Materiały źródłowe

• #1 Hypothyroidism (underactive thyroid) – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/hypothyroidism/symptoms-causes/syc-20350284

  Blood tests are used to diagnose hypothyroidism. […] If you’re taking thyroid hormone medicine for hypothyroidism, follow your health care provider’s advice on how often you need medical appointments. […] Hypothyroidism happens when the thyroid gland doesn’t make enough hormones. […] Hypothyroidism that isn’t treated can lead to other health problems, including: […] Infants with hypothyroidism present at birth that goes untreated are at risk of serious physical and mental development problems. […] Hypothyroidism during pregnancy and isn’t treated, it raises the risk of pregnancy loss, premature delivery and preeclampsia. […] Hypothyroidism can lead to a higher risk of heart disease and heart failure. […] Hypothyroidism that goes without treatment for a long time can damage the peripheral nerves. […] Hypothyroidism may cause the thyroid gland to become larger. […] A myxedema coma may be triggered by sedatives, infection or other stress on the body.

• #2 Hypothyroidism (Underactive Thyroid) – NIDDK

  https://www.niddk.nih.gov/health-information/endocrine-diseases/hypothyroidism

  How do doctors diagnose hypothyroidism? […] Your doctor will take your medical history and perform a physical exam. A hypothyroidism diagnosis cant be based on symptoms alone because many of its symptoms are the same as those of other diseases. […] That’s why your doctor may use several thyroid blood tests and imaging tests to confirm the diagnosis and find its cause. […] Because hypothyroidism can cause fertility problems, women who have trouble getting pregnant often get tested for thyroid problems.

• #3

  https://www.nhs.uk/conditions/underactive-thyroid-hypothyroidism/diagnosis/

  It’s very important that an underactive thyroid (hypothyroidism) is diagnosed as soon as possible. […] Therefore, you should see a GP and ask for a blood test if you repeatedly have symptoms of an underactive thyroid. […] A blood test measuring your hormone levels is the only accurate way to find out whether there’s a problem. […] The test, called a thyroid function test, looks at levels of thyroid-stimulating hormone (TSH) and thyroxine (T4) in the blood. […] A high level of TSH and a low level of T4 in the blood could mean you have an underactive thyroid. […] If your test results show raised TSH but normal T4, you may be at risk of developing an underactive thyroid in the future. […] The GP may recommend that you have a repeat blood test every so often to see whether you eventually develop an underactive thyroid.

• #4 Hypothyroidism | American Thyroid Association

  https://www.thyroid.org/hypothyroidism/

  Hypothyroidism is an underactive thyroid gland. Hypothyroidism means that the thyroid gland cant make enough thyroid hormone to keep the body running normally. […] Because the symptoms are so variable and nonspecific, the only way to know for sure whether you have hypothyroidism is with a simple blood test for TSH. […] The correct diagnosis of hypothyroidism depends on the following: Symptoms. Hypothyroidism doesnt have any characteristic symptoms. There are no symptoms that people with hypothyroidism always have and many symptoms of hypothyroidism can occur in people with other diseases. […] Blood tests. There are two blood tests that are used in the diagnosis of hypothyroidism. TSH (thyroid-stimulating hormone) test. This is the most important and sensitive test for hypothyroidism. It measures how much of the thyroid hormone thyroxine (T4) the thyroid gland is being asked to make. An abnormally high TSH means hypothyroidism: the thyroid gland is being asked to make more T4 because there isnt enough T4 in the blood.

• #5 Thyroid Function Tests | American Thyroid Association

  https://www.thyroid.org/thyroid-function-tests/

  Blood tests to measure these hormones are readily available and widely used, but not all are useful in all situations. […] The best way to initially test thyroid function is to measure the TSH level in a blood sample. Changes in TSH can serve as an early warning system often occurring before the actual level of thyroid hormones in the body becomes too high or too low. A high TSH level indicates that the thyroid gland is not making enough thyroid hormone (primary hypothyroidism). […] The finding of an elevated TSH and low FT4 or FTI indicates primary hypothyroidism due to disease in the thyroid gland. […] T3 testing rarely is helpful in the hypothyroid patient, since it is the last test to become abnormal. Patients can be severely hypothyroid with a high TSH and low FT4 or FTI, but have a normal T3.

• #6 Hypothyroidism – Endocrine and Metabolic Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/endocrine-and-metabolic-disorders/thyroid-disorders/hypothyroidism

  Hypothyroidism is thyroid hormone deficiency. […] Diagnosis is with thyroid function tests. […] Serum thyroid-stimulating hormone measurement is the most sensitive test for diagnosing hypothyroidism. In primary hypothyroidism, there is decreased feedback inhibition of the intact pituitary, and serum TSH is always elevated, whereas serum free T4 is low. In secondary hypothyroidism, free T4 and serum TSH are low (sometimes TSH is normal but with decreased bioactivity). […] Diagnose primary or secondary hypothyroidism by testing serum TSH and T4. In primary hypothyroidism, TSH is elevated and T4 is low; in secondary hypothyroidism, both TSH and T4 are low. […] Screening for hypothyroidism is warranted in select populations (eg, neonates, older adults with risk factors) in which it is relatively more prevalent, especially because it can cause significant morbidity and its manifestations can be subtle. Screening is done by measuring TSH levels.

• #7 Hypothyroidism | American Thyroid Association

  https://www.thyroid.org/hypothyroidism/

  Hypothyroidism is an underactive thyroid gland. Hypothyroidism means that the thyroid gland cant make enough thyroid hormone to keep the body running normally. […] Because the symptoms are so variable and nonspecific, the only way to know for sure whether you have hypothyroidism is with a simple blood test for TSH. […] The correct diagnosis of hypothyroidism depends on the following: Symptoms. Hypothyroidism doesnt have any characteristic symptoms. There are no symptoms that people with hypothyroidism always have and many symptoms of hypothyroidism can occur in people with other diseases. […] Blood tests. There are two blood tests that are used in the diagnosis of hypothyroidism. TSH (thyroid-stimulating hormone) test. This is the most important and sensitive test for hypothyroidism. It measures how much of the thyroid hormone thyroxine (T4) the thyroid gland is being asked to make. An abnormally high TSH means hypothyroidism: the thyroid gland is being asked to make more T4 because there isnt enough T4 in the blood.

• #8 Hypothyroidism | American Thyroid Association

  https://www.thyroid.org/hypothyroidism/

  T4 tests. Most of the T4 in the blood is attached to a protein called thyroxine-binding globulin. The bound T4 cant get into body cells. Only about 1%2% of T4 in the blood is unattached (free) and can get into cells. The free T4 and the free T4 index are both simple blood tests that measure how much unattached T4 is in the blood and available to get into cells.

