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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 381 (1979), S. 189-203 
    ISSN: 1432-2307
    Keywords: Pseudomalignant ossifying myositis ; Ultrastructure ; Myofibroblasts ; Macrophages ; Pathogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Seven cases of pseudomalignant ossifying myositis with a typical clinical symptomatology have been reported. None of the cases had experienced an injury. All the lesions were intramuscular and all of them showed a zonal arrangement. Electron microscopy in three cases allowed the demonstration of cells showing morphological features of myofibroblasts and monocytic cells of the macrophage type. These previously unreported features together with the zonal pattern of the lesions indicate their reparative nature.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 374 (1977), S. 303-316 
    ISSN: 1432-2307
    Keywords: Ewing's tumour ; Ultrastructure ; Histochemistry ; Histogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Tumour tissue surgically excised from 10 patients bearing Ewing's tumour of bones was examined electron microscopically and histoenzymologically. In all cases the tumour was composed of polygonal cells with cytoplasm poor in organelles but with conspicuous aggregates of glycogen particles. There were numerous intercellular connections of desmosomal type and a distinct cell membrane bound positivity for alkaline phosphatase activity. In two cases in which there was a negative reaction for alkaline phosphatase, the lack of enzyme activity might have been related to cytotoxic treatment carried out for several months immediately before excision of the tissue used for histoenzymological studies. The problem of histogenesis of Ewing's tumour remains unresolved although some of the present findings support a haemangiogenic origin of the tumour.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 393 (1981), S. 233-244 
    ISSN: 1432-2307
    Keywords: Adamantinoma of long bone ; Ultrastructure ; Histogenesis ; Mesodermal or mesectodermal origin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Electron microscopic examination of three adamantinomas of long bones revealed structures usually observed in both mesenchymal and epithelial tumours. Tumour cells showing high alkaline phosphatase activity frequently tended to line clefts in connective tissue, resembling endothelial cells. The long processes of such cells showed fenestration. In areas showing fibre production the tumour cells were in close relationship to collagen fibrils. The latter were found, together with microfibrils, between the processes and above the basement membranes. The tumour cells were interconnected by desmosomes with tonofilaments and contained numerous bundles of microfilaments. All three cases revealed tiny intracytoplasmic inclusions resembling Weibel-Palade endothelial bodies. In addition, some of the structures in the lumena contained definite acid mucosubstances. A squamous cell pattern was present in only one of the three specimens. The coincidence of divergent structures in a single specimen has led us to the conclusion that the so-called adamantinoma of long bone might be possibly related to tumours of mesodermal or mesectodermal origin.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 93 (1979), S. 169-184 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei Patienten mit malignen Tumoren in der Schulterregion kann durch radikale Resektion eine Amputation fast immer umgangen werden. Zur Funktionsverbesserung des operierten Arms ist die Implantation einer Endoprothese wünschenswert. Es wurde eine 3teilige Endoprothese aus einem biokeramischen Material (Aluminiumoxid) entwickelt, die ohne Knochenzement implantiert wird. Eine feste Verankerung im Knochen wird durch Verwendung einer konischen Hülse, die auf dem vorher konisch zugearbeiteten Oberarmschaft befestigt wird, ermöglicht. Ein stabiler Primärsitz ist immer möglich. Das späatere Einwachsen in Rillen innerhalb der konischen Hülse verankert die Endoprothese dauerhaft. Die Autoren haben bisher in 38 Fällen Endoprothesen implantiert. Als Grunderkrankung fanden sich primär maligne Knochentumoren bei 19 Patienten, 1 Patient mit „solitärem” Plasmozytom und Metastasen im proximalen Humerus bei 16 Patienten. Bei 2 Frauen erfolgte die Operation wegen posttraumatischer, subkapitaler Humeruspseudarthrose. Die Nachuntersuchungsstudie enthält nur jene 27 Fälle, bei denen der Beobachtungszeitraum mindestens 1 Jahr beträgt. 12 der 14 Patienten mit primär malignen Knochentumoren iiberleben derzeit zwischen 12 und 55 Monaten (durchschnittlich 27,4 Monate) ohne Anzeichen von Metastasen oder Lokalrezidiven. 7 Patienten mit Metastasen starben nach durchschnittlich 7,7 Monaten an ihrer Grunderkrankung.
