Terme de Glossaire

hyperthyroidism

An endocrine gland located at the front of the neck, the thyroid regulates various hormonal systems thanks to the secretion of two hormones, triiodothyronine (T3) and thyroxin (T4). Hyperthyroidism is caused by an excessive concentration of one or both of these hormones in the blood. The most frequent symptoms are tachycardia, diarrhea, weight-loss and insomnia. The opposite symptoms are associated with hypothyroidism including tiredness, memory loss and weight increase.

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