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The Thyroid Gland01:23

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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.
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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...
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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...
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Related Experiment Video

Updated: Apr 27, 2026

Transoral Robotic Total Thyroidectomy and Bilateral Central Regional Lymph Node Dissection for Papillary Thyroid Carcinoma
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Thymectomy in central lymph node dissection for papillary thyroid cancer.

Du-Ping Huang1, Xiao-He Ye2, You-Qun Xiang1

  • 1Department of Oncology, The First Affiliated Hospital of Wenzhou Medical College Wenzhou, 325000, China.

International Journal of Clinical and Experimental Medicine
|June 24, 2014
PubMed
Summary

Unilateral thymectomy during central lymph node dissection (CND) for papillary thyroid cancer (PTC) reduces hypocalcemia risk without compromising cancer resection. Bilateral thymectomy increases complication rates without oncologic benefit.

Keywords:
Thymectomylymph node dissectionpapillary thyroid cancer

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Area of Science:

  • Endocrinology
  • Surgical Oncology
  • Pathology

Background:

  • Central lymph node dissection (CND) is proposed for papillary thyroid cancer (PTC) with clinically negative lymph nodes to enable pathologic staging and treat micrometastases.
  • The study investigates the optimal extent of prophylactic CND by comparing unilateral and bilateral thymectomy during total thyroidectomy.

Purpose of the Study:

  • To determine the optimal extent of prophylactic central lymph node dissection in papillary thyroid cancer patients.
  • To compare postoperative complications between unilateral and bilateral thymectomy during total thyroidectomy with CND.

Main Methods:

  • Patients with sonographically node-negative papillary thyroid carcinomas underwent total thyroidectomy with CND.
  • Group 1: Total thyroidectomy + unilateral thymectomy during CND.
  • Group 2: Total thyroidectomy + bilateral thymectomy during CND.

Main Results:

  • The rate of transient hypocalcemia was significantly higher in Group 2 (bilateral thymectomy, 52.4%) compared to Group 1 (unilateral thymectomy, 13.7%).
  • Five cases of papillary thymic metastases were identified, all as ipsilateral micrometastases of PTC within the thymus upper pole.
  • No contralateral thymic metastases were found, indicating no additional oncologic benefit from bilateral thymectomy.

Conclusions:

  • Bilateral thymectomy during CND does not improve carcinologic resection in PTC patients with clinically negative nodes.
  • Unilateral thymectomy combined with total thyroidectomy and CND is an effective strategy to reduce postoperative hypocalcemia.
  • This approach may represent an optimal balance between oncologic safety and reduced morbidity in PTC management.