• #9 Thyroid Function Tests | American Thyroid Association

  https://www.thyroid.org/thyroid-function-tests/

  Blood tests to measure these hormones are readily available and widely used, but not all are useful in all situations. […] The best way to initially test thyroid function is to measure the TSH level in a blood sample. Changes in TSH can serve as an early warning system often occurring before the actual level of thyroid hormones in the body becomes too high or too low. A high TSH level indicates that the thyroid gland is not making enough thyroid hormone (primary hypothyroidism). […] The finding of an elevated TSH and low FT4 or FTI indicates primary hypothyroidism due to disease in the thyroid gland. […] T3 testing rarely is helpful in the hypothyroid patient, since it is the last test to become abnormal. Patients can be severely hypothyroid with a high TSH and low FT4 or FTI, but have a normal T3.

• #10 Hypothyroidism: Diagnosis and Treatment | AAFP

  https://www.aafp.org/pubs/afp/issues/2021/0515/p605.html

  Clinical hypothyroidism affects one in 300 people in the United States, with a higher prevalence among female and older patients. […] The signs and symptoms that suggest thyroid dysfunction are nonspecific and nondiagnostic, especially early in disease presentation; therefore, a diagnosis is based on blood levels of thyroid-stimulating hormone and free thyroxine. […] Diagnosis is based on blood levels of decreased FT4, with a corresponding elevated thyrotropin (i.e., TSH) level in primary causes (thyroid source); the TSH level may be normal to low in secondary (pituitary source) or tertiary (hypothalamic source) causes. […] TSH elevation indicates hypothyroidism. Low-end normal TSH is 0.4 mIU per L. The upper-end normal range is from 4.0 to 4.5 mIU per L. FT4 level is used to distinguish clinical (low FT4) from subclinical (normal FT4) hypothyroidism.

• #11 Hypothyroidism: causes, diagnosis and treatment – The Pharmaceutical Journal

  https://pharmaceutical-journal.com/article/ld/hypothyroidism-causes-diagnosis-and-treatment

  Initial testing of TSH level alone, if within reference range of 0.4–4mU/L, is sufficient evidence to rule out primary hypothyroidism. […] If TSH is raised, a free T4 level, ideally tested from the same sample, is performed to confirm primary aetiology. […] A high TSH and low FT4 would indicate appropriate hypothalamic-pituitary response to low hormone levels and the thyroid gland’s inability to respond to this adequate stimulation. […] However, if TSH is low, both a free T3 (FT3) and FT4 level should be ordered, ideally from the same sample, to investigate for secondary hypothyroidism and also rule out potential hyperthyroidism. […] Reference ranges for FT4 and FT3 are 9–25 pmol/L and 3.5–7.8pmol/L, respectively. […] For patients who develop new symptoms or whose symptoms worsen, these tests should be re-checked no sooner than six weeks following initial testing, as re-testing any sooner is unlikely to show clinically significant changes. […] Therefore, in clinical practice, many centres will test TSH and FT4 at presentation of symptoms as standard assessment.

• #12 Hypothyroidism Secondary – Endocrine Surgery | UCLA Health

  https://www.uclahealth.org/medical-services/surgery/endocrine-surgery/patient-resources/patient-education/endocrine-surgery-encyclopedia/hypothyroidism-secondary

  Secondary hypothyroidism involves decreased activity of the thyroid caused by failure of the pituitary gland. […] The cause of secondary hypothyroidism is failure of the pituitary gland to secrete thyroid stimulating hormone (TSH). […] Risk factors for secondary hypothyroidism include being over 50 years old, being female, and having a history of pituitary or hypothalamic dysfunction. […] Laboratory tests to determine thyroid function include: Free T4 test, Total T3, Serum TSH — Results are generally low in secondary hypothyroidism because the pituitary is damaged. […] The purpose of treatment is to replace the deficient thyroid hormone. Levothyroxine is the most commonly used medication. […] In patients who have hypothyroidism caused by a pituitary tumor, surgery may be required. However, surgery may not cure the hypothyroidism, and thyroid replacement will still be needed. […] With early treatment, return to the normal state is usual. However, relapses will occur if the medication is not continued.

• #13 Hypothyroidism: Diagnosis and Treatment | AAFP

  https://www.aafp.org/pubs/afp/issues/2021/0515/p605.html

  Clinical hypothyroidism affects one in 300 people in the United States, with a higher prevalence among female and older patients. […] The signs and symptoms that suggest thyroid dysfunction are nonspecific and nondiagnostic, especially early in disease presentation; therefore, a diagnosis is based on blood levels of thyroid-stimulating hormone and free thyroxine. […] Diagnosis is based on blood levels of decreased FT4, with a corresponding elevated thyrotropin (i.e., TSH) level in primary causes (thyroid source); the TSH level may be normal to low in secondary (pituitary source) or tertiary (hypothalamic source) causes. […] TSH elevation indicates hypothyroidism. Low-end normal TSH is 0.4 mIU per L. The upper-end normal range is from 4.0 to 4.5 mIU per L. FT4 level is used to distinguish clinical (low FT4) from subclinical (normal FT4) hypothyroidism.

• #14 Hypothyroidism: causes, diagnosis and treatment – The Pharmaceutical Journal

  https://pharmaceutical-journal.com/article/ld/hypothyroidism-causes-diagnosis-and-treatment

  Initial testing of TSH level alone, if within reference range of 0.4–4mU/L, is sufficient evidence to rule out primary hypothyroidism. […] If TSH is raised, a free T4 level, ideally tested from the same sample, is performed to confirm primary aetiology. […] A high TSH and low FT4 would indicate appropriate hypothalamic-pituitary response to low hormone levels and the thyroid gland’s inability to respond to this adequate stimulation. […] However, if TSH is low, both a free T3 (FT3) and FT4 level should be ordered, ideally from the same sample, to investigate for secondary hypothyroidism and also rule out potential hyperthyroidism. […] Reference ranges for FT4 and FT3 are 9–25 pmol/L and 3.5–7.8pmol/L, respectively. […] For patients who develop new symptoms or whose symptoms worsen, these tests should be re-checked no sooner than six weeks following initial testing, as re-testing any sooner is unlikely to show clinically significant changes. […] Therefore, in clinical practice, many centres will test TSH and FT4 at presentation of symptoms as standard assessment.

