can thyroid cancer cause hyper-/hypothyroidism?

Question

For hyperthyroidism, I know it's caused by nodules in the thyroid - are these nodules necessarily malignant? And can hyperthyroidism cause swelling of lymph nodes? How about thyroid cancer? For hypothyroidism, is there any way it can be realted to cancer?

Answer 1

Yes. It is possible.

Hypothyroidism is the disease state caused by insufficient production of thyroid hormone by the thyroid gland. There are several distinct causes for chronic hypothyroidism, the most common being Hashimoto's thyroiditis and hypothyroidism following radioiodine therapy for hyperthyroidism. Secondary hypothyroidism occurs if the pituitary gland is damaged by a tumor, radiation, or surgery so that it is no longer able to instruct the thyroid to make enough hormone.

The severity of hypothyroidism varies widely. Patients are classified as "subclinical hypothyroid" if diagnostic findings show thyroid hormone abnormalities, but they do not exhibit any symptoms. Others have moderate symptoms that can be mistaken for other diseases and states. Advanced hypothyroidism may cause severe complications, the most serious one of which is myxedema.

Hypothyroidism results from sporadic inheritance, sometimes autosomal recessive. To diagnose the condition, levels of T4 (thyroxine) and TSH (thyroid stimulating hormone) are measured. The disease may also be caused by a lack of thyroid gland or pituitary hormone. Treatment comes in the form of thyroid hormone replacement therapy.

Thyroid cancer is cancer of the thyroid gland. There are four forms: papillary, follicular, medullary and anaplastic. The most common forms (papillary and follicular) are slow growing and may recur but patients under 45 rarely die, and the medullary form also has a good prognosis if it is restricted to the thyroid gland and a poorer prognosis if there has been spread; the anaplastic form is fast-growing and poorly responsive to therapy.

Thyroid nodules are diagnosed by ultrasound guided fine needle aspiration (USG/FNA) or frequently by thyroidectomy (surgical removal and subsequent pathological examination). As the thyroid cancer can uptake iodine, radioactive iodine is a commonly used modality in thyroid carcinomas. However, it is follwed by TSH suppression by Thyroxine therapy.

Answer 2

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Answer 3

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RE:
can thyroid cancer cause hyper-/hypothyroidism?
For hyperthyroidism, I know it's caused by nodules in the thyroid - are these nodules necessarily malignant? And can hyperthyroidism cause swelling of lymph nodes? How about thyroid cancer? For hypothyroidism, is there any way it can be realted to cancer?

Answer 4

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That is called a goiter, and it has no other causes. If you have all of the other symptoms of hypothyroidism too, in addition to the goiter, you need to get treatment for your hypothyroidism. Get your ducks in a row first though. You had a TSH blood test. Thyroid stimulating hormone. You didn't have a blood test for pot. It's really hard to get a doctor to take you seriously when you have a thyroid condition in the first place (as you found out). You have to do your research before you go in, know more than the doctor, and know what tests to demand. If you do things like get he names of the tests wrong, you'll never get treatment. That being said, TSH is a useless test. All it means is that you need further testing. Every Dr. will use it for diagnosis, but it can't be used for diagnosis. It is an indirect test, so it's ridiculous to diagnose based on it. You need a direct test of your thyroid. That is Free T3 and Free T4. See how those come out. They are the definitive tests for a thyroid problem. It took me until my 3rd doctor to get a diagnosis of my thyroid problem, and until my 6th doctor before I could get some help with my symptoms. So I know what you are going through. Hang in there. Find a new doctor. If that one can't help you, find another one.

Answer 5

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Answer 6

Yes, thyroid cancer causes hypothyroidism. While treating of thyroid cancer, it may need to remove the damaged part of thyroid gland or may need to remove the complete thyroid gland. In that case, you will have hypothyroidism. And in some cases, the medications of thyroid cancer can affect the functioning of thyroid gland, this will lead to hypothyroidism. You can find more information at http://seahealth.org/hypothyroidism.

Answer 7

Thyroid cancer is usually related with hypothyroidism or euthyroid (normal thyroid function).
Nodules of hyperthyroidism are not necessarily malignant.
Hyperthyroidism does not directly cause lymph node swelling but cancer does when it spreads through the lