A member asked:

With a tsh >150 should i have more testing done like t3, (liothyronine) t4, ultrasound?

4 doctors weighed in across 2 answers

Yes.: A very high TSH suggests long-term underactive thyroid. T4, T3 (liothyronine) and thyroid antibody tests are appropriate. Ultrasound might not be necessary.

Answered 4/16/2016

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Ultrasound: You don't really need any other lab, but would benefit from an ultrasound, particularly if your doctor thinks your thyroid feels abnormal. You need to receive brand name T4 at a dose that returns your TSH to normal.

Answered 1/15/2015

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