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Nucleolar abnormalities in human papillary thyroid carcinomas.

M A Sobrinho-Simões, V Gonçalves

    Archives of Pathology & Laboratory Medicine
    |December 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

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    Electron microscopy revealed significant nuclear changes in papillary thyroid carcinomas. These alterations suggest a disturbed RNA metabolism is involved in thyroid cancer development.

    Area of Science:

    • Oncology
    • Cell Biology
    • Pathology

    Background:

    • Papillary thyroid carcinoma (PTC) is the most common type of thyroid malignancy.
    • Understanding the ultrastructural changes in PTC nuclei is crucial for diagnosis and treatment.
    • Previous studies have indicated potential alterations in nuclear components, but detailed ultrastructural analysis is ongoing.

    Purpose of the Study:

    • To investigate the ultrastructural morphology of nuclei in occult and common papillary thyroid carcinomas.
    • To identify specific nuclear features associated with PTC.
    • To explore the potential role of RNA metabolism in the pathogenesis of PTC.

    Main Methods:

    • Electron microscopy was used to examine the nuclei of 17 papillary thyroid carcinoma samples (both occult and common types).

    Related Experiment Videos

  • Detailed analysis of nuclear components, including interchromatin granules and nucleoli, was performed.
  • Identification of specific ultrastructural abnormalities within the nuclei.

    • Main Results:

    • Numerous clusters of large interchromatin granules were observed in most studied nuclei.
    • Some tumors exhibited nucleoli with a microfibrillar cortex and segregated components.
    • Altered nucleoli and nuclear bodies contained dense RNA-containing microspherules.

    Conclusions:

    • The observed ultrastructural features, particularly the presence of interchromatin granules and RNA-rich microspherules, suggest significant nuclear alterations in PTC.
    • These findings support the hypothesis of a disturbed RNA metabolism in human papillary thyroid carcinomas.
    • Further research into nuclear ultrastructure may provide novel diagnostic or therapeutic targets for thyroid cancer.