• #15 Hypothyroidism Information | Mount Sinai – New York

  https://www.mountsinai.org/health-library/report/hypothyroidism

  Hypothyroidism, also called underactive thyroid, is a condition in which the thyroid gland does not produce enough hormones. […] Hypothyroidism can cause serious complications if left untreated. Fortunately, it can be easily diagnosed with blood tests that measure levels of the pituitary thyroid-stimulating hormone (TSH) and the thyroid hormone thyroxine (T4). […] Hypothyroidism is classified as either overt or subclinical disease. That diagnosis is determined on the basis of the TSH laboratory blood tests: […] TSH levels over 10mU/L indicate overt hypothyroidism. People will usually need thyroxine (T4) replacement therapy. […] TSH levels between 4.5 and 10 mU/L indicate mildly underactive (subclinical) hypothyroidism. People should be retested every 6 to 12 months. The decision to treat is made on an individual basis.

• #16 Hypothyroidism Investigation and management

  https://www.racgp.org.au/afp/2012/august/hypothyroidism

  Thyroxine replacement may be beneficial in some cases of elevated TSH associated with normal thyroid hormone levels, however, this remains controversial. […] Levothyroxine therapy is usually recommended where the serum TSH is greater than 10 mIU/L. […] Where the TSH is consistently between 5-10 mIU/L and the patient is symptomatic, a 3-6 month trial of levothyroxine replacement is appropriate. […] An algorithm for the management of subclinical hypothyroidism in the nonpregnant adult is shown in Figure 2.

• #17

  https://www.nhs.uk/conditions/underactive-thyroid-hypothyroidism/diagnosis/

  Less commonly, a thyroid antibody test may be recommended after a thyroid function test. This is to help diagnose or rule out autoimmune thyroid conditions, such as Hashimoto’s thyroiditis. A thyroid antibody test is only likely to be recommended if the GP suspects you have an autoimmune thyroid condition.

• #18 Hypothyroidism: Diagnosis and Treatment | AAFP

  https://www.aafp.org/pubs/afp/issues/2021/0515/p605.html

  Testing for the thyroid peroxidase (TPO) antibody does not help diagnose hypothyroidism; however, a positive test result suggests an autoimmune etiology. […] When signs and symptoms raise the index of suspicion, the clinician should obtain a serum TSH level. If the TSH level is high (greater than 4.5 mIU per L), a serum FT4 level should be obtained. A low FT4 level indicates clinical hypothyroidism, specifically autoimmune hypothyroidism (i.e., Hashimoto thyroiditis) if the TPO antibody test result is elevated. […] An elevated FT4 level may suggest a TSH-secreting tumor, and referral to endocrinology is warranted. […] If the TSH level is abnormal, the clinician should assess patient adherence, evaluate drug-drug interactions, and adjust the levothyroxine dosage every six to eight weeks until the TSH level normalizes.

• #19 Thyroid Function Tests | American Thyroid Association

  https://www.thyroid.org/thyroid-function-tests/

  In many patients with hypothyroidism or hyperthyroidism, lymphocytes react against the thyroid (thyroid autoimmunity) and make antibodies against thyroid cell proteins. […] Measuring levels of thyroid antibodies may help diagnose the cause of the thyroid problem. […] While detecting antibodies is helpful in the initial diagnosis of hypothyroidism due to autoimmune thyroiditis, following their levels over time is not helpful in detecting the development of hypothyroidism or response to therapy. TSH and FT4 are what tell us about the actual thyroid function or levels. […] A very high RAIU is seen in individuals whose thyroid gland is overactive (hyperthyroidism), while a low RAIU is seen when the thyroid gland is underactive (hypothyroidism).

• #20 Hypothyroidism (Underactive Thyroid): Symptoms, Causes, Tests, Treatments

  https://www.webmd.com/women/hypothyroidism-underactive-thyroid-symptoms-causes-treatments

  Thyroid antibody testing. This test looks for certain proteins in your blood. If thyroid antibodies are found, you may have an autoimmune condition, such as Hashimotos disease or Graves disease. […] Thyroid ultrasound. It may be ordered if your blood tests or exam are abnormal, to look for inflammation or unusual swelling or nodules around your thyroid gland.

• #21 Diagnosis of Underactive Thyroid (Hypothyroidism)

  http://www.askdrshah.com/app/underactive-thyroid/thyroid-diagnosis.aspx

  In order to diagnose Hashimoto’s Thyroiditis (as an etiology of primary thyroid failure), Anti-TPO antibody testing may be done. The Anti-TPO antibody, which was previously referred to as the Antimicrosomal antibody (AMA), is a useful marker for the diagnosis and management of autoimmune thyroid disease. […] Ultrasonography (USG) of the neck and thyroid can be used to detect nodules and infiltrative disease.

• #22 Patient Journey Thyroid – Diagnosis | American Association of Clinical Endocrinology

  https://www.aace.com/patient-journey/thyroid/diagnosis

  Thyroid antibodies: Indicates the likelihood of autoimmune thyroiditis being the cause of hypothyroidism. […] Increased TSH level in the blood is the most accurate indicator of hypothyroidism. […] A low level of free T4 is consistent with thyroid hormone deficiency. […] The first step is to talk with a health care professional or endocrinologist to ensure your thyroid gland is healthy and functioning properly.

• #23 Hypothyroidism (Underactive Thyroid): Symptoms, Causes, Tests, Treatments

  https://www.webmd.com/women/hypothyroidism-underactive-thyroid-symptoms-causes-treatments

  Thyroid antibody testing. This test looks for certain proteins in your blood. If thyroid antibodies are found, you may have an autoimmune condition, such as Hashimotos disease or Graves disease. […] Thyroid ultrasound. It may be ordered if your blood tests or exam are abnormal, to look for inflammation or unusual swelling or nodules around your thyroid gland.

• #24 Hypothyroidism – Causes, Symptoms, Treatment, Diagnosis – MedBroadcast.com

  https://medbroadcast.com/condition/getcondition/hypothyroidism

  If your doctor suspects hypothyroidism, tests can be performed to check how well the thyroid gland is functioning. Levels of T4 in the blood are measured, along with thyroid-stimulating hormone (TSH) that is produced by the pituitary gland. High levels of TSH suggest that the thyroid is underactive and that the pituitary is overcompensating by making excess hormones to stimulate the thyroid gland. […]

• #25 Thyroid Function Tests | American Thyroid Association

  https://www.thyroid.org/thyroid-function-tests/

  In many patients with hypothyroidism or hyperthyroidism, lymphocytes react against the thyroid (thyroid autoimmunity) and make antibodies against thyroid cell proteins. […] Measuring levels of thyroid antibodies may help diagnose the cause of the thyroid problem. […] While detecting antibodies is helpful in the initial diagnosis of hypothyroidism due to autoimmune thyroiditis, following their levels over time is not helpful in detecting the development of hypothyroidism or response to therapy. TSH and FT4 are what tell us about the actual thyroid function or levels. […] A very high RAIU is seen in individuals whose thyroid gland is overactive (hyperthyroidism), while a low RAIU is seen when the thyroid gland is underactive (hypothyroidism).

