged 0.3 to 16 years. Histologically most cases were classified as monoblastic or myelomonocytic leukemia (FAB M5, n=5; FAB M4, n=4; FAB M0, n=1). Two infants, 3 and 6 month old remained in complete remission after being treated only by surgical or by oral cytostatic therapy. Two children treated according to the AML-BFM-schedule are in complete remission. Delayed performance of diagnostic procedures and the initially mild symptoms seemed to be the reasons for reduced treatment in the remaining cases. After first relapse all patients received intensive cytostatic treatment (AML-BFM 87/93), but all of them relapsed a second time. Three of these children died due to progressive disease after 21/2 to 31/2 years. Only one patient is in complete remission since 61/2 years. Conclusion: Suspect skin lesions should be considered as myelosarcoma preceding AML. Reduced treatment seems to be justified only for young toddlers without malignant bone marrow blasts. An early and intensive cytostatic treatment is recommended for all other children with isolated myelosarcoma of the skin.
    Notes: Zusammenfassung Hintergrund: Das isolierte Myelosarkom der Haut im Kindesalter ist eine seltene Manifestation der akuten myeloischen Leukämie (AML), die dem Nachweis der Leukämie im Knochenmark Wochen bis Monate vorausgehen kann. Studiendesign und Ergebnisse: In den AML-BFM 87/93-Studien zur Behandlung der akuten myeloischen Leukämie im Kindesalter wurden bei 8 Patienten (1,2%) im Alter von 3 Monaten bis 161/2 Jahren isolierte Myelosarkome der Haut diagnostiziert. Histologisch überwogen monoblastäre und myelomonozytäre Leukämiezellen (FAB M5, n=5; FAB M4, n=2; FAB M0, n=1). Während 2 Säuglinge, bei der Diagnose 3 und 6 Monate alt, nach lediglich lokaler chirurgischer Tumorexstirpation bzw. einer alleinigen oralen zytostatischen Therapie in anhaltender Vollremission verblieben, war dies bei den älteren Kindern (31/2–161/2 Jahre) nur bei den beiden gemäß AML-BFM-Studienprotokoll behandelten Patienten der Fall. Die verzögerte Diagnostik und die milde initiale Symptomatik führten bei den übrigen 4 Patienten zu einer reduzierten Initialbehandlung. Erst nach dem ersten Rezidiv erfolgte die intensive systemische Therapie (AML-BFM 87/93). Alle 4 Patienten erlitten ein 2. Rezidiv. 3 der Patienten verstarben 21/2–31/2 Jahre nach der Diagnose, 1 Patient befindet sich bei einer Beobachtungszeit von 61/2 Jahren in Vollremission. Schlußfolgerung: Bei außergewöhnlichen Hautinfiltrationen sollte das seltene Myelosarkom in die differentialdiagnostische Überlegungen einbezogen werden. Nur bei jungen Säuglingen mit solitärem Tumor ohne Knochenmarkbefall scheint eine abwartende Haltung gerechtfertigt zu sein. Für alle anderen Kinder wird eine frühzeitige intensive zytostatische Therapie empfohlen.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0584
    Keywords: Cytogenetic studies ; AML ; Prognostic value
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Between 1981 and 1986 cytogenetic studies of bone marrow and/or blood cells in 139 patients with de novo acute myeloid leukemia (AML) were performed. The overall incidence of chromosomal aberrations was 53%, and this was not significantly influenced by sex, age nor the FAB classification. The aberrations most often found were: complex anomalies (n=13), t(8; 21) (n=10), trisomy 8 (n=9), monosomy 7 (n=6), monosomy 5, 5q-, trisomy 11, 12p- (n=4) and trisomy 6, 11q-, inv [16] (n=3). The prognostic significance of chromosomal findings was evaluated in 112 patients treated by combination chemotherapy. The chromosomal status NN, AN, AA did neither significantly influence complete remission rate (NN: 68%, AN: 71%, AA: 60%) nor mean survival (NN: 24, AN: 26.6, AA: 35.6 months). On the other hand, certain types of chromosomal anomalies were of prognostic value. CR was obtained in all 10 patients with t(8; 21) but only in 2 out of 9 patients with complex aberrations. Median duration of CR in patients with t(8; 21) was significantly longer than in patients with a normal karyotype (30 vs 7 months).
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 32 (1992), S. 1372-1378 
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Polymer coatings are widely used to protect glass from indentation damage. A model for the strength degradation that occurs when a sharp indenter penetrates through the coating is developed by accounting for the indentation load shared by the coating and substrate. This model accounts for the additional load supported by the coating due to the pile-up of coating material underneath the indenter. The model predicts the strength degradation as a function of indentation load, coating and substrate hardnesses, and coating thickness. Comparison of the model to experimental data for a wide range of polymer coatings (two epoxies, epoxy acrylate, and urethane acrylate) on soda-lime glass substrates shows good agreement.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 32 (1992), S. 1366-1371 
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: For relatively soft polymer coatings on soda-lime glass substrates the indentation load increases substantially when the indenter penetrates into the glass substrate since the glass can now directly support some of the indenter load. A model for the indentation load-depth behavior is developed by accounting for the indentation load shared by the coating and substrate. This model accounts for the additional load supported by the coating due to the pile-up of coating material underneath the indenter. The model predicts the indentation behavior as a function of coating and substrate hardnesses and coating thickness. Comparison of the model to experimental data for a wide range of polymer coatings (two epoxies, epoxy acrylate, and urethane acrylate) on soda-lime glass substrates shows good agreement.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 71 (1999), S. 1038-1039 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 13 (1979), S. 251-263 
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: The fatigue behavior of alumina and bioglass-coated alumina was determined in air and biological test environments by the dynamic fatigue test technique in which strength is measured as a function of stressing rate. The good correlation found between the test data and fracture mechanics theory indicates that fatigue failure is controlled by the slow crack growth of preexisting flaws and that fracture mechanics theory can be used in making failure predictions for alumina and bioglass-coated alumina in biological environments. Thus, it is believed that lifetime predictions can be made for ceramic implants on the basis of short-term test data utilizing fracture mechanics principles.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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