A member asked:

I just got back my results and have an incredible high t3, (liothyronine) what does this mean?

4 doctors weighed in across 2 answers
Dr. Cayce Jehaimi answered

Specializes in Pediatric Endocrinology

Hyperthyroidism ?: High T3 (liothyronine) means hyperthyroidism or thyrotoxicosis depending on severity. You should seek an endocrinologist to decipher etiology of such elevation and if you need thyroid scan to come with an accurate diagnosis. If you are a female and in pubertal/post pubertal range, the odds are in favor of graves' disease being the mostly likely cause. Females: pregnancy test recommended.

Answered 1/7/2019

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Dr. Donald Colantino answered

Specializes in Internal Medicine

T3: An elevated t3 is seen in overactive thyroid but other thyroid results are needed for confirmation. These include an elevated t4 and a very low TSH level as well before the diagnosis of hyperthyroidism is accepted.

Answered 1/7/2019

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