• #26 Hypothyroidism | Hashimoto’s Disease | MedlinePlus

  https://medlineplus.gov/hypothyroidism.html

  Hypothyroidism, or underactive thyroid, happens when your thyroid gland doesn’t make enough thyroid hormones to meet your body’s needs. […] Your health care provider may use many tools to make a diagnosis: A medical history, including asking about your symptoms, a physical exam, thyroid tests, such as TSH, T3, T4, and thyroid antibody blood tests, imaging tests, such as a thyroid scan, ultrasound, or radioactive iodine uptake test. A radioactive iodine uptake test measures how much radioactive iodine your thyroid takes up from your blood after you swallow a small amount of it.

• #27 Thyroid Tests – NIDDK

  https://www.niddk.nih.gov/health-information/diagnostic-tests/thyroid

  Health care professionals use thyroid tests to check how well your thyroid is working and to find the cause of problems such as hyperthyroidism or hypothyroidism. […] Thyroid tests help health care professionals diagnose thyroid diseases such as hypothyroidism when thyroid hormones levels are too low. […] A high TSH level most often means you have hypothyroidism, or an underactive thyroid. This means that your thyroid isn’t making enough hormone. […] A low level of T4 may mean you have hypothyroidism. […] Measuring levels of thyroid antibodies may help diagnose an autoimmune thyroid disorder such as Hashimoto’s disease—the most common cause of hypothyroidism. […] If your health care professional finds a nodule or lump in your neck during a physical exam or on thyroid imaging tests, you may have a fine needle aspiration biopsy to see if the lump is cancerous or noncancerous.

• #28 Become a member

  https://www.btf-thyroid.org/hypothyroidism-leaflet

  How is hypothyroidism diagnosed? […] By a physical examination and blood tests. A thyroid function blood test is a simple and accurate way to check whether your thyroid gland is working properly. An underactive thyroid is typically associated with a thyroid-stimulating hormone (TSH) level above the reference range and a thyroxine (FT4) level that is below the reference range. It is reasonable to have a test for thyroid antibodies to confirm that the cause is autoimmune. Other factors such as common illnesses that can temporarily alter blood test readings will need to be ruled out. Some medicines – prescribed and over-the-counter – can affect results, so it is important to tell your doctor about any medication you are taking. […] Sometimes the level of hypothyroidism is so slight that there are no obvious symptoms and it can only be detected by blood tests. It may be discovered as a result of blood tests for another autoimmune disorder or because there is a history of thyroid disorders in the family.

• #29 Houston Thyroid & Endocrine Specialists – Diagnosis of Hypothyroidism

  https://www.houstonendocrine.com/what-is-endocrinology/hypothyroidism/diagnosis-of-hypothyroidism

  Your Houston endocrinologist can diagnose hypothyroidism after he collects your medical history, examines your thyroid, reviews your medication list, and obtains specific blood tests which evaluate the hypothalamic-pituitary-thyroid axis. […] The most commonly ordered specific thyroid blood tests include TSH, Free T4, Total T3, and thyroid antibody levels. […] Your physical exam and medical history become very important when there is a possibility of hypothalamic or pituitary disease because the blood tests are less reliable in those situations. […] Depending on your specific medical history the normal TSH ranges commonly reported may not truly represent normal thyroid function. […] The differentiation of intrinsic thyroid disease from hypothyroidism due to diminished TSH secretion from hypothalamic or pituitary disease is a critical decision point.

• #30 Diagnosis of and screening for hypothyroidism in nonpregnant adults – UpToDate

  https://www.uptodate.com/contents/diagnosis-of-and-screening-for-hypothyroidism-in-nonpregnant-adults

  Diagnosis of hypothyroidism relies heavily upon laboratory tests because of the lack of specificity of the typical clinical manifestations. Overt hypothyroidism is characterized by a high serum thyroid-stimulating hormone (TSH) concentration and a low serum free thyroxine (T4) concentration, whereas subclinical hypothyroidism is defined biochemically as a normal free T4 concentration in the presence of an elevated TSH concentration. Central (secondary or tertiary) hypothyroidism is characterized by a low serum T4 concentration and a serum TSH concentration that is not appropriately elevated. […] This topic will review diagnosis of and screening for hypothyroidism in nonpregnant adults. The major clinical manifestations, causes, and treatment of hypothyroidism and the diagnosis and management of subclinical hypothyroidism are discussed separately. Screening for hypothyroidism during pregnancy and in neonates is also reviewed separately.

• #31 Hypothyroidism Secondary – Endocrine Surgery | UCLA Health

  https://www.uclahealth.org/medical-services/surgery/endocrine-surgery/patient-resources/patient-education/endocrine-surgery-encyclopedia/hypothyroidism-secondary

  Secondary hypothyroidism involves decreased activity of the thyroid caused by failure of the pituitary gland. […] The cause of secondary hypothyroidism is failure of the pituitary gland to secrete thyroid stimulating hormone (TSH). […] Risk factors for secondary hypothyroidism include being over 50 years old, being female, and having a history of pituitary or hypothalamic dysfunction. […] Laboratory tests to determine thyroid function include: Free T4 test, Total T3, Serum TSH — Results are generally low in secondary hypothyroidism because the pituitary is damaged. […] The purpose of treatment is to replace the deficient thyroid hormone. Levothyroxine is the most commonly used medication. […] In patients who have hypothyroidism caused by a pituitary tumor, surgery may be required. However, surgery may not cure the hypothyroidism, and thyroid replacement will still be needed. […] With early treatment, return to the normal state is usual. However, relapses will occur if the medication is not continued.

