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An ectopic thyroid is a condition in which some of a person's thyroid tissues or the entire gland fails to form in the right place...
What is overactive thyroid (hyperthyroidism)? An overactive thyroid (also called hyperthyroidism or thyrotoxicosis) is when the thyroid gland produces more thyroid hormones than normal. The thyroid gland may become enlarged, or contain nodules (lumps) of overactive tissue. This excess thyroid has the effect of speeding up metabolism throughout the body.