Thyroid nodules

Thyroid nodules Definition  : Thyroid nodules are solid or fluid-filled lumps that form within your thyroid, a small gland located at the base of your neck, just above your breastbone. The great majority of thyroid nodules aren't serious and don't cause symptoms. Thyroid cancer accounts for a small percentage of thyroid nodules. You often won't know you have a thyroid nodule until your doctor discovers it during a routine medical...

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Thyroid cancer

Thyroid cancer Definition  : Thyroid cancer occurs in the cells of the thyroid — a butterfly-shaped gland located at the base of your neck, just below your Adam's apple. Your thyroid produces hormones that regulate your heart rate, blood pressure, body temperature and weight. Although thyroid cancer isn't common in the United States, rates seem to be increasing. Doctors think this is because new technology is allowing them to find...

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Thunderclap headaches

Thunderclap headaches Definition: Thunderclap headaches live up to their name, grabbing your attention like a clap of thunder. The pain of these sudden, severe headaches peaks within 60 seconds and can start fading after an hour. Some of these headaches, however, can last for more than a week. Thunderclap headaches are uncommon, but they can be a warning sign of potentially life-threatening conditions — usually having to do with bleeding...

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Thumb arthritis

Thumb arthritis Definition: Thumb arthritis is the most common form of osteoarthritis affecting the hand. Also called basal joint arthritis, thumb arthritis occurs when the cushioning cartilage wears away from the adjoining ends of the bones that form your thumb joint (carpometacarpal joint). Thumb arthritis can cause severe hand pain, swelling, and decreased strength and range of motion, making it difficult to do simple household tasks,...

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Thrombophlebitis

Thrombophlebitis ...

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Thrombocytosis

Thrombocytosis Definition: Thrombocytosis (throm-boe-sie-TOE-sis) is a disorder in which your body produces too many platelets (thrombocytes), which play an important role in blood clotting. The disorder is called reactive thrombocytosis when it's caused by an underlying condition, such as an infection. Thrombocytosis may also be caused by a blood and bone marrow disease. When caused by a bone marrow disorder, thrombocytosis is called autonomous,...

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Thoracic outlet syndrome

Thoracic outlet syndrome Definition: Thoracic outlet syndrome is a group of disorders that occur when the blood vessels or nerves in the thoracic outlet — the space between your collarbone and your first rib — become compressed. This can cause pain in your shoulders and neck and numbness in your fingers. Common causes of thoracic outlet syndrome include physical trauma from a car accident, repetitive injuries from job- or sports-related...

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