• #32 Houston Thyroid & Endocrine Specialists – Diagnosis of Hypothyroidism

  https://www.houstonendocrine.com/what-is-endocrinology/hypothyroidism/diagnosis-of-hypothyroidism

  A low free thyroxine level along with a low or normal TSH level should generally lead to an evaluation for the possibility of failure of other endocrine systems that rely on normal pituitary function. […] One method for evaluating a patient with suspected primary hypothyroidism involves an initial TSH determination. […] The presence of thyroid peroxidase antibodies (TPO antibodies) or thyroglobulin antibodies (TG antibodies) helps to distinguish among the causes of hypothyroidism and strongly suggests the presence of Hashimoto’s thyroid disease. […] Note that the TSH can range from high to low depending on the specific cause of low thyroid function. […] The likelihood of developing true hypothyroidism was defined as prescription of levothyroxine, or TSH above 4.50 mU/liter combined with free T4 below normal, in people without a history of hyperthyroidism.

• #33 Hypothyroidism – Hormonal and Metabolic Disorders – MSD Manual Consumer Version

  https://www.msdmanuals.com/home/hormonal-and-metabolic-disorders/thyroid-gland-disorders/hypothyroidism

  Hypothyroidism is underactivity of the thyroid gland that leads to inadequate production of thyroid hormones and a slowing of vital body functions. […] Usually only one blood test is needed to confirm the diagnosis. […] Doctors usually suspect hypothyroidism on the basis of the symptoms and findings on physical examination, including a slow pulse. […] Usually hypothyroidism can be diagnosed with one simple blood test: the measurement of TSH. If the thyroid gland is underactive, the level of TSH is high. […] In those rare cases of hypothyroidism caused by inadequate secretion of TSH, a second blood test is needed. This blood test measures the level of the thyroid hormone T4 (thyroxine, or tetraiodothyronine). A low level supports the diagnosis of hypothyroidism if the free level of T4 is also low. In that case, evaluation of the pituitary with pituitary function tests and imaging is generally performed.

• #34

  https://www.nhs.uk/conditions/underactive-thyroid-hypothyroidism/diagnosis/

  It’s very important that an underactive thyroid (hypothyroidism) is diagnosed as soon as possible. […] Therefore, you should see a GP and ask for a blood test if you repeatedly have symptoms of an underactive thyroid. […] A blood test measuring your hormone levels is the only accurate way to find out whether there’s a problem. […] The test, called a thyroid function test, looks at levels of thyroid-stimulating hormone (TSH) and thyroxine (T4) in the blood. […] A high level of TSH and a low level of T4 in the blood could mean you have an underactive thyroid. […] If your test results show raised TSH but normal T4, you may be at risk of developing an underactive thyroid in the future. […] The GP may recommend that you have a repeat blood test every so often to see whether you eventually develop an underactive thyroid.

• #35 Borderline Hypothyroidism: Symptoms, Treatment and More

  https://www.health.com/condition/thyroid/treatment-for-borderline-underactive-thyroid

  Subclinical, or „borderline,” hypothyroidism is an early form of hypothyroidism. This condition causes an underactive thyroid, which results in high thyroid-stimulating hormone (TSH) levels. […] A healthcare provider can diagnose borderline hypothyroidism using a blood test to check TSH levels. […] The endocrinologist will also order a blood test to measure the levels of two hormones: T4 and TSH. High levels of TSH, or above 4.0 to 4.5 milli-international units per liter (mIU/L), can indicate an underactive thyroid. T4 levels will be relatively normal in the case of borderline hypothyroidism. […] This blood test can usually confirm borderline hypothyroidism. […] The goal of treatment is to closely replicate normal thyroid functioning. You’ll need to take medication to replace the amount of thyroid hormone the gland can’t make if you have hypothyroidism.

• #36 Borderline Hypothyroidism: Symptoms, Treatment and More

  https://www.health.com/condition/thyroid/treatment-for-borderline-underactive-thyroid

  The American Thyroid Association (ATA) guidelines recommend levothyroxine therapy at TSH levels of 10 mIU/L or less if you meet any of the following criteria: There are clear symptoms of hypothyroidism, There’s evidence of atherosclerotic heart disease (hardening of the arteries) or heart failure, You have positive thyroid autoantibodies. […] Borderline hypothyroidism can progress to overt hypothyroidism, so some healthcare providers say it’s useful to take medication. […] A healthcare provider can help you weigh the costs and benefits of treatment in your case.

• #37 Hypothyroidism Investigation and management

  https://www.racgp.org.au/afp/2012/august/hypothyroidism

  Thyroxine replacement may be beneficial in some cases of elevated TSH associated with normal thyroid hormone levels, however, this remains controversial. […] Levothyroxine therapy is usually recommended where the serum TSH is greater than 10 mIU/L. […] Where the TSH is consistently between 5-10 mIU/L and the patient is symptomatic, a 3-6 month trial of levothyroxine replacement is appropriate. […] An algorithm for the management of subclinical hypothyroidism in the nonpregnant adult is shown in Figure 2.

• #38

  https://www.nhs.uk/conditions/underactive-thyroid-hypothyroidism/diagnosis/

  It’s very important that an underactive thyroid (hypothyroidism) is diagnosed as soon as possible. […] Therefore, you should see a GP and ask for a blood test if you repeatedly have symptoms of an underactive thyroid. […] A blood test measuring your hormone levels is the only accurate way to find out whether there’s a problem. […] The test, called a thyroid function test, looks at levels of thyroid-stimulating hormone (TSH) and thyroxine (T4) in the blood. […] A high level of TSH and a low level of T4 in the blood could mean you have an underactive thyroid. […] If your test results show raised TSH but normal T4, you may be at risk of developing an underactive thyroid in the future. […] The GP may recommend that you have a repeat blood test every so often to see whether you eventually develop an underactive thyroid.

• #39 Become a member

  https://www.btf-thyroid.org/hypothyroidism-leaflet

  A blood test result showing a slightly raised TSH level with a normal FT4 level indicates that you may have mild thyroid failure, also known as subclinical hypothyroidism and that you may have an increased risk of eventually developing hypothyroidism. You should have a regular thyroid function test and consult your doctor if you notice any symptoms, as you may benefit from treatment.

• #40

  https://www2.hse.ie/conditions/underactive-thyroid-hypothyroidism/diagnosis/

  It’s important to diagnose an underactive thyroid as soon as possible. […] Talk to your GP if you have symptoms of an underactive thyroid. Ask for a thyroid function blood test. […] If you are diagnosed with an underactive thyroid, you may need repeat blood tests to maintain your hormones at the correct levels. […] Your GP will do a blood test. A lab will check the hormone levels in your blood. […] A high level of TSH and a low level of T4 in the blood could mean you have an underactive thyroid. […] Your GP may advise a thyroid antibody test. This is to help diagnose or rule out conditions such as Hashimotos thyroiditis. […] Your GP may refer you to an endocrinologist. This is a specialist in hormone disorders.

