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Related Experiment Videos

The intrathyroidal hyperfunctioning parathyroid gland.

J Sawady1, G Mendelsohn, R L Sirota

  • 1Department of Laboratories, Mount Sinai Medical Center, Cleveland, Ohio.

Modern Pathology : an Official Journal of the United States and Canadian Academy of Pathology, Inc
|November 1, 1989
PubMed
Summary
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Primary hyperparathyroidism can arise from rare intrathyroidal parathyroid glands. This study details six cases, including adenomas and a carcinoma, highlighting diagnostic challenges and the role of immunocytochemistry for parathormone (PTH).

Area of Science:

  • Endocrinology
  • Surgical Pathology
  • Oncology

Background:

  • Primary hyperparathyroidism is typically caused by parathyroid adenomas or hyperplasia, usually located ectopically in the neck.
  • Intrathyroidal parathyroid glands are an uncommon cause of hyperparathyroidism, posing diagnostic and surgical challenges.

Purpose of the Study:

  • To report and analyze cases of primary hyperparathyroidism resulting from hyperfunctioning intrathyroidal parathyroid glands.
  • To discuss the differential diagnosis and diagnostic modalities for intrathyroidal parathyroid lesions.

Main Methods:

  • Case series reporting six patients with hyperfunctioning intrathyroidal parathyroid glands.
  • Review of clinical presentations, surgical findings, and histopathological diagnoses.
  • Discussion of immunocytochemical staining for parathormone (PTH), thyroglobulin, and calcitonin.

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Main Results:

  • Five cases involved intrathyroidal parathyroid adenomas (four female, aged 40-70) and one involved intrathyroidal parathyroid carcinoma (male, 55).
  • Thyroidectomy was performed in adenoma cases when glands were not found in typical locations.
  • Carcinoma presented with hypercalcemia and a thyroid mass; differential diagnosis included thyroid follicular adenoma and medullary carcinoma.

Conclusions:

  • Intrathyroidal parathyroid glands are a rare but significant cause of primary hyperparathyroidism.
  • Accurate diagnosis requires differentiating these lesions from thyroid neoplasms, with immunocytochemistry being crucial.
  • Surgical management may involve thyroidectomy when parathyroid glands are intrathyroidal.