    Notes: Summary In patients with malignant tumors in the region of the shoulder, radical resection can avoid amputation in most instances. To improve the function of the arm, endoprosthetic replacement of the defect is desirable. A three-component endoprosthesis made of a bioceramic material (aluminium oxide) was designed, implanted without bone cement. Fast anchorage to bone is achieved by using a conical sleeve, fixed upon the previously conically reamed humerus shaft. A stable primary fit is always feasible. Subsequent bone in-growth into grooves inside the conical sleeve provides a permanent anchorage of the endoprosthesis. The authors experiences are based on implantations of 38 endoprostheses. The original diseases were primary malignant bone tumors in 19 patients, one case of “solitary” plasmocytoma and metastases into the proximal humerus in 16 patients. In two women, resection was made because of posttraumatic subcapital humeral pseudarthrosis. The follow-up study includes only those 27 cases operated on at least one year ago. 12 of the 14 patients with primary tumors have been surviving for 12–55 months (range 27.4) without signs of metastases or recurrent disease. Seven patients with metastases died of their original diseases after 7.7 months on the average. Owing to extensive resection of the shoulder musculature the mobility in the shoulder joint is considerably reduced. All the patients have good movement of the elbow joint and free function of the hand.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 109 (1990), S. 89-93 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary One hundred and forty consecutive DSA examinations of various musculoskeletal diseases were analyzed with respect to the contributions and/or limits of this modern diagnostic imaging modality. Angiography remains the imaging tool of choice for many benign and malignant orthopedic conditions of bones and soft tissues, mainly when MRI is still not generally available. It remains indispensable for embolization and/or local chemotherapy. DSA has the advantage of being less invasive and it also surpasses analog arteriography in better visualization of vascular patterns hidden in hyperostosis, sclerosis, and metallic shadows. Angiographic investigations, when necessary, should therefore start with DSA.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 85 (1976), S. 279-287 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In einer interklinischen Studie werden 126 Fälle von kindlichen Osteosarkomen analysiert. Es findet sich eine zunehmende Häufigkeit bis zum 15. Lebensjahr bei geringem Überwiegen des männlichen Geschlechtes. Das kindliche Osteosarkom bevorzugt den distalen Femur, die proximale Tibia und den proximalen Humerus. Die Behandlung wurde — bedingt durch die verschiedenen Kooperationszentren — uneinheitlich durchgeführt. Überlebende finden sich in allen Altersgruppen. Multiple Metastasen — meist in den Lungen, aber auch im Skelet — treten gehäuft innerhalb des 1. Jahres und fast immer innerhalb der ersten 2 1/2 Jahre nach Diagnosestellung auf. Zur Prognosebeurteilung genügt daher die 21/2-Jahres-Grenze. Die anscheinend besseren Ergebnisse nach frühzeitiger Amputation lassen diese Methode beim kindlichen Osteosarkom empfehlenswert erscheinen. Mit der alleinigen Strahlentherapie konnten keine Heilungen erzielt werden. Zusätzlich zur frühzeitigen Radikalbehandlung läßt die intensive prophylaktische Chemotherapie bessere Resultate erwarten.
    Notes: Summary 126 osteosarcoma under the age of 15 years are followed up in an interclinical study. There is a steady increase of tumor incidence towards the 15th year with a slight male preponderance. The main sites of the tumor are the distal femur followed by the proximal tibia and humerus. Evidence of multiple metastases is most often present in the lungs, less often in the skeleton. Nearly always metastases became evident within 2 1/2 years after diagnosis (98%). Therefore the 2 1/2-year disease—free survival rate seems to be sufficient for prognostic evaluation. The over all 2 1/2-year survival rate was 17,5%. Though the different methods of treatment are not statistically valid, the best results can be expected after early amputation. By radiotherapy alone no cure has been achieved. Survivals were seen at any age and at any site of long bones (distal femur, proximal tibia, humerus, femur, distal radius). Prognosis of osteosarcoma in the childhood is similar to that of the adult group.
    Type of Medium: Electronic Resource
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