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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...
Low thyroid (also referred to as sluggish thyroid, thyroid deficiency, and subclinical hypothyroidism) means that your thyroid gland is putting out less thyroid hormones than your body needs. This is a natural occurrence with aging. The thyroid gland produces a hormone called thyroxine, also known as T4.