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Oakland Gardens, NY
A 26-year-old male asked:

What could cause hyperthyroidism if it's not graves, hasmitos, pituitary problem? i have low tsh 0.01 but normal free t3 (liothyronine) and t4 and normal total t3t4

1 doctor answer • 2 doctors weighed in
Dr. Thomas Knecht
A Verified Doctoranswered
33 years experience
Already answered: Hi. I already told you: hyper-functioning ("hot") thyroid nodule is most likely, but a phase of subacute thyroiditis (ST) is certainly a possibility. Following thyroid function over time, or a 123-I thyroid scan (and uptakes) would tell the difference. This all assumes you're not surreptitiously TAKING thyroid hormone (which would look like ST, but unlike ST would have a suppressed thyroglobulin).
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Dr. Adeshola Ezeokoli
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Last updated Oct 18, 2014

Found in:

Hyperthyroidism›Thyroxine›Thyroid stimulating hormone

People also asked

What can cause low TSH of its not a Thyroid or pituitary problem? 0.01 TSH T3 (liothyronine) and T4 free normal, graves and hasmitos negative
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My tsh level is 0.01, T3 is 134 and Free t4 is 1.3. I will be retested in 3 months. What are the chances of it being Graves disease or hyperthyroidism? I have no history of thyroid issues & i am 11 months postpartum. Also no symptoms of anything?
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Diagnosed with hyperthyroidism. Unknown cause. Tsh in range. Normal t3 high ft4. Negative antibodies for graves and Hashi. Thyroid ultrasound normal. Low b12 lower range vit D. Normal prolactin level. Endo believes its pituitary?
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Tsh 0.01, T3 (liothyronine) free 4.3, t4. Free 1.8 ? Tsh low T3 (liothyronine) very slightly elevated T4 high normal, what is this? Is it hyperthyroidism? Pcp saying it's ok?
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Graves disease & take tapezole 5mg. Recent bloodwork: tsh, T4 free normal. T3 (liothyronine) total: 72 low, tsi: 265 high. What does this mean particulary high tsi?
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