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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...

The Thyroid Gland

The Thyroid Gland

The thyroid gland is a small, butterfly-shaped gland located in the neck and covers the anterior surface of the trachea. The gland has two lateral lobes connected by a thin tissue mass called the isthmus. Internally, each lobe comprises many small spherical structures known as thyroid follicles, surrounded by a network of blood vessels.
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...

Goiter

Goiter

Goiter refers to an abnormal enlargement of the thyroid gland that may appear as a diffuse goiter (uniform enlargement) or nodular (single or multiple nodules). Functionally, it is classified as nontoxic (normal/low hormone levels) or toxic (excess hormone production).PathophysiologyDiffuse thyroid enlargement typically results from prolonged stimulation by thyroid-stimulating hormone (TSH) or TSH-like agents, commonly seen in hypothyroidism or iodine deficiency. In contrast, in hyperthyroid...

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...

Synthesis and Regulation of Thyroid Hormones

Synthesis and Regulation of Thyroid Hormones

Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The...

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Updated: Apr 21, 2026

Gasless Endoscopic Thyroidectomy via the Trans-Axillary Approach

Gasless Endoscopic Thyroidectomy via the Trans-Axillary Approach

Published on: September 15, 2023

Hemithyroidectomy for unilateral thyroid disease.

Z Ergul, M Akinci, H Kulacoglu

Chirurgia (Bucharest, Romania : 1990)

|November 7, 2014

Summary

This summary is machine-generated.

Hemithyroidectomy for unilateral thyroid disease shows a 12% recurrence rate and an 8% hypothyroidism rate. This procedure offers advantages over bilateral resections with few complications and short hospital stays.

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Last Updated: Apr 21, 2026

Gasless Endoscopic Thyroidectomy via the Trans-Axillary Approach

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Published on: September 15, 2023

Minimal Invasive Resection of Large Retrosternal Thyroid Goiter

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Transoral Robotic Total Thyroidectomy and Bilateral Central Regional Lymph Node Dissection for Papillary Thyroid Carcinoma

Transoral Robotic Total Thyroidectomy and Bilateral Central Regional Lymph Node Dissection for Papillary Thyroid Carcinoma

Published on: September 15, 2023

Area of Science:

Endocrinology
Surgical Oncology
Thyroid Disease Management

Background:

Unilateral nodular thyroid disease often necessitates surgical intervention.
Hemithyroidectomy is a common surgical approach for localized thyroid conditions.
Comparing hemithyroidectomy outcomes with more extensive thyroid resections is crucial for treatment optimization.

Purpose of the Study:

To determine the recurrence and hypothyroidism rates following hemithyroidectomy for unilateral nodular thyroid disease.
To evaluate the advantages of hemithyroidectomy compared to bilateral radical thyroid resections.

Main Methods:

Fifty patients with unilateral thyroid disease underwent hemithyroidectomy.
Postoperative follow-up included thyroid function tests and annual ultrasonography.
Recurrence (nodule ≥ 5 mm) and need for thyroxine therapy were analyzed.

Main Results:

The recurrence rate was 12% after a mean follow-up of 25.2 months.
Clinical hypothyroidism requiring thyroxine therapy occurred in 8% of patients.
Preoperative factors and nodule characteristics did not predict recurrence or thyroxine need.

Conclusions:

Hemithyroidectomy for unilateral thyroid disease presents a moderate recurrence risk.
Low rates of hypothyroidism and rare postoperative complications are associated with this procedure.
Hemithyroidectomy offers benefits including a short hospital stay.