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Intrathyroidal parathyroid

H R Harach1, G M Vujanić

  • 1Department of Pathology, University of Wales College of Medicine, Cardiff, United Kingdom.

Pediatric Pathology
|January 1, 1993
PubMed
Summary
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Intrathyroidal parathyroid tissue was found in 13 of 58 human fetal thyroid glands. This finding is important for managing primary hyperparathyroidism, especially when caused by parathyroid hyperplasia.

Area of Science:

  • Endocrinology
  • Anatomy
  • Surgical Pathology

Background:

  • Parathyroid tissue is typically located external to the thyroid gland.
  • The presence and location of intrathyroidal parathyroid tissue in human fetuses are not well-documented.

Purpose of the Study:

  • To investigate the incidence and location of intrathyroidal parathyroid tissue in human fetal thyroid glands.
  • To assess the clinical significance of intrathyroidal parathyroid tissue in the context of endocrine disorders.

Main Methods:

  • Systematic dissection and histological examination of 58 human fetal thyroid glands obtained post-mortem.
  • Documentation of the presence and anatomical position (subcapsular or deep within thyroid parenchyma) of any identified parathyroid tissue.

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Main Results:

  • Intrathyroidal parathyroid tissue was identified in 13 thyroid lobes from 12 fetuses (22.4% incidence).
  • Tissue was located in a subcapsular position in 9 cases and deep within the thyroid in 4 cases.
  • The findings indicate that intrathyroidal parathyroid tissue is a relatively common finding in human fetuses.

Conclusions:

  • Intrathyroidal parathyroid tissue is not rare in human fetuses.
  • Awareness of this anatomical variation is crucial for the clinical and surgical management of patients with primary hyperparathyroidism, particularly those with parathyroid hyperplasia.