• #41

  https://www2.hse.ie/conditions/underactive-thyroid-hypothyroidism/

  An underactive thyroid gland (hypothyroidism) means your thyroid gland is not producing enough hormones. […] The only accurate way of finding out if you have a thyroid problem is to have a thyroid function test. This is where a sample of blood is tested to measure your hormone levels. […] Treatment for an underactive thyroid involves taking daily hormone replacement tablets. […] You’ll have regular blood tests until the correct dose of levothyroxine is reached. This can take a little while to get right. When you’re taking the correct dose, you’ll have a blood test once a year to check your hormone levels.

• #42 Thyroid Blood Test Results: Understanding TSH Levels

  https://www.everydayhealth.com/hs/healthy-living-with-hypothyroidism/understanding-test-results/

  If your TSH levels are abnormally high, it could mean you have an underactive thyroid, or hypothyroidism. […] If your TSH is higher than 4.0 mU/L on repeat tests, you probably have hypothyroidism. […] Hypothyroidism is treated with daily medication. Taking synthetic thyroid hormone medication can bring your T4 and TSH levels back to their normal ranges. […] When you first start taking medication, your doctor will need to monitor your blood to fine-tune the dosage. […] A person who is newly diagnosed and taking medication for hypothyroidism should be tested every six weeks until the dosage is just right. […] If your TSH is still high and your symptoms haven’t subsided after 6 to 10 weeks, your doctor will likely increase the dose, and you’ll need your blood tested again after another 6 to 10 weeks.

• #43 Thyroid Blood Test Results: Understanding TSH Levels

  https://www.everydayhealth.com/hs/healthy-living-with-hypothyroidism/understanding-test-results/

  If your TSH levels are abnormally high, it could mean you have an underactive thyroid, or hypothyroidism. […] If your TSH is higher than 4.0 mU/L on repeat tests, you probably have hypothyroidism. […] Hypothyroidism is treated with daily medication. Taking synthetic thyroid hormone medication can bring your T4 and TSH levels back to their normal ranges. […] When you first start taking medication, your doctor will need to monitor your blood to fine-tune the dosage. […] A person who is newly diagnosed and taking medication for hypothyroidism should be tested every six weeks until the dosage is just right. […] If your TSH is still high and your symptoms haven’t subsided after 6 to 10 weeks, your doctor will likely increase the dose, and you’ll need your blood tested again after another 6 to 10 weeks.

• #44 Become a member

  https://www.btf-thyroid.org/thyroid-function-tests

  If the TSH level is high and the FT4 result is low this suggests an underactive thyroid (hypothyroidism) that requires treatment. […] Your doctor will interpret these tests, together with your symptoms and how you feel, in order to diagnose whether you have a thyroid disorder, how severe it is, and how to treat it. […] In hypothyroidism, a TSH test once a year will check that levels are within the reference range. […] If you have been diagnosed with hypothyroidism you will start treatment with levothyroxine – a synthetic version of the thyroxine (T4) produced by the thyroid gland. […] It is important for your health that the TSH level is within the reference range. […] Blood tests are currently the most accurate way to diagnose and manage thyroid disorders.

• #45 Hypothyroidism: Diagnosis and Treatment | AAFP

  https://www.aafp.org/pubs/afp/issues/2021/0515/p605.html

  Testing for the thyroid peroxidase (TPO) antibody does not help diagnose hypothyroidism; however, a positive test result suggests an autoimmune etiology. […] When signs and symptoms raise the index of suspicion, the clinician should obtain a serum TSH level. If the TSH level is high (greater than 4.5 mIU per L), a serum FT4 level should be obtained. A low FT4 level indicates clinical hypothyroidism, specifically autoimmune hypothyroidism (i.e., Hashimoto thyroiditis) if the TPO antibody test result is elevated. […] An elevated FT4 level may suggest a TSH-secreting tumor, and referral to endocrinology is warranted. […] If the TSH level is abnormal, the clinician should assess patient adherence, evaluate drug-drug interactions, and adjust the levothyroxine dosage every six to eight weeks until the TSH level normalizes.

• #46 Thyroid Blood Test Results: Understanding TSH Levels

  https://www.everydayhealth.com/hs/healthy-living-with-hypothyroidism/understanding-test-results/

  Because you’ll need to take thyroid medication every day for the rest of your life, even after the right dose is found, your hormone levels will be monitored regularly to be sure that your treatment is working properly. […] If you have hypothyroidism, the American Thyroid Association recommends that you keep your TSH within a narrow range of 0.5 to 2.5 mU/L.

• #47 Patient education: Hypothyroidism (underactive thyroid) (Beyond the Basics) – UpToDate

  https://www.uptodate.com/contents/hypothyroidism-underactive-thyroid-beyond-the-basics/print

  Hypothyroidism diagnosis can be confirmed through simple blood tests. […] The most common blood test for hypothyroidism is thyroid-stimulating hormone (TSH). TSH is the most sensitive test because it can be high even with small decreases in thyroid function. […] Thyroxine (T4), the main product of the thyroid gland, may also be measured to confirm and assess the degree of hypothyroidism. […] „Overt” hypothyroidism is diagnosed when the TSH is high and the T4 is low. „Subclinical” (very mild) hypothyroidism is diagnosed when the TSH is high but the T4 is still within the normal reference range for the population. […] Routine screening – All newborn babies in the United States are routinely screened for thyroid hormone deficiency. It is not clear if all adults should be tested for thyroid disease.

• #48 Hypothyroidism in Children | Children’s Hospital of Philadelphia

  https://www.chop.edu/conditions-diseases/hypothyroidism

  Nuclear medicine uptake and scan, which helps determine how well your childs thyroid tissue absorbs iodine, a key ingredient in making thyroid hormone. […] Who should be screened for hypothyroidism? […] All children who fail the thyroid portion of their newborn screening […] Anyone with symptoms of hypothyroidism […] Diagnostic evaluation begins with a thorough medical history and physical examination of your child. […] In most cases, hypothyroidism can be treated with thyroid hormone replacement pills (levothyroxine). […] If your baby has hypothyroidism and medication is prescribed, you can crush the tablet and give it to your baby with breast milk, formula or water. […] The majority of children with hypothyroidism who are compliant with their medication can achieve normal growth and development.

