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  • Inorganic Chemistry  (2)
  • DIFFERENCE  (1)
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  • 1
    Keywords: CANCER ; tumor ; carcinoma ; CELL ; Germany ; CT ; imaging ; DISEASE ; DIFFERENTIATION ; TISSUE ; computed tomography ; SURGERY ; PATIENT ; primary ; MRI ; MAGNETIC-RESONANCE ; magnetic resonance imaging ; NO ; DIFFERENCE ; NUMBER ; METASTASIS ; metastases ; REGION ; REGIONS ; DISSEMINATED TUMOR-CELLS ; adenocarcinoma ; COMPUTED-TOMOGRAPHY ; CELL CARCINOMA ; renal cell carcinoma ; pancreas ; ENHANCEMENT ; methods ; multidetector CT ; RENAL-CELL
    Abstract: Aims: To investigate the characteristics of metastasis to the pancreas using computed tomography (CT) and magnetic resonance imaging (MRI). Methods: Twenty-two patients with metastases to the pancreas were examined preoperatively by MRI (7/22) and/or multidetector CT (15/22). Pre- and post-contrast images were acquired and morphology, size, and contrast enhancement of the tumor analyzed. Subsequently, all patients underwent surgery, and the histopathologic findings were compared with the imaging results. Results: In 22 patients, a total of 29 metastases were found on CT and MRI. These metastases originated from renal cell carcinomas (RCC; 22/29), colorectal carcinoma (3/29), and other malignancies (4/29). The metastases differed not in size or location, but in their contrast enhancement characteristics. RCC metastases had either intense homogeneous enhancement (in small lesions) or rim enhancement (in large lesions). Outer regions of colorectal metastases showed no difference from normal pancreatic tissue, whereas the inner area showed hypo-enhancement due to central necrosis. Conclusion: Imaging features of metastases from RCC point to their primary origin. While they can be distinguished from primary adenocarcinoma of the pancreas, differentiation from endocrine carcinoma might be difficult. Differentiation of colorectal carcinoma remains to be investigated on larger numbers of cases. Copyright (C) 2008 S. Karger AG, Basel and IAP
    Type of Publication: Journal article published
    PubMed ID: 18434757
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  • 2
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: StableMercury(1) Nitrogen Compounds. IV. Synthesis a n d Crystal Structure of 1,4-Diazine Dimercury(I) DinitrateThe product of the reaction of solutions of mercury(I) nitrate and 1,4-Diazine in water, [C4H4N2Hg2](NO3)2, crystaIlises rhombic (a = 1936(2), b = 1540(1), c = 686(1) pm) in the space group Cmca with Z = 8. The x-ray structure has been determined using PATTERSON and FOURIER syntheses and refined by least squares to an R value of 0.046. The results show that the compound exists as bent chains of \documentclass{article}\pagestyle{empty}\begin{document}${}_\infty ^1 \left[{ - \mathop {\rm N}\limits^ \oplus {\rm C}_{\rm 4} {\rm H}_{\rm 4} \mathop {\rm N}\limits^ \oplus - {\rm Hg} - {\rm Hg} - } \right],$\end{document} with the nitrate anions occupying positions between the chains.
    Notes: Das durch Umsetzung von Pyrazin mit Quecksilber(I)-nitrat aus wäßrigen Lösungen erhaltene [C4H4N2Hg2](NO3)2 kristallisiert rhombisch (a = 1936(2) pm, b = 1540(1) pm, c = 686(1) pm) in der Raumgruppe Cmca rnit Z = 8. Die Struktur wurde rontgenographisch mit Hilfe von PATTERSON- und FouRIER-Synthesen bestimmt und nach der Methode der kleinsten Fehlerquadrate bis zu einem R-Wert von 0,046 verfeinert. Die Substanz ist aufgebaut aus gewinkelten Ketten \documentclass{article}\pagestyle{empty}\begin{document}${}_\infty ^1 \left[{ - \mathop {\rm N}\limits^ \oplus {\rm C}_{\rm 4} {\rm H}_{\rm 4} \mathop {\rm N}\limits^ \oplus - {\rm Hg} - {\rm Hg} - } \right],$\end{document} zwischen denen die Nitrat-Ionen liegen.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Stable Mercury(I)-Nitrogen Compounds. VI. Synthesis and Crystal Structure of Bis(chinoline)Dimercury(I) DinitrateThe product of the reaction of aqueous solutions of mercury(I) nitrate and chinoline, Bis(chinoline)dimercury(I) dinitrate, [C18H14Hg2N2](NO3)2, crystallizes monoclinic (a = 1 062.8(9) pm; b = 1 021.9(8) pm; c = 1 823.6(15) pm; β = 100.35 ± 0.06°) in the space group C2/c—C2h6 (Nr. 15) with Z = 4. The X-ray structure has been determined using Patterson and Fourier syntheses and refined by least squares to an R value of 0.091.The results show that the compound exists as a group structure of — units with the nitrate anions occupying positions between the groups.
    Notes: Das durch Umsetzung von Chinolin mit Quecksilber(I)-nitrat aus wäßrigen Lösungen erhaltene [C18H14Hg2N2](NO3)2 kristallisiert monoklin (a = 1 062,8(9) pm, b = 1 021,9(8) pm, c = 1 823,6(15) pm, β = 100,35 ± 0,06°) in der Raumgruppe C2/c—C2h6 (Nr. 15) mit Z = 4. Die Struktur wurde röntgenographisch mittels Patterson- und Fourier-Synthesen gelöst und nach der Methode der kleinsten Fehlerquadrate bis zu einem R-Wert von 0,091 verfeinert.Die Substanz ist aufgebaut aus isolierten []-Gruppen, zwischen denen die Nitrationen liegen.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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