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Related Experiment Videos

[Structure of primary prostatic endogenous calculi].

C Torres Ramírez, J Aguilar Ruíz, A Zuluaga Gómez

    Archivos Espanoles De Urologia
    |November 1, 1979
    PubMed
    Summary
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    This study analyzed 62 prostate stones using crystallographic analysis. Apatite, a calcium phosphate, is the primary component in most stones, forming the nucleus and periphery structures.

    Area of Science:

    • Mineralogy
    • Urology
    • Crystallography

    Background:

    • Prostate stones, also known as prostatic calculi, are common in aging men.
    • Understanding their composition is crucial for diagnosis and treatment.
    • Previous studies have varied in their findings on prostate stone composition.

    Purpose of the Study:

    • To conduct a detailed crystallographic analysis of primary or endogenous prostate stones.
    • To describe the specific structural features of these calculi.
    • To identify the mineralogical components and their distribution within the stones.

    Main Methods:

    • Crystallographic analysis (fine plate) was performed on 62 prostate stones.
    • Microscopic examination focused on the nucleus and peripheral structures.

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  • Mineralogical composition was determined for each stone.

    • Main Results:

    • Apatite (primarily carbo-apatite) was the essential component in 98.38% of the stones.
    • Nuclei were composed of apatite, whitlockite, or mixtures.
    • Peripheries showed concentric, sometimes lobe-shaped layers, predominantly of apatite, often intercalated with whitlockite, oxalic, or uric acid layers.

    Conclusions:

    • Apatite is the predominant mineral in endogenous prostate stones.
    • The layered structure of the periphery, with apatite and whitlockite, is a common finding.
    • Variations in peripheral composition, including oxalic and uric acid, were observed.