• #49 Hypothyroidism – Endocrine and Metabolic Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/endocrine-and-metabolic-disorders/thyroid-disorders/hypothyroidism

  Hypothyroidism is thyroid hormone deficiency. […] Diagnosis is with thyroid function tests. […] Serum thyroid-stimulating hormone measurement is the most sensitive test for diagnosing hypothyroidism. In primary hypothyroidism, there is decreased feedback inhibition of the intact pituitary, and serum TSH is always elevated, whereas serum free T4 is low. In secondary hypothyroidism, free T4 and serum TSH are low (sometimes TSH is normal but with decreased bioactivity). […] Diagnose primary or secondary hypothyroidism by testing serum TSH and T4. In primary hypothyroidism, TSH is elevated and T4 is low; in secondary hypothyroidism, both TSH and T4 are low. […] Screening for hypothyroidism is warranted in select populations (eg, neonates, older adults with risk factors) in which it is relatively more prevalent, especially because it can cause significant morbidity and its manifestations can be subtle. Screening is done by measuring TSH levels.

• #50 Hypothyroidism: causes, diagnosis and treatment – The Pharmaceutical Journal

  https://pharmaceutical-journal.com/article/ld/hypothyroidism-causes-diagnosis-and-treatment

  Hypothyroidism: causes, diagnosis and treatment. Hypothyroidism is a condition in which the thyroid gland does not produce enough thyroid hormone, often requiring pharmacological management. […] Recognise the symptoms of hypothyroidism and understand the different biochemical tests that are used to diagnose the condition. […] Diagnosis of hypothyroidism is based on patients’ presenting symptoms, alongside biochemical testing of TSH and free T4 levels (FT4). […] Testing of the ‘free’ hormone ideally provides a more reliable diagnostic result, as it only represents hormone available for action, as opposed to inactive protein-bound hormone. […] National Institute for Health and Care Excellence (NICE) guidance recommends that all patients presenting with new-onset atrial fibrillation, type 1 diabetes or other autoimmune disorders should be offered biochemical testing for thyroid dysfunction and that it should be considered in patients with unexplained depression and anxiety.

• #51 Why Thyroid Disorder Diagnosis Missed – Endocrinologist Perspective

  https://www.endocrinemds.com/blogs/why-thyroid-disorder-may-be-missed/

  The American Thyroid Association estimates that around 20 million Americans experience symptoms of thyroid disease; however, up to 60% of these people do not know they have a disorder. Undiagnosed thyroid conditions can put patients at risk of serious health complications, such as osteoporosis, cardiovascular disease, and infertility. […] One factor contributing to missed diagnoses of thyroid disorders is the failure of doctors to check thyroid levels during routine examinations. […] To ensure a thorough evaluation, requesting a complete thyroid panel that includes measurements of multiple hormones and thyroid antibodies like Thyroglobulin (Tg) is essential. […] Relying on outdated lab reference ranges for thyroid testing can lead to misinterpretation of results and potentially overlook underlying thyroid issues.

• #52 A Patient’s Guide to the Diagnosis and Treatment of Hypothyroidism – Thyroid UK

  https://thyroiduk.org/further-reading/about-thyroid-conditions/a-patients-guide-to-the-diagnosis-and-treatment-of-hypothyroidism/

  This article seeks to briefly review recent evidence related to the diagnosis and treatment of hypothyroidism and highlight the need for more reliable and effective standards of care to address the pervasive dissatisfaction among thyroid patients. […] The purpose of this brief commentary is to provide to doctors and patients who suspect inadequate diagnosis or treatment of hypothyroidism a contemporary update and a better understanding of effective diagnosis and treatment options they can pursue. […] Historically, hypothyroidism was diagnosed clinically using symptoms. […] After a sensitive test became available in 1985 for the pituitary hormone TSH (thyroid stimulating hormone), a remarkable shift in diagnosis was made from clinical evaluation to biochemical testing. […] This is based on American Association of Clinical Endocrinologists (AACE)/American Thyroid Association (ATA) Guidelines for Hypothyroidism that defined hypothyroidism as an underactive thyroid gland and assumed that: “A subnormal assessment of free T4 (FT4) serves to establish a diagnosis of hypothyroidism.”

• #53 Hypothyroidism with normal TSH: Causes and treatment

  https://www.medicalnewstoday.com/articles/hypothyroidism-with-normal-tsh

  Thyroid stimulating hormone (TSH) tells the thyroid gland to produce hormones. High TSH levels usually indicate that the thyroid is underactive and needs more stimulation in order to work. But, some people with hypothyroidism have normal TSH levels. Typically, TSH levels show as 0.44 milliunits per liter in a blood test. […] Yes, it is possible to have hypothyroidism and normal TSH levels in the blood. […] Most people with hypothyroidism have high TSH because their thyroid gland is not releasing enough hormones. In response to this, the body produces more TSH in order to get the thyroid to work. This results in high levels of TSH in the blood, which a doctor can test for. […] Healthcare professionals call this form of hypothyroidism primary hypothyroidism. It is the most common form of the condition. However, there are other types of hypothyroidism that do not always cause high TSH levels.

• #54 Why Thyroid Disorder Diagnosis Missed – Endocrinologist Perspective

  https://www.endocrinemds.com/blogs/why-thyroid-disorder-may-be-missed/

  Approximately 10% of individuals with normal lab results may test positive for antithyroid antibodies, indicating the presence of Hashimotos Disease, an autoimmune disorder that can lead to thyroid gland damage. […] Awareness of these commonly missed thyroid symptoms is vital in advocating for comprehensive thyroid evaluation. […] When diagnosing thyroid disorders, endocrinologists have specialized training and expertise in hormonal disorders, ensuring they can perform a comprehensive thyroid function assessment beyond simple blood tests. […] By working closely with patients, endocrinologists can provide education, guidance, and ongoing monitoring, ensuring optimal thyroid health and improved quality of life. […] Addressing diagnostic challenges in thyroid disorders requires concerted efforts to improve awareness and education and implement individualized treatment plans.

• #55 Understanding Hypothyroidism: Diagnosis and Treatment

  https://drbrighten.com/hypothyroid-diagnosis-treatment/

  In order to determine if you have hypothyroidism or not, it’s important to have testing done that goes beyond the standard Thyroid-Stimulating Hormone (TSH) test. […] A TSH test is one important piece of the puzzle, but to truly understand what’s happening, a range of tests is needed to help paint a complete picture of your thyroid function. […] Particularly in cases of Hashimoto’s thyroiditis, the autoimmune form of hypothyroidism, testing for thyroid antibodies is crucial. […] With subclinical hypothyroidism, your lab results might hover within the normal range, yet you can still experience symptoms. This is one reason why working with an experienced healthcare provider and discussing your symptoms is essential rather than just reviewing numbers on a lab report. […] Diagnosing and treating hypothyroidism commonly requires comprehensive diagnostic testing followed by a personalized treatment plan.

