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Doctor insights on: Thyroid Problem Test Online

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Why don't dr test free T3 (liothyronine) and free T4 when testing thyroid? This is how you accurately diagnose thyroid prob? Right

Why don't dr test free T3 (liothyronine) and free T4 when testing thyroid? This is how you accurately diagnose thyroid prob? Right

TSH is key: If it is just a simple screening of your thyroid function, doing a TSH is the most sensitive test for picking up problems. If the TSH is abnormal, then the free T3 (liothyronine) and T4 are performed to further clarify what type of problem exists with the thyroid. If the TSH is normal, then a T3 (liothyronine) and T4 are not usually performed. ...Read more

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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What specific tests check for thyroid problems?

What specific tests check for thyroid problems?

Various: Lab tests tell thyroid function; exam, ultrasound tell structure. Uptake tells how much iodine gets into the thyroid, and scan can show which areas are taking up iodine. Other tests may show inflammation, tumor markers, etc. ...Read more

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Might a thyroid blood test show hormonal problems?

Might a thyroid blood test show hormonal problems?

Possibly: Thyroid produces a hormone so depending on what you are looking for thyroid blood test can show if there is a thyroid hormone problem but other hormones require other tests. ...Read more

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Can a t3/t4 thyroid test be a false negative? If so, what additional thyroid tests can be done to correctly diagnose?

Can a t3/t4 thyroid test be a false negative? If so, what additional thyroid tests can be done to correctly diagnose?

TSH: The most sensitive test for determining your thyroid level is a TSH level. If TSH and free T4 levels are normal, you likely do not have a thyroid function problem. Don't let anyone start treating you with thyroid hormone based on symptoms alone. ...Read more

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Could a thyroid blood test miss a hypothyroid issue?

Could a thyroid blood test miss a hypothyroid issue?

Yes: There are several parts to a thyroid blood test. Often only 1 part is used, called a TSH (thyroid stimulating hormone.) if it is high normal and a person has symptoms of low thyroid, like depression, weight gain, intolerance to cold, the practitioner often gets a different test, a free circulating thyroid hormone. When it's all borderline it is often worth a trial of low dose thyroid replacement. ...Read more

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What test is used to diagnose thyroid problems?

What test is used to diagnose thyroid problems?

Tests: Thyroid tests include two kinds -- function and physical appearance. One does not exclude the other. Lab testing can tell the function and antibody lab tests can tell inflammation. There are also lab tests for certain tumors. Radiology tests can tell the appearance ie nodules, inflammation, cysts, enlargement. ...Read more

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Could an eating disorder cause low T3 (liothyronine) thyroid on blood tests? How?

Could an eating disorder cause low T3 (liothyronine) thyroid on blood tests? How?

Yes: Malnutrition, as can occur with an eating disorder, can cause a disturbance in the way the body assembles important chemicals like thyroid hormone. Eating disorders can be deadly, with up to a 25% mortality rate in untreated cases. ...Read more

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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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Doc is testing tsh, t3 (liothyronine), (liothyronine) t4, free t3 (liothyronine), (liothyronine) free t4, and reverse t3 (liothyronine). Are there other tests that should be done at the same time as these tests for thyroid?

Too many tests: The only ones you really need are free T4 and tsh. The others are a waste of blood any money, and may lead to incorrect conclusions about your thyroid status. ...Read more

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What occurs if somebody without a thyroid problem took thyroid medication?

What occurs if somebody without a thyroid problem took thyroid medication?

What thyroid med?: Depends on the thyroid med. If your thyroid is normal, and you took a moderate dose of levothyroxine, your thyroid would shut down and you would not get hyper since the hormone replacement takes over. A normal thyroid would then recover if you stopped the drug. If you took methimazole, it would probably make you hypothyroid. However, a normal thyroid would prob recover after drug withdrawal. ...Read more

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Can gastroscopy and negative blod test miss out on gluten intoleranse.With persistent problem and nutrient deficiency is there indication for new test?

Can gastroscopy and negative blod test miss out on gluten intoleranse.With persistent problem and nutrient deficiency is there indication for new test?

Yes and no.: The "gold standard" for diagnosing celiac disease (gluten allergy) is a biopsy of the small intestine. There are a few blood tests that are typically ordered and are usually positive in people with celiac disease, but they are not 100%. The stomach is usually not affected by gluten allergy. Rather than undergo more testing, go gluten free for 4-6 weeks and see if your symptoms improve. ...Read more

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Im 23yr female. Ive hypothyroid symptoms, but my T3, (liothyronine)T4,TSH test results came out normal. What thyroid tests should i take to test thyroid antibodies?

Thyroid Ab's and...: Many people who are clinically hypothyroid have normal tests as what is normal is debatable. Many believe any TSH above 3 is too high, some even above 2. Check anti-thyroglobulin and TPO antibodies but also test Free T3 (liothyronine) and Reverse T3 (liothyronine). See http://tinyurl.com/koyamo5 and http://tinyurl.com/nrww2qg and http://www.stopthethyroidmadness.com/tsh-why-its-useless/ ...Read more

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Dr.Says thyroid panel shows hyperthyroid but i'm 200 lbs & gaining.What could be wrong?He prescribed me antidepressants until next labs.

hyperthyroidism: Hyperthyroidism increases your metabolism but also your appetite. You can certainly be obese and hyperthyroid. If you are indeed hyperthyroid, you need to be treated. You may need to see an endocrinologist. ...Read more

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What is a thyroid peroxidase antibody test? Does it diagnose thyroid disease?

What is a thyroid peroxidase antibody test? Does it diagnose thyroid disease?

Thyroid peroxidase (TPO), an enzyme normally found in the thyroid gland, plays an important role in the production of thyroid hormones: A TPO test detects antibodies against TPO in the blood. If you've been diagnosed with thyroid disease, your doctor may recommend a TPO antibody test — in addition to other thyroid tests — to help determine the cause. The presence of TPO antibodies in your blood suggests that the cause of thyroid disease is an autoimmune disorder, such as Hashimoto's disease or Graves' disease. In autoimmune disorders, your immune system makes antibodies that mistakenly attack normal tissue. Antibodies that attack the thyroid gland cause inflammation and impaired function of the thyroid. Your doctor may also order a TPO antibody test if you are pregnant and have an autoimmune disease, especially one that involves the thyroid, such as Hashimoto's disease or Graves' disease. Some people with TPO antibodies may not have thyroid disease. However, the presence of TPO antibodies may increase the risk of future thyroid disorders. If you have normal thyroid function with TPO antibodies, your doctor may recommend periodic checkups to watch for future thyroid problems. ...Read more

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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

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

2 possibilities: Hi. First of all, Hashimoto's doesn't cause a suppressed TSH, and YES, your TSH is SUPPRESSED, not "low", because your free T4 and total T3 (liothyronine) are "normal". A low TSH (pituitary defect) would cause low free T4 and possibly/probably low T3 (liothyronine). The most likely is a "hot" thyroid nodule (autonomously hyper-functioning); second most likely would be a phase of subacute thyroiditis. Follow over time to tell. ...Read more