Assertion: endocrine gland's hormone | /r/CreatedBy | adrenal gland calcitonin
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text: , a hormone over-produced by the adrenal gland Calcitonin, the hormone produced by the cells of the thyroid, which eventually become malignant in the form of medullary thyroid cancer; everybody with medullary thyroid cancer will have elevated levels of calcitonin in their blood.