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Doctor insights on: Thyroid Function Test False Negative

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Dr. Tanya Russo
13 doctors shared insights

Thyroid (Definition)

The thyroid is an endocrine gland that sits in the lower part of the neck. It produces thyroid hormone - which ...Read more


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Can a thyroid function test determine height?

Can a thyroid function test determine height?

No : Thyroid function tests can only determine thyroid function. Final height potential can be estimated in older children by looking at bone age x-ray. However, it is not precise and many variables may affect predictability like timing of puberty. ...Read more

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What is specifically tested on a thyroid function test? I had a bad thyroid in my youth but now in the low range except I have the same symptoms.

What is specifically tested on a thyroid function test?  I had a bad thyroid in my youth but now in the low range except I have the same symptoms.

In a: Nut shell, it measures hormone release by your pituitary that if low, your thyroid is overactive, and high, your gland is underactive. It also measures the products is suppose to release. ...Read more

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I had a hemithyroidectomy 2 months ago, had thyroid function test which came back normal but I am showing symptoms of under active, what else could it?

I had a hemithyroidectomy 2 months ago, had thyroid function test which came back normal but I am showing symptoms of under active, what else could it?

Many things.: If your TSH is normal 2 months out from surgery the problem is not likely your thyroid. You should talk to your doc to investigate the meaning of your symptoms which were not unfortunately identified in your question. These would be very helpful clues as to the cause. Depression, stress, sleep disturbance, anemia, etc all could produce "under active" symptoms. ...Read more

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I have diffuse mild thyroid enlargment not painful do i need to make thyroid function test?We use iodinated salt,do i need treament how it will shrink

I have diffuse mild thyroid enlargment not painful do i need to make thyroid function test?We use iodinated salt,do i need treament how it will shrink

Yes, get lab tests: Hi. Most cases of goiter (abnormal size and/or shape of the thyroid) are painless. Goiter is not infrequently associated with either under activity (hypothyroidism) or overactivity (hyperthyroidism). If the enlargement is a nodule, thyroid cancer may be a possibility (but is statistically less likely than benign). Have TSH and free T4 tested. If it's a nodule, see an endocrinologist for evaluation ...Read more

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Cummulative thyroid function test TSH levels?

I'm sorry: But i don't understand your question. What are cummulative thyroid function tests? If there's a problem with your tsh, check w/your doctor. ...Read more

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What does it mean if the results of my thyroid function test are: TSH is 6.5 and the T4 is 19.5?

What does it mean if the results of my thyroid function test are: TSH is 6.5 and the T4 is 19.5?

Repeat the labs: It's unusual to have both a high TSH and high t4. On the next test, i would do a tsh, a free T4 and T3 (liothyronine) instead to rule out confounding factors. Thyroiditis should give you a low TSH instead of high. If the repeat test is just like above, high tsh, high free T4 (and you are not on a drug called amiodarone), you might need to get a MRI of the pituitary. Hopefully it's just a lab error. ...Read more

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