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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 26 (1970), S. 763-765 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Following 2/3 hepatectomy + CCl4, the labelling- (3H-thymidine) and mitosis-index of liver epithelia increases 8 h later than after an unique 2/3 hepatectomy, and the peak of compensatory regeneration is reached 16 h later. Then the curve declines and 48 h post operationem reparative regeneration due to CCl4 necrosises starts.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 216 (1974), S. 235-255 
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 33 histologisch gesicherte Fälle von Uterussarkomen aus dem Krankengut der Universitäts-Frauenklinik Hamburg der Jahre 1953–1970 wurden nach klinischen und pathologisch-anatomischen Gesichtspunkten ausgewertet. In 19 Fällen handelte es sich um Leiomyosarkome verschiedener Differenzierung, in 11 Fällen um endometriale Sarkome und in 3 Fällen um Gefäßgeschwülste. Bei den Leiomyosarkomen betrug das Durchschnittsalter der Patientinnen 48 Jahre. Die Behandlung bestand in 17 von 19 Fällen in der Hysterektomie, 14mal mit postoperativer Strahlentherapie. 8 Patientinnen waren bis zu 15 Jahren rezidivfrei. Bei den reinen Schleimhautsarkomen betrug das Durchschnittsalter 51,5 Jahre, bei den gemischten endometrialen Sarkomen 63,5 Jahre. Die gemischten Schleimhautsarkome sind eine formenreiche Gruppe mit homologen (organspezifischen) und heterologen (organfremden) Gewebsanteilen. Die Prognose ist für alle endometrialen Sarkome als ungünstig anzusehen. Innerhalb der heterogenen Gruppe gibt es von der Art der Strukturkomponenten bestimmte Unterschiede im Malignitätsgrad. Extrem schlecht ist die Prognose bei den gemischten Schleimhautsarkomen. Rhabdomyoblasten und knochenbildende Elemente weisen auf äußerst malignes Verhalten hin, chondroplastische Tumoren zeigen im allgemeinen günstigere Verläufe. Für die Behandlung der Uterussarkome gilt als Methode der Wahl die radikale Chirurgie. Die Strahlenempfindlichkeit variiert anscheinend erheblich, abhängig von der feinstrukturellen Eigenheit und der Mitoserate. Die Leiomyosarkome und die gemischten mesodermalen Geschwülste sind außerordentlich strahlenresistent. Für Prognose und individuell angepaßte Therapie ist die präzise histopathologische Diagnose in der Routinediagnostik notwendig.
    Notes: Summary 33 histologically verified cases of uterine sarcomas encountered among the gynaecological admissions to the woman's hospital of the University of Hamburg between 1953 and 1970 have been analysed in a clinical and histopathological study. During this period 19 leiomyosarcomas of the uterus, 11 endometrial sarcomas and 3 angiosarcomas were registrated. The average age for leiomyosarcomas was 48 years. In 17 of the 19 cases the treatment consisted in hysterectomy followed by postoperative irradiation in 14 cases. 8 patients survived 15 years without recurrence. The average age for endometrical sarcomas was 51.5 years and 63.5 for mixed endometrial sarcomas. The mixed endometrial sarcomas show a wide variety of histological patterns including as well homologeous as heterologeous elements. Prognosis is bad for the entire group of endometrial sarcomas. The presence of specifically differentiated tissue components in mixed tumours is regarded as an important prognostic factor. Thus rhabdomyoblasts and osteoid tissue indicate a highly malignant tumour while chondromatous elements provide a better prognosis. Treatment of choice for all uterine sarcomas is radical surgery. The effect of irradiation depends on the histological type and the mitotic rate of the tumour. Both leiomyosarcomas and mixed endometrial sarcomas are highly resistant to irradiation. Therefore exact histopathological classification in routine diagnosis is of great importance for both individualized therapy and prognostic evaluation.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 217 (1974), S. 293-302 
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In der vorliegenden Arbeit werden anhand eines Hämangiopericytoms und eines Hämangioendothelioms des Uterus die Strukturmerkmale beider Tumorformen sowie die differentialdiagnostischen Kriterien zur Abgrenzung von anderen gefäßreichen Tumoren des Uterus (endolymphatische Stromatose, gefäßreiches Leiomyom) beschrieben. Für die Behandlung dieser Geschwülste gilt als Methode der Wahl die totale Uterusexstirpation unter Mitnahme beider Adnexe. Im Gegensatz zu den relativ strahlenresistenten Hämangiopericytomen scheinen die Hämangioendotheliome und die endolymphatischen Stromatosen gut auf Strahlentherapie anzusprechen. Die Prognose ist für die Hämangiopericytome als relativ günstig anzusehen. Bei den Hämangioendotheliomen kommt es meist frühzeitig zu Rezidiven.
