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Related Experiment Videos

Enzyme histochemistry on normal and pathologic paraffin-embedded lymphoid tissues

M Chilosi, G Pizzolo, F Menestrina

    American Journal of Clinical Pathology
    |December 1, 1981
    PubMed
    Summary

    A new simplified paraffin embedding method allows for routine enzyme histochemistry on lymphoid tissues. This technique yields results comparable to cryostat sections for most enzymes, aiding in diagnosing lymphoid diseases.

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    Area of Science:

    • Histopathology
    • Enzyme Histochemistry
    • Lymphoid Disease Diagnostics

    Background:

    • Traditional enzyme histochemistry often uses fresh tissue imprints or cryostat sections, limiting routine histopathologic application.
    • Current methods are not easily integrated into standard histopathology workflows.

    Purpose of the Study:

    • To present a simplified tissue embedding procedure for routine enzyme histochemistry.
    • To evaluate the applicability of paraffin-embedded samples for enzyme demonstration in lymphoid tissues.

    Main Methods:

    • A simplified paraffin embedding technique using an automatic tissue changer.
    • Enzyme histochemical examination of paraffin-embedded lymphoid samples.
    • Comparison of results with formalin-fixed cryostat sections for multiple enzymes.

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    Main Results:

    • The simplified paraffin embedding procedure is compatible with routine histopathology.
    • Comparable enzyme activity was observed for alkaline phosphatase, alpha-naphthyl acetate esterase, acid phosphatase, tartrate resistant acid phosphatase, peroxidase, and chloroacetate esterase in paraffin and cryostat sections.
    • Adenosine triphosphatase (ATPase) activity could not be demonstrated in paraffin-embedded material.

    Conclusions:

    • The described paraffin embedding technique facilitates routine enzyme histochemistry in histopathology.
    • This method is broadly applicable for the analysis of normal and pathologic lymphoid samples.
    • It offers a practical approach for diagnosing lymphoid diseases using enzyme histochemistry.