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Related Concept Videos

The Thyroid Gland01:23

The Thyroid Gland

6.5K
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...
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The Parathyroid Glands00:59

The Parathyroid Glands

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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...
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Synthesis and Regulation of Thyroid Hormones01:20

Synthesis and Regulation of Thyroid Hormones

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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...
7.0K

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Related Experiment Video

Updated: Jan 6, 2026

Transoral Endoscopic Thyroidectomy Vestibular Approach for Thyroid Lobectomy
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Transoral Endoscopic Thyroidectomy Vestibular Approach for Thyroid Lobectomy

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[Ectopic thyroid tissue after total thyroidectomy].

D Seitz1, I Todt2, E Boga2

  • 1Klinikum Bielefeld Mitte, Klinik für Hals‑, Nasen- und Ohrenheilkunde, Kopf- und Halschirurgie, Teutoburger Str. 50, 33604, Bielefeld, Deutschland. daniela.seitz@klinikumbielefeld.de.

HNO
|October 4, 2019
PubMed
Summary
This summary is machine-generated.

Ectopic thyroid tissue, found outside the normal location, can enlarge after thyroid removal. This enlarged tissue may present as an unexplained neck mass, requiring consideration in diagnosis.

Keywords:
ChoristomaHyperplasiaHypothyroidismThyroid dysgenesisThyroid neoplasm

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Area of Science:

  • Endocrinology
  • Surgical Pathology
  • Head and Neck Surgery

Background:

  • Ectopic thyroid tissue can exist independently or alongside normal thyroid tissue.
  • Following total thyroidectomy, thyroid-stimulating hormone can cause asymptomatic ectopic tissue to enlarge.

Purpose of the Study:

  • To highlight the potential for ectopic thyroid tissue to present as an undiagnosed cervical mass after thyroidectomy.
  • To emphasize the importance of considering ectopic thyroid tissue in the differential diagnosis of cervical masses.

Main Methods:

  • Literature review and case analysis (implied).
  • Differential diagnostic considerations for cervical masses.

Main Results:

  • Enlargement of previously asymptomatic ectopic thyroid tissue can create a cervical space-occupying lesion.
  • This hyperplastic ectopic tissue may be mistaken for other cervical masses.

Conclusions:

  • Ectopic thyroid tissue should be considered in the differential diagnosis of unclear cervical masses, especially post-thyroidectomy.
  • Recognition of this possibility can prevent unnecessary surgical interventions or aid in diagnosis.