    Notes: Summary Two vascular tumors of the uterus, hemangioendothelioma and hemangiopericytoma, were readily distinguishable from each other on the basis of their light microscopic characteristics. By comparing these tumors with other uterine neoplasmas with a prominent vascular component and by reviewing the present literature the following conclusions have been drawn: 1. In their light microscopic appearance the vascular tumors of the uterus completely resemble those found in other organs. There are a number of morphological criteria which usually allow differentiation of these tumors from proliferative endolymphatic stromatosis and from vascular leiomyomas. 2. The treatment of choice is total hysterectomy and bilateral salpingo-oophorectomy. It seems likely that hemangiopericytomas are relatively radio-resistant. The hemangioendothelioma and the proliferative endolymphatic stromatosis on the contrary usually respond very well to radiotherapy. 3. The recurrence rate of these three tumors ist varying considerably. Hemangioendotheliomas are characterized by early recurrence in over 50%, while endolymphatic stromatosis has a recurrence rate of about 20%. Likewise hemangiopericytomas seldom recur or metastasise.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 361 (1973), S. 307-319 
    ISSN: 1432-2307
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Meerschweinchen mit einer experimentell induzierten Thyreoiditis wurde über einen Zeitraum von 12 Tagen täglich Thyreoglobulin, emulgiert in incomplettem Freundschem Adjuvans, injiziert. Neben licht- und elektronenmikroskopischen sowie immunhistochemischen Studien wurden Untersuchungen zur Überempfindlichkeit vom Spättyp an Hand von Hauttesten durchgeführt. Weiterhin wurde bei allen Tieren der Serum-Antikörpertiter gegen Thyreoglobulin bestimmt. Folgende Ergebnisse wurden erzielt. 1. Eine spezifische Desensibilisierung durch homologes oder heterologes Thyreoglobulin führte bei den Versuchstieren mit experimenteller Thyreoiditis zu einem fast vollständigen Rückgang der Entzündung innerhalb der Schilddrüse. 2. Das Fortbestehen stimulierter Follikelepithelien und toxisch-degenerativer Veränderungen in den Schilddrüsen desensibilisierter Tiere wurde als Hinweis für die vorausgegangene Entzündung gedeutet. 3. Zwischen dem Vorhandensein einer Thyreoiditis und der Überempfindlickeit vom verzögerten Typ (Hauttest) besteht in allen Untersuchungsgruppen eine deutliche Korrelation. Eine solche Korrelation ließ sich nicht zwischen Thyreoiditis und Antikörpertiter nachweisen. Die Befunde stützen die Hypothese, daß die celluläre Immunität für das Zustandekommen der experimentellen Thyreoiditis den wesentlicheren Faktor darstellt. Die Mechanismen, die zur Desensibilisierung führen, werden in der vorliegenden Arbeit diskutiert.
    Notes: Summary Guinea pigs with experimental allergic thyroiditis, induced by three intradermal injections of thyroglobulin in complete Freund's adjuvant, were treated by daily injections of thyroglobulin emulsified in incomplete Freund's adjuvant over a period of 12 days. Besides lightmicroscopical, ultrastructural and immunohistochemical studies the serum antibody titers were determined and skin tests for delayed hypersensitivity were performed in all animals. The following results were obtained. 1. Specific suppression of experimental thyroiditis by homologeous or heterologeous thyroglobulin resulted in almost complete absence of the inflammatory infiltrate in the thyroid glands. 2. The cellular hyperactivity and the toxic-degenerative changes of the thyroid cells were still present in the desensitized animals. These changes were regarded as residues of the former inflammation of the glands. 3. There was a good correlation between the presence of thyroiditis and delayed hypersensitivity in all animals. Such a correlation was not apparent between thyroiditis and antibody titers. The data, presented in this study, further support the role of cellular immunity in the pathogenesis of experimental allergic thyroiditis. The mechanism by which the suppressive effect is mediated is discussed.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 42 (1974), S. 181-191 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the present study a histochemical and an immunocytochemical method have been employed for the demonstration of alkaline phosphatase in the duodenum of different species at light and electron microscopic level. The commercially obtained intestinal alkaline phosphatase from the calf, which was used for the production of specific antiserum, was investigated by immunodiffusion, immunoelectrophoresis and polyacrylamide gel electrophoresis. For immunocytochemical demonstration of the enzyme a triple-layer-PAP-method has been used. Both methods employed showed identical distribution patterns of the enzyme within the enterocytes while in goblet cells the antigen could only be demonstrated by immunochemistry. Our findings are discussed with special reference to the role of the Golgi field and the function of the goblet cells.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 155 (1974), S. 525-540 
    ISSN: 1432-0878
    Keywords: Thyroid (Golden hamster) ; Perifollicular mesenchyme ; Intrathyroidal-vessels ; Lymph sinuses ; Ruthenium red, ATP-ase activity, Horseradish peroxidasetracing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The investigations were performed on thyroid glands of normal and acutely TSH-stimulated golden hamsters weighing 60–80 g. A fully expanded mesenchyme was only observed after perfusion of the gland with a fixative. Morphometric analysis of semithin sections revealed an area density of about 50% for parenchyma, 14% for intraepithelial capillaries, 20% for perifollicular vessels and about 5% for extravascular mesenchyme. There was no striking difference between normal and TSH-stimulated thyroid glands in regard to the structure of the perifollicular mesenchyme. An electron-dense lining was observed at the inner surfaces of blood and lymph vessels after staining of the tissue by ruthenium red and alcian blue. The lymphatics exhibit morphological features of perifollicular lymph sinuses. Most of the thyroidal blood vessels are intraepithelial capillaries which are characterized by a fenestrated endothelium. Using cytochemical techniques for the demonstration of ATP-ase activity and horseradish peroxidase a perifollicular diffusion space can be demonstrated which is characterized by long cytoplasmic processes of both endothelial and extravascular mesenchymal cells. These cells show micropinocytotic uptake of horseradish peroxidase as well as a striking activity of ATP-ase. Sometimes the tracer can be observed in the lumina of thyroidal follicles suggesting that the follicular lumen can be regarded as a special compartment of the interstitium. The observations are discussed and correlated with the release of thyroidal hormones and thyroglobulin.
    Type of Medium: Electronic Resource
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