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Hypothyroidism - secondary

Overview Symptoms Treatment Prevention
Alternative Names:
Pituitary hypothyroidism
Symptoms:
Early symptoms: Late symptoms:
Signs and tests:
A physical exam usually reveals a small thyroid gland. Vital signs (temperature, pulse, rate of breathing, blood pressure) reveal a slow heart rate, low blood pressure, and low temperature.

A chest X-ray may reveal an enlarged heart.

Laboratory tests to determine thyroid function include:
  • Free T4 test
  • Total T3
  • Serum TSH -- Results are generally low in secondary hypothyroidism because the pituitary is damaged. However, normal or even high values may be seen.

Additional laboratory abnormalities may include:

Imaging will include an MRI of the pituitary to look for a tumor.

Primary and secondary hypothyroidism
Primary and secondary hypothyroidism
Thyroid gland
Thyroid gland
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