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  • 1
    ISSN: 1432-1963
    Schlagwort(e): Schlüsselwörter Trophoblast ; „Placental site trophoblastic tumor“ ; „Exaggerated placental site“ ; „Placental site nodule“ ; Zytokeratin ; β -HCG ; HPL ; Key words Placental ; Site trophoblastic tumors ; Exaggerated placental site ; Placental-site nodule ; Sytokeratin ; β -Human chorionic gonadotrophin ; Human placental lactogen
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Summary A placental-site trophoblastic tumor is a rare neoplasia that is derived from the cells of the intermediate trophoblast. Morphological, biochemical, and Doppler ultrasound findings are presented regarding differential diagnosis using material from three recent cases. Essentially, placental-site trophoblastic tumors can be diagnosed if infiltration of the myometrium is seen by a monomorphic trophoblastic proliferation that is not interrupted by decidual cells. Necrosis and hemorrhages are not features of placental-site trophoblastic tumors. However, there is a peculiar behavior towards the uterine vasculature as spiral arteries are dilated and transformed the same way as occurs at the site of physiological implantation of pregnancy. It appears that as a result of this phenomenon there is a characteristic finding in ultrasound. Examination of this type of tumor demonstrates cystic spaces that can be defined as blood vessels by their Doppler signal. In two of the three cases a hysterectomy was performed, and criteria for the assumption of malignant placental-site tumors are therefore presented. However, only the mitosis rate seems to possess some predictive value.
    Notizen: Zusammenfassung Beim „placental site trophoblastic tumor“ handelt es sich um eine seltene Neoplasie, die aus den Zellen des sog. intermediären Trophoblasten entsteht. Die vorliegende Arbeit präsentiert morphologische, laborchemische und dopplersonographische Befunde zur Differentialdiagnose anhand von 3 kürzlich beobachteten Fällen. Wesentlich für die Annahme eines „placental site trophoblastic tumor“ ist der Nachweis einer Infiltration des Myometriums durch eine monomorphe trophoblastäre Zellpopulation, die nicht von dezidualen Zellen unterbrochen wird. Nekrosen und Hämorrhagien größeren Ausmaßes fehlen im Bereich des infiltrativen Wachstums; stattdessen kommt die Umgestaltung und Aufweitung mütterlicher Spiralarterien zur Beobachtung, wie sie für die physiologische Implantationsregion bekannt ist. Aus diesem Phänomen scheint ein charakteristischer Ultraschallbefund zu resultieren: in der Uteruswand gelegene zystischen Herde weisen dopplersonographisch einen gefäßtypischen Blutfluß auf. Da in 2 Fällen anschließend der Uterus zur Untersuchung kam, werden auch Kriterien zur Annahme eines malignen Verhaltens des Tumors vorgestellt. Morphologisch scheint nur die Mitoserate in der Läsion einen gewissen prädiktiven Wert zu besitzen.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Archives of gynecology and obstetrics 256 (1995), S. 167-176 
    ISSN: 1432-0711
    Schlagwort(e): Key words: Photodynamic therapy ; Photosensitizers ; m-THPC ; Breast cancer ; In vitro ; Adenosine triphosphate cell viability assay
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract.  Background: Photodynamic therapy (PDT) might be of clinical value for patients with breast cancer with local recurrences or metastasis. However, there is a need for improved photosensitizers that are effective in combination with laser light and have few, if any, side-effects. We evaluated in vitro the effectiveness of a second generation photosensitizer by testing the influence of laser light on cell cultures of a human breast carcinoma cell line, incubated with meta-tetrahydroxyphenylchlorin (m-THPC) (=Temoporfin®). Experimental design: Five thousand MCF-7 cells were plated in 96-well plates. Forty-eight hours before laser treatment, the cells were plated to achieve a monolayer configuration. Twenty-four hours after plating, they were incubated with m-THPC. On day 6 after treatment with m-THPC we lysed the cells to extract the intracellular ATP that correlates with the number of living cells. The ATP-CVA was used to assess the cytotoxicity of the tested photosensitizer m-THPC at various concentrations and the relevant laser light alone prior to their combination after six days of culture. Results: We found a dose-response for m-THPC alone ranging from 2 to 16 µg/ml. The calculated inhibition concentration to produce 50% cell kill (IC50) was 4.55 µg/ml. We also observed a very low cytotoxicity for laser irradiation alone but a very strong cell kill for the combination of m-THPC together with laser light. Conclusions: PDT gave almost total cell kill at m-THPC concentrations that are not toxic in vitro.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Archives of gynecology and obstetrics 256 (1995), S. 167-176 
    ISSN: 1432-0711
    Schlagwort(e): Photodynamic therapy ; Photosensitizers ; m-THPC ; Breast cancer ; In vitro ; Adenosine triphosphate cell viability assay
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Background: Photodynamic therapy (PDT) might be of clinical value for patients with breast cancer with local recurrences or metastasis. However, there is a need for improved photosensitizers that are effective in combination with laser light and have few, if any, side-effects. We evaluated in vitro the effectiveness of a second generation photosensitizer by testing the influence of laser light on cell cultures of a human breast carcinoma cell line, incubated with meta-tetrahydroxy-phenylchlorin (m-THPC) (=Temoporfin®).Experimental design: Five thousand MCF-7 cells were plated in 96-well plates. Forty-eight hours before laser treatment, the cells were plated to achieve a monolayer configuration. Twenty-four hours after plating, they were incubated with m-THPC. On day 6 after treatment with m-THPC we lysed the cells to extract the intracellular ATP that correlates with the number of living cells. The ATP-CVA was used to assess the cytotoxicity of the tested photosensitizer m-THPC at various concentrations and the relevant laser light alone prior to their combination after six days of culture.Results: We found a dose-response for m-THPC alone ranging from 2 to 16 μg/ml. The calculated inhibition concentration to produce 50% cell kill (IC50) was 4.55 μg/ml. We also observed a very low cytotoxicity for laser irradiation alone but a very strong cell kill for the combination of m-THPC together with laser light.Conclusions: PDT gave almost total cell kill at m-THPC concentrations that are not toxic in vitro.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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