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The thyroid, or thyroid gland, is an endocrine gland in vertebrates. In humans, it is a butterfly-shaped gland located in the neck below the Adam's apple. It consists of two connected lobes. The lower two thirds of the lobes are connected by a thin band of tissue called the isthmus (pl.: isthmi).
The Adam's apple is the protrusion in the neck formed by the angle of the thyroid cartilage surrounding the larynx, typically visible in men, less frequently in women. The prominence of the Adam's apple increases in some men as a secondary male sex characteristic during puberty. [1]
A goitre can present as a palpable or visible enlargement of the thyroid gland at the base of the neck. A goitre, if associated with hypothyroidism or hyperthyroidism, may be present with symptoms of the underlying disorder.
A goiter is a diffuse, often symmetric, swelling of the thyroid gland visible in the anterior neck that may develop. [13] The thyroid gland may become firm, large, and lobulated in Hashimoto's thyroiditis, but changes in the thyroid can also be non-palpable. [14] Enlargement of the thyroid is due to lymphocytic infiltration, and fibrosis. [15]
The thyroid is found in the neck, and is responsible for producing hormones that in turn play a role in metabolism, growth and development in children, temperature regulation and in the ...
These glands are not visible or able to be felt during examination of the neck. [3] Each parathyroid vein drains into the superior, middle and inferior thyroid veins. The superior and middle thyroid veins drain into the internal jugular vein, and the inferior thyroid vein drains into the brachiocephalic vein. [4]