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THYROID | Secondary Hypo or Hyper

Secondary hypothyroidism or hyperthyroidism occurs when a dysfunction of the hypothalamus or pituitary gland causes the thyroid to under or overproduce thyroid hormones - by under or over secreting TSH. Thyroid function tests will generally show low TSH, T4 & T3 or high TSH, T4 & T3 respectively.

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