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Doctor insights on: Is The T4 And Tsh Thyroid Test The Same Thing

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Is the T4 and TSH thyroid test the same thing?

Is the T4 and TSH thyroid test the same thing?

No: Tsh is thyroid stimulating hormone, which comes from the pituitary gland. It's role is to basically stimulate the thyroid gland to make T4 and t3 (liothyronine). ...Read more

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Dr. Quang Nguyen
952 doctors shared insights

Thyroid Stimulating Hormone (Definition)

A TSH test measures the amount of thyroid stimulating hormone (TSH) in your blood. TSH is produced by the pituitary gland and tells the thyroid gland to make and release the hormones thyroxine ...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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Is the test for hashimoto's the same as the autoimmune disorders test?

Is the test for hashimoto's the same as the autoimmune disorders test?

Differences: Autoimmune disease is a general term to refer to multiple causes of inflammation often caused by a molecule in your body attacking some organ- such as your thyroid, pancreas, liver, or muscles. Hashimoto's disease is one form of an autoimmune disease leading to inflammation in the thyroid. In general, thyroid peroxidase antibody is a marker helpful in diagnose hashimoto's disease. ...Read more

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Is it true that hypothyroid and hyperthyroid are the same thing and are medicines the same ?

Is it true that hypothyroid and hyperthyroid are the same thing and are medicines the same ?

Opposite conditions: Hypothyroid is low thyroid levels, hyperthyroid is high thyroid levels. They are opposite conditions, so the medications to treat them are completely different. ...Read more

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Dr. Ira Katz Dr. Katz
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T3 (liothyronine) uptake and T4 thyroxine and free T4 index are normal, but TSH is4.65 and per the lab that is high. The highest normal is 4.5. What does this mean?

Dr. Ira Katz Dr. Katz
2 doctors agreed:
T3 (liothyronine) uptake and T4 thyroxine and free T4 index are normal, but TSH is4.65 and per the lab that is high. The highest normal is 4.5. What does this mean?

Once - Nothing!: Any symptoms? Sublinical hypothyroid or nothing. This is an odd combo of tests as T4 & FTI essential measure the same thing. Your TSH is just above normal & there is sometimes variability in the test. I would suggest, repeat testing by an endocrinologist about 2 weeks after this one, with antithyroid antibodies. If (+) closer monitoring, if (-) less close f/u. Fam Hx also important. Don't worry! ...Read more

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What is the effect of thyroid antibodies on the results of total and free T3 (liothyronine) T4 ?

What is the effect of thyroid antibodies on the results of total and free T3 (liothyronine) T4 ?

Anything: The presence of anti-thyroid antibodies suggests that you are more at risk to develop thyroid disease. The results of total and free t3 (liothyronine) and T4 depend on whether the thyroid is under active attack by the autoimmune process and the stage of the disease. Usually there is an initial phase of overactivity followed by under-activity (hypothyroid with low t3 (liothyronine) and t4) as the disease progresses. ...Read more

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I have a TSH of 0.10l and the lab slip says it is out of range. My T4 is 0.9 and my T3 (liothyronine) is 3.2. The T4 reagent produces results 9 percent higher. What does this all mean?

I have a TSH of 0.10l and the lab slip says it is out of range. My T4 is 0.9 and my T3 (liothyronine) is 3.2. The T4 reagent produces results 9 percent higher.  What does this all mean?

Normal Thyroid is?: Alot of variables. From your picture, i assume you are female. If you are on ocp's or hrt, this affects thyroid function. That is why most folks now look at free t3, (liothyronine) and t4. Age matters( usually look for a young female have tft's near upper range.What is normal is controversial. "lab normal"may not be normal for you. Look at- http://tinyurl.Com/7v6o72t. Also http://tinyurl.Com/ynwygo 2 views. ...Read more

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What is the reason of low body temperature. How i can treat it, what type of blood test to do, my tsh, t3, (liothyronine) T4 results are normal.

It depends: Upon how low your body temperature is. It's probably normal, but check w/your doctor. If thyroid levels are normal, it's not your thyroid. Make sure you are receiving brand name T4 replacement, as the generics are unreliable. ...Read more

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What is the treatment of high thyroid antibodies tpoab and tgab during pregnancy and the possibility of miscarriage? Reply me fast

What is the treatment of high thyroid antibodies tpoab and tgab during pregnancy and the possibility of miscarriage? Reply me fast

Hormones: The most important thing is to makes sure your TSH is normal and closet to about 0.5. You can't specifically do anything about the antibodies. There is a higher chance of miscarriage but usually that happens very early one. ...Read more

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What is the normal T4 and TSH levels in infants?

What is the normal T4 and TSH levels in infants?

Tsh > 40 mU/L: All infants with a low T4 concentration and a TSH concentration greater than 40 mU per L are considered to have congenital hypothyroidism and should have immediate confirmatory serum testing. Replacement levothyroxine (LT4) treatment should be initiated as soon as confirmatory samples have been taken, without waiting for the results ...Read more

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What is the accuracy of the standard 3 month HIV antibody test if taken at 2 months instead of 3? the one they tell you takes 3 months usually.

What is the accuracy of the standard 3 month HIV antibody test if taken at 2 months instead of 3? the one they tell you takes 3 months usually.

Probably conclusive: These days, "standard" usually means a "third generation" HIV antibody test, or sometimes a duo or "4th generation" test for both antibody and p24 antigen. The duo test is conclusive any time 4 weeks or more after the last possible exposure. The 3rd gen tests are officially conclusive at 3 months, but are virtualy 100% reliable by 6-8 weeks. Either way, you're in the clear! ...Read more

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Hi my TSH level is 5.79 with normal T4 levels and thyroid antibody. Is it safe to plan a pregnancy with the above reading?

Hi my TSH level is 5.79 with normal T4 levels and thyroid antibody. Is it safe to plan a pregnancy with the above reading?

Check this out first: You have slightly high TSH levels (0.4-5 mu/l nml range) and T4 is ok. If you have thyroid ab, you should get some workup for what it might be because it might point to your high tsh, and might indicate an underlying disease, like hashimoto's that you should be treated for before you think of pregnancy. Even if you don't have thyroid ab, you should get a thorough workup for unexpected findings. ...Read more

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Is a thyroid scan and raidioactive throid treatment the same?

Is a thyroid scan and raidioactive throid treatment the same?

No: A thyroid scan is a study that exposes you to a small amount of radiation and allows the radiologist to see images of the thyroid. A radioactive thyroid treatment is when you are given very large amounts of radiation in order to "kill" the overactive thyroid or thyroid cancer. ...Read more

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Tsh level is 3.2. Doctor called with negative test result for hypothyroidism. Why is no one following the new aace range of .3-3 that was made in 2003?

Tsh level is 3.2. Doctor called with negative test result for hypothyroidism. Why is no one following the new aace range of .3-3 that was made in 2003?

Depends: You should discuss this with your current doctor. Remember that thyroid pill is a hormone. Do not use it unless it is necessary. You don't just take a hormone just to see how you feel on it. If you are really worried about this, ask your doctor for a free T4 and thyroid antibodies test. If antibodies are positive, then you have autoimmune thyroid disease and can start treatment with goal TSH <2. ...Read more

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Thyroid (Definition)

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


Dr. David Sneid
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Thyroxine (Definition)

Thyroxine is a thyroid ...Read more