A fluid-filled sac that is present at birth and located in the midline of the neck. A thyroglossal cyst is a congenital malformation (a birth defect). It results from incomplete closure of a segment of the thyroglossal duct, a tube-like structure that normally closes as the embryo develops. Also called a thyroglossal duct cyst or a thyrolingual cyst.
- Thyroid binding globulin
A blood protein that binds with the thyroid hormone thyroxine (T4).
- Thyroid cancer
Cancer of the gland in front of the neck that normally produces thyroid hormone which is important to the normal regulation of the metabolism of the body. There are 4 major types of thyroid cancer — papillary, follicular, medullary, and anaplastic. The most common symptom of thyroid cancer is a lump, or nodule, that can […]
- Thyroid cartilage
The largest of the cartilages of the larynx (the voice box). The thyroid cartilage is formed of two approximately quadrilateral plates (called laminae) that are joined anteriorly (in the front) at an angle of from 90° to 120° to create a prominence in the neck. This bump is called the laryngeal prominence (or, familiarly, Adam’s […]
- Thyroid gland
two wings (lobes) attached to one another by a middle part called the isthmus. The thyroid uses iodine, a mineral found in some foods and in iodized salt, to make its hormones. The two most important thyroid hormones are thyroxine (T4) and triiodothyronine (T3). Thyroid stimulating hormone (TSH), which is produced by the pituitary gland, […]
- Thyroid hormone
A chemical substance made by the thyroid gland for export into the bloodstream. The thyroid gland needs iodine to make thyroid hormones. The two most important thyroid hormones are thyroxine (T4) and triiodothyronine (T3). The thyroid gland is located in front of the neck just in front of the trachea.