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  • Artikel: DFG Deutsche Nationallizenzen  (3)
  • 1990-1994  (3)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Virchows Archiv 424 (1994), S. 177-185 
    ISSN: 1432-2307
    Schlagwort(e): L-pyruvate kinase ; M2-pyruvate kinase ; Kidney neoplasms ; Carbohydrate metabolism ; Immunohistochemistry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Using immunohistochemical and enzyme biochemical methods we investigated the expression of L- and M2-pyruvate kinase (PK) in normal renal tissue, renal cell carcinomas (RCCs; of clear cell, chromophilic cell and mixed cell type) and RCC metastases. L-PK was expressed in the proximal tubules of normal renal tissue and, to a variable extent, in 23/25 primary RCCs, in 1 RCC recurrence and in 10 RCC metastases. Staining intensity and percentage of stained tissue did not correlate with tumour grade. One renal oncocytoma and all extrarenal malignancies examined lacked L-PK immunoreactivity. M2-PK was mainly expressed in the distal tubules of the normal kidney and was found in all renal tumours as well as extrarenal malignancies. Quantitative biochemical investigations yielded a two- to seventeen-fold increase in PK activity in RCCs compared to the normal renal cortex taken from the same patient, whereas fructose-1,6-bisphosphatase and cytosolic glycerol-3-phosphate dehydrogenase activity was dramatically lower in RCCs. Otherwise, the activity of all other enzymes investigated (glucose-6-phosphate dehydrogenase, enolase and lactate dehydrogenase) was not significantly changed in the RCCs. The immunocytochemical results suggest that L-PK is a useful marker for RCC and its metastases, if acetone-fixed tissue is available. The quantitative changes of the concentration of PK and other enzymes in RCCs when compared with normal renal tissue probably reflect metabolic alterations related to tumour growth.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Der Anaesthesist 43 (1994), S. 121-125 
    ISSN: 1432-055X
    Schlagwort(e): Schlüsselwörter: Fourniersche Gangrän – Sepsis – Schock ; Key words: Fournier's gangrene – Septic shock
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Abstract. Fournier's gangrene is a necrotising soft-tissue infection of the scrotum and perineal region caused by gram-negative and gram-positive Enterobacteriaceae. The disease is characterised by its unique appearance, its speed of onset, and its high mortality. Case report. A 26-year-old male presented to the emergency room complaining of a painful, tremendously swollen scrotum and penis (Fig. 1) that had developed within the past 24 h. Later, slurred speech, pallor, and hypotension were recognised, leading to the patient's admission to the intensive care unit. Suspecting a severe internal haemorrhage, vigorous volume therapy was started using crystalloids and colloids until blood and fresh frozen plasma were available. One hour later, septic shock was presumed and therapy augmented by IV antibiotics, tracheal intubation, and mechanical ventilation. Despite all efforts, the patients condition deteriorated rapidly and he died a few hours later due to multiple organ failure in septic shock. Postmortem, a perforated external hemorrhoidal node was found to be the primary focus of sepsis. Microbiologic cultures revealed Escherichia coli in blood and tissue samples. Discussion. Fournier's gangrene is a rare disease; nevertheless, its clinical picture has to be recognised immediately in order to provide appropriate treatment in time. It occurs predominantly in males after minor trauma, colorectal or urological disease, and perineal or abdominal surgery. Fournier's gangrene usually begins with itching and pain in the scrotal region followed by swelling and dark-blueish discolouration of the scrotum and penis, occasionally including the lower abdominal wall. Fever and chills are usually present. The illness progresses to severe prostration and septic shock with a mortality of 20% – 50%. Tissue cultures mostly reveal E. coli, gram-positive enterococci, Pseudomonas, Proteus, and various anaerobes. The treatment should include immediate radical surgical debridement, IV administration of broad-spectrum antibiotics, and cardiopulmonary support. Conclusion. The dramatic course of Fournier's gangrene requires early recognition, extensive surgical debridement, as well as intensive care treatment in order to prevent irreversible septic shock.
    Notizen: Zusammenfassung. Die Fourniersche Gangrän manifestiert sich meist bei Männern mittleren bis höheren Lebensalters als nekrotisierende Fasciitis des äußeren Genitales. Kennzeichnend sind eine typische Anamnese mit progredienter, schmerzhafter Hodenschwellung und Fieber, ein oft explosionsartiger Beginn, der kaum verwechselbare makroskopische Aspekt und die hohe Mortalität infolge septischer Komplikationen. Der unter Umständen dramatische Verlauf der Erkrankung erfordert ein invasives chirurgisches und intensivmedizinisches Vorgehen. Die Entscheidung hierzu setzt die rasche Diagnose des seltenen Krankheitsbilds voraus. Wir berichten über einen jungen Patienten mit Fournierscher Gangrän, der wenige Stunden nach Aufnahme ins Krankenhaus an einem foudroyant verlaufenden septischen Schock verstarb.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Magnetic resonance materials in physics, biology and medicine 1 (1993), S. 77-82 
    ISSN: 1352-8661
    Schlagwort(e): MR imaging ; fast imaging ; FLASH ; snapshot FLASH ; T1 mapping ; chemical shift selection ; T1 contrast ; quantitative MRI
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin , Physik
    Notizen: Abstract A new technique based on an inversion recovery (IR) snapshot FLASH MRI sequence is presented, which shows the possibility of combining T1 contrast and chemical-shift selectivity on the same images. The introduction of a CHESS preparation allows qualitative visualization of the T1 recovery of separate chemical species that may arise simultaneously within a given tissue. This kind of preparation also leads to a quantitative determination of T1 times of fat and water, even if both components are present in one image voxel. With this method, the inversion recovery behaviour of just one chemical compound can be visualized in a single experiment lasting a few seconds and quantitatively measured in a multishot experiment.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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