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The Parathyroid Glands

The Parathyroid Glands

The two pairs of parathyroid glands embedded within the posterior surface of the thyroid gland are restricted by a dense capsule around them. These glands comprise two distinct cell populations—parathyroid oxyphil and parathyroid principal cells- pivotal in calcium homeostasis.
Oxyphil cells, whose functions remain elusive, emerge during late puberty, adding a layer of complexity to the parathyroid gland's intricacies. In contrast, principal parathyroid cells undertake a vital role by producing...

Hyperthyroidism II: Pathophysiology

Hyperthyroidism II: Pathophysiology

Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...

Hyperthyroidism I: Introduction

Hyperthyroidism I: Introduction

Hyperthyroidism is a type of thyrotoxicosis characterized by the thyroid gland's overproduction of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). This hormone excess increases the basal metabolic rate and enhances sensitivity to catecholamines.DiagnosisDiagnosis is based on clinical features and biochemical testing. It typically shows suppressed thyroid-stimulating hormone (TSH) levels below 0.4 mIU/L, with elevated free T3 and/or T4. Additional tests, including thyroid...

Graves Disease II: Pathophysiology

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Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...

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Hyperfunctional parathyroid carcinoma with mediastinal extension.

Emanuele Ferri¹, Enrico Armato, Francisco José García Purriños

¹Servicio de Otorrinolaringología, Hospitales de Dolo y Mirano, Venecia, Italia. emaferri@libero.it

Acta Otorrinolaringologica Espanola

|February 8, 2011

Summary

Parathyroid carcinoma (PC) is a rare cancer, difficult to diagnose before surgery. This case highlights diagnostic challenges and treatment for a hyperfunctional PC with mediastinal spread.

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Area of Science:

Endocrinology
Oncology
Surgical Pathology

Background:

Parathyroid carcinoma (PC) is an exceptionally rare malignancy, accounting for 0.005% of all tumors.
Diagnosis is challenging, often confirmed only by post-surgical histopathology.
Prognosis depends on local disease extent and complete surgical resection.

Observation:

Presents an uncommon case of hyperfunctional PC with mediastinal extension.
Highlights diagnostic difficulties encountered in preoperative assessment.
Details histopathological features and treatment strategies employed.

Findings:

The case underscores the rarity and diagnostic complexity of parathyroid carcinoma.
Mediastinal extension presents unique surgical and management challenges.
Analysis includes the most recent literature data on PC.

Implications:

Improved preoperative diagnostic strategies for parathyroid carcinoma are needed.
Early and complete surgical resection is crucial for favorable outcomes.
Further research into the management of advanced parathyroid carcinoma is warranted.