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Related Experiment Videos

Solid cell nests of the thyroid.

H R Harach1

  • 1Department of Radiotherapy and Oncology, Helsinki University Central Hospital, Finland.

The Journal of Pathology
|July 1, 1988
PubMed
Summary
This summary is machine-generated.

Solid cell nests (SCN) are thyroid structures composed of epidermoid cells, sometimes containing calcitonin cells. Understanding SCN is crucial for accurate thyroid pathology and tumor analysis.

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Area of Science:

  • Histopathology
  • Endocrinology
  • Cell Biology

Background:

  • Solid cell nests (SCN) are commonly found ultimobranchial remnants in the thyroid.
  • These structures are characterized by non-keratinizing epidermoid cells and may contain calcitonin-immunoreactive cells.

Purpose of the Study:

  • To analyze the relationship between SCN and thyroid parenchymal cells.
  • To investigate the implications of the thyroid ultimobranchial system in tumor histogenesis.
  • To highlight potential diagnostic challenges in pathological evaluations of SCN.

Main Methods:

  • Immunohistochemistry for keratin proteins and carcinoembryonic antigen.
  • Histochemical staining (PAS with diastase) to identify specific materials.
  • Morphological analysis of SCN and associated structures, including mixed follicles.

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Main Results:

  • SCN are composed of epidermoid cells, often positive for keratin and CEA, and can contain calcitonin cells in over half of cases.
  • The lumen of SCN may contain mucin, cell debris, and PAS-positive material; mixed follicles are also observed.
  • The study emphasizes the distinct nature of SCN from typical thyroid follicular cells.

Conclusions:

  • SCN represent ultimobranchial remnants with unique cellular and structural features.
  • Understanding SCN is vital for differentiating them from neoplastic lesions and for comprehending thyroid tumor development.
  • Awareness of SCN characteristics aids in avoiding diagnostic errors in thyroid pathology.