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Location: in the neck below the Adam’s apple, surrounding the larynx and upper trachea (cricoid and tracheal cartilages).
The thyroid gland is located in the front of the neck, below the Adam’s apple, surrounding the upper trachea and larynx (cricoid and tracheal cartilages). It lies against and around the front of the larynx and trachea, with the trachea, larynx, lower pharynx, and esophagus positioned behind it. The gland is typically butterfly-shaped, consisting of two lobes (left and right) connected by a narrow band of tissue called the isthmus. Grossly, the thyroid is usually described as butterfly-shaped or H-shaped due to the two lobes and connecting isthmus. It weighs about 25 g in adults, with each lobe roughly 5 cm long, 3 cm wide, and 2 cm thick, and an isthmus about 1.25 cm in height and width. The thyroid commonly moves up and down with swallowing because of its attachments to the thyroid and cricoid cartilages. Variations in gross shape are common, including the presence of a pyramidal lobe (a remnant related to the thyroglossal duct) and other accessory or positional variants such as Zuckerkandl’s tubercle.
Location: in the neck below the Adam’s apple, surrounding the larynx and upper trachea (cricoid and tracheal cartilages).
Gross shape: two lobes connected by a narrow isthmus, typically described as butterfly-shaped (or H-shaped).
Size: adult thyroid averages about 25 g; each lobe is ~5 cm by 3 cm by 2 cm, with an isthmus ~1.25 cm in height and width.
Movement: the gland moves with swallowing due to attachments to the thyroid and cricoid cartilages.
Common variations: pyramidal lobe and other accessory/positional variants can alter the gross shape.
An endocrine gland in the neck below the Adam’s apple, typically butterfly-shaped with two lobes connected by an isthmus.
The narrow band of tissue connecting the left and right lobes of the thyroid gland.
A possible third lobe of the thyroid that can extend upward from the isthmus, often associated with a remnant of the thyroglossal duct.
A posterior horn-like projection near the back of the thyroid lobes, typically close to the recurrent laryngeal nerve and inferior thyroid artery.
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