• #56 A Patient’s Guide to the Diagnosis and Treatment of Hypothyroidism – Thyroid UK

  https://thyroiduk.org/further-reading/about-thyroid-conditions/a-patients-guide-to-the-diagnosis-and-treatment-of-hypothyroidism/

  All three assumptions, which are fundamental to the Guidelines, have now been refuted by extensive scientific evidence. […] Numerous recent studies have raised serious concerns over the continued use of TSH testing as the predominant means of diagnosing the thyroid status of a patient or determining adequacy of treatment. […] The associated de facto SOC based predominantly on TSH should be reconsidered and amended as it is unwarranted and clearly ineffective for many patients. […] Diagnosis must always include a patient’s full medical history. […] Diagnosis must include an evaluation of symptoms, which reflect tissue thyroid responses, and the patient’s well-being. […] Where symptoms indicative of thyroid disease are present, an ultrasound of the thyroid is advisable. […] Symptomatic testing and case finding should include TSH, FT4 and FT3, arguably Reverse T3, TPO ab, TG ab (only if TPO is negative and TSH is high). […] Multiple symptoms typical of hypothyroidism, accompanied by low FT4 and FT3 levels, are strongly indicative of hypothyroidism. […] Both FT4 and FT3 levels should be individually monitored and increased as needed to relieve symptoms of hypothyroidism, without creating symptoms of hyperthyroidism.

• #57 Hypothyroidism (Underactive Thyroid) – NIDDK

  https://www.niddk.nih.gov/health-information/endocrine-diseases/hypothyroidism

  How do doctors diagnose hypothyroidism? […] Your doctor will take your medical history and perform a physical exam. A hypothyroidism diagnosis cant be based on symptoms alone because many of its symptoms are the same as those of other diseases. […] That’s why your doctor may use several thyroid blood tests and imaging tests to confirm the diagnosis and find its cause. […] Because hypothyroidism can cause fertility problems, women who have trouble getting pregnant often get tested for thyroid problems.

• #58 Hypothyroidism | Hashimoto’s Disease | MedlinePlus

  https://medlineplus.gov/hypothyroidism.html

  Hypothyroidism, or underactive thyroid, happens when your thyroid gland doesn’t make enough thyroid hormones to meet your body’s needs. […] Your health care provider may use many tools to make a diagnosis: A medical history, including asking about your symptoms, a physical exam, thyroid tests, such as TSH, T3, T4, and thyroid antibody blood tests, imaging tests, such as a thyroid scan, ultrasound, or radioactive iodine uptake test. A radioactive iodine uptake test measures how much radioactive iodine your thyroid takes up from your blood after you swallow a small amount of it.

• #59 A Patient’s Guide to the Diagnosis and Treatment of Hypothyroidism – Thyroid UK

  https://thyroiduk.org/further-reading/about-thyroid-conditions/a-patients-guide-to-the-diagnosis-and-treatment-of-hypothyroidism/

  All three assumptions, which are fundamental to the Guidelines, have now been refuted by extensive scientific evidence. […] Numerous recent studies have raised serious concerns over the continued use of TSH testing as the predominant means of diagnosing the thyroid status of a patient or determining adequacy of treatment. […] The associated de facto SOC based predominantly on TSH should be reconsidered and amended as it is unwarranted and clearly ineffective for many patients. […] Diagnosis must always include a patient’s full medical history. […] Diagnosis must include an evaluation of symptoms, which reflect tissue thyroid responses, and the patient’s well-being. […] Where symptoms indicative of thyroid disease are present, an ultrasound of the thyroid is advisable. […] Symptomatic testing and case finding should include TSH, FT4 and FT3, arguably Reverse T3, TPO ab, TG ab (only if TPO is negative and TSH is high). […] Multiple symptoms typical of hypothyroidism, accompanied by low FT4 and FT3 levels, are strongly indicative of hypothyroidism. […] Both FT4 and FT3 levels should be individually monitored and increased as needed to relieve symptoms of hypothyroidism, without creating symptoms of hyperthyroidism.

• #60 Diagnosing Hypothyroidism | NYU Langone Health

  https://nyulangone.org/conditions/hypothyroidism/diagnosis

  To diagnose hypothyroidism, your doctor asks about your symptoms and your medical history. […] A blood test confirms a diagnosis of hypothyroidism. […] The doctor takes a small sample of blood, which is analyzed in a laboratory to look for several markers, or indicators, of thyroid disease. The most sensitive of these is TSH. An elevated TSH level indicates that your thyroid has decreased function. […] If you are diagnosed with hypothyroidism, your doctor works with you to create a treatment program.

• #61 Recommended Tests for Hypothyroidism Diagnosis | Paloma Health

  https://www.palomahealth.com/learn/recommended-tests-hypothyroidism-diagnosis?srsltid=AfmBOopFbNX3fG92zeYiuAPv3f-56qBCCxV9xoyDbSY8f8OomeBxKlgm

  The Free T3 level can help evaluate the degree of severity of hypothyroidism and symptomology. […] When this occurs, thyroglobulin and thyroid peroxidase antibodies appear in your blood. […] But they do help determine the cause of your hypothyroidism. […] Thyroid hormone levels like TSH, Free T4, and Free T3 give you the best picture of your thyroid function. […] Knowing your thyroid levels is the first step to making sure your thyroid is functioning correctly. […] Never try to interpret your thyroid testing lab results yourself. Instead, work with a Paloma Health thyroid specialist to help you understand your results and create the best treatment plan for your underactive thyroid.

• #62 Hypothyroidism (underactive thyroid) – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/hypothyroidism/symptoms-causes/syc-20350284

  Blood tests are used to diagnose hypothyroidism. […] If you’re taking thyroid hormone medicine for hypothyroidism, follow your health care provider’s advice on how often you need medical appointments. […] Hypothyroidism happens when the thyroid gland doesn’t make enough hormones. […] Hypothyroidism that isn’t treated can lead to other health problems, including: […] Infants with hypothyroidism present at birth that goes untreated are at risk of serious physical and mental development problems. […] Hypothyroidism during pregnancy and isn’t treated, it raises the risk of pregnancy loss, premature delivery and preeclampsia. […] Hypothyroidism can lead to a higher risk of heart disease and heart failure. […] Hypothyroidism that goes without treatment for a long time can damage the peripheral nerves. […] Hypothyroidism may cause the thyroid gland to become larger. […] A myxedema coma may be triggered by sedatives, infection or other stress on the body.

Zobacz więcej