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  • Liver  (2)
  • Urothelial atypia  (2)
  • 1
    ISSN: 1432-2307
    Schlagwort(e): Urothelial atypia ; Carcinoma ; Cell kinetics ; Immunohistochemistry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Results of cell kinetic analyses on transurethrally obtained material from urinary bladder are compared with parallel immunohistochemical tests on carcinoembryonic antigen (CEA) and tissue polypeptide antigen (TPA), performed on the same material. Labelling index increases from 1.4% in slight to 20% in marked urothelial atypia. CEA reaction in slight atypia is slight or moderate, slight, moderate or distinct in atypia, and moderate to distinct in carcinoma in situ. TPA always shows moderate to distinct reactions. Cell kinetically, urothelial carcinomas mas yield similar gradations. They were positive for CEA in 70% and for TPA in 100%. In G0 and GI carcinomas, negative and slightly positive reactions predominate, poorly differentiated lesions yield predominantly distinct reactions. In all grades, TPA ranges from slight to distinctly positive. As in cell kinetic analyses, there is a relationship between differentiation grade and stage for CEA expression. This does not apply for TPA. The results permit us to draw conclusions on the different biological and histogenetical behavior of urothelial carcinomas. There are undoubtedly differences in the behavior of papillary-exophytical and solid invasive carcinomas in terms of both cell kinetics and immunohistochemistry.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Research in experimental medicine 171 (1977), S. 1-12 
    ISSN: 1433-8580
    Schlagwort(e): Thermonecrosis ; Liver ; Wound healing ; Autoradiography
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Histological and autoradiographical studies were performed on the liver of rats after local thermonecrosis. The results were compared with those after local cryonecrosis. After thermocoagulation (740°C/4 sec) each animal received an i.p. injection of3H-TdR (2.5 µC/1 g body weight). The survival times ranged from 12 hours to 30 days. In the HE stained histological slides the morphological changes and the percentages of the cells in the granulation tissue and in the stripping film autoradiograms the percentages of radio-actively labeled fibroblasts and hepatocytes were determined. After 12–24 hours the thermonecrosis is complete with leucocytic demarcations. Five days later widespread granulation tissue develops in the marginal zone of the necrosis. 20 to 30 days after thermocoagulation small necrotic parts are still seen in the center surrounded by a fibrous scar. Autoradiographically the highest percentages of labeled epithelial and mesenchymal cells are observed between the second and the third postoperative day. Four weeks after thermonecrosis there are still increased cellular proliferative activities. Therefore, it can be stated that the inflammatory resorptive woundhealing processes following thermonecrosis in the liver are maintained much longer than after other physical injuries especially after cryonecrosis.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Research in experimental medicine 176 (1979), S. 143-156 
    ISSN: 1433-8580
    Schlagwort(e): Liver ; Ductus choledochus ligation ; Woundhealing ; Cryonecrosis ; Leber ; Ductus-choledochus-Unterbindung ; Wundheilung ; Wundheilung ; Kryonekrose
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Die Wundheilung fokaler Kryonekrosen an der biliärobstruktiv geschädigten Leber nach Ductus-choledochus-Unterbindung wurde zellanalytisch und zellkinetisch untersucht und mit den Resultaten an der nicht vorgeschädigten Leber verglichen. Die umschriebene Kryonekrose wurde durch eine Kyrosonde bei −196°C über 30 s an der Leber gesetzt. Bei der Zellanalyse des Granulationsgewebes wurden die Prozentsätze von Leukozyten, Monozyten, Makrophagen, Lymphozyten, Fibroblasten und Fibrozyten untersucht. Ferner wurden zellkinetisch die Prozentsätze3H-Thymidin-markierter Wundfibroblasten im Granulationsgewebe sowie in Randzonen an der Nekrose die Markierungsindices der Hepatozyten, Sternzellen und Gallengangsepithelien bestimmt. Die postoperativen Versuchszeiten betrugen 12 h bis 4 Wochen. Die morphologischen Stadien der Entwicklung einer Kryonekrose und ihrer Abheilung in der ungeschädigten und der durch Ductus-choledochus-Unterbindung geschädigten Leber zeigen übereinstimmend, daß nach 3–4 Wochen das kryonekrotische Gewebe weitgehend resorbiert ist und durch ein Narbengewebe ersetzt wird. In der cholostatisch vorgeschädigten Leber entwickeln sich eine stärkere Makrophagenaktivität und eine ausgeprägte Gallengangsproliferation. Für alle untersuchten epithelialen und mesenchymalen Zellen finden sich zellkinetisch die Proliferationsmaxima im Bereich der Kryonekrose zwischen dem 2. und 3. Versuchstag. Die reparative Regeneration nach in situ-Gefrierung der durch Ductus-choledochus-Unterbindung geschädigten Leber ist ebenso wie in der ungeschädigten Leber auf eine sehr schmale Parenchymzone in der unmittelbaren Nachbarschaft der Kryonekrose begrenzt. Das entfernt von der Kryonekrose liegende Lebergewebe zeigt keine wesentlichen Reaktionen auf den Kryodefekt. Der zellkinetische und zellanalytische Vergleich hat ergeben, daß ein einmaliger kryochirurgischer Eingriff nicht zu einer nennenswerten Verzögerung oder Beeinträchtigung der Wundheilung in der biliär-obstruktiv geschädigten gegenüber der nicht vorgeschädigten Leber führt.
    Notizen: Summary Histological and autoradiographic studies were performed to investigate and to compare the woundhealing of focal cryonecroses in the normal liver and the liver after ligation of the ductus choledochus. Four weeks after ligation of the ductus choledochus a small area of the liver tissue was frozen for 30 s at a temperature of − 196°C utilising a cryoprobe. The animals were sacrified of various intervals lasting from 12h to 4 weeks. In the developing granulation tissue a cell analysis was done and the percentages of leucocytes, monocytes, macrophages, lymphocytes, fibroblasts and fibrocytes were determined. In the autoradiograms the percentages of radioactively labeled fibroblasts, Kupffer cells, hepatocytes and bile duct cells were computed. There are no significant differences in the morphologic picture of the cryonecrosis in the liver with and without biliary obstruction. 3–4 weeks after in situ freezing the cryonecrotic tissue has been resorbed and only a small connective tissue scar is now visible. However, in the granulation tissue of the liver with biliary obstruction stronger macrophage activities and bile duct proliferations develop. Cellkinetically the different kinds of epithelial and mesenchymal cells show maximal values of DNA synthesis after in situ freezing between the 2nd and 3rd postoperative days. The increased reparative regeneration, however, is located only in the small tissue area in the vicinity of the cryonecrosis. These cellanalytical and cellkinetic investigations have shown that a single cryosurgical lesion in the liver which is comparable to a diagnostic wedge excision during cholecystectomy induces no noteworthy changes in the dynamics of the woundhealing of the liver with and without biliary obstruction.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Journal of cancer research and clinical oncology 109 (1985), S. 46-54 
    ISSN: 1432-1335
    Schlagwort(e): Urothelial bladder cancer ; Urothelial atypia ; Histology ; Cellkinetic ; DNA Cytophotometry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary For early diagnosis of urinary bladder tumors, autoradiographic, cytological, and impulse cytophotometric examinations were performed on fresh bladder tissue with carcinomas of different grades of malignancy and various depths of infiltration, and also on tissues with concomitant urothelial atypias. Cell kinetic examinations of urothelial atypias of mild, moderate, and severe grade revealed labeling indices comparable to those of urothelial carcinomas grade I, II, and III, respectively. The labeling indices of the carcinomas increased with both the grades of malignancy and the depth of invasion up to factor 5. Cytophotometrically mild atypias showed euploidy, while moderate to severe atypias revealed aneuploidy. By means of cytologic, cytophotometric, and cell kinetic analyses, two subgroups of G I urothelial carcinomas were distinguished. Subgroup I a corresponded to highly differentiated papillary urothelial carcinomas with low labeling indices, pap I-III differentiation, and euploidy. Subgroup I b, on the other hand, revealed pap differentiations of IV-V, aneuploidy, and higher labeling indices. This subgroup seems to be more prone to recurrences and apparently indicates higher grades of malignancy and depths of infiltration. The data presented provide evidence that a combination of these methods is helpful for early recognition of precursors of bladder cancer atypias as well as for exact evaluation of the biological potential of carcinomas.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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