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Scanning electron microscopy in gallstone research.

U Wosiewitz

    Scanning Electron Microscopy
    |January 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    Gallstone formation involves inorganic or organic calcium salts acting as nuclei. Scanning electron microscopy with energy-dispersive X-ray analysis (SEM/EDXA) identified these microcalculi, revealing insights into gallstone development.

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    Area of Science:

    • Gastroenterology
    • Mineralogy
    • Biochemistry

    Background:

    • Gallstone formation (cholelithiasis) is a common condition.
    • The precise nucleation process of gallstones remains incompletely understood.
    • Identifying the initial components of gallstones is crucial for understanding their pathogenesis.

    Purpose of the Study:

    • To investigate the role of inorganic and organic calcium salts in gallstone nucleation.
    • To characterize the composition and structure of gallstone nuclei using advanced analytical techniques.
    • To correlate the composition of gallstone nuclei with their macroscopic appearance and radiographic density.

    Main Methods:

    • Scanning Electron Microscopy with Energy-Dispersive X-ray Analysis (SEM/EDXA) was the primary technique.

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  • Additional methods included X-radiography, X-ray diffraction, and Infrared (IR) spectroscopy.
  • Analysis was performed on 336 consecutive gallstone cases.

    • Main Results:

    • Radio-dense nuclei, composed of calcium phosphate and/or calcium carbonate microcalculi, were found in 20.3% of stones.
    • Cholesterol stones showed nidation by pigment microcalculi in 10 cases.
    • Pigment stones exhibited two structural types: granular (calcium bilirubinate) and glassy (potentially involving bilirubinate and other elements like copper, iron, and sulfur).

    Conclusions:

    • SEM/EDXA is effective for analyzing radio-dense nuclei in gallstones, even with small sample sizes.
    • Calcium-containing microcalculi and pigment structures play a significant role in gallstone nucleation and formation.
    • The composition of gallstone nuclei provides insights into the different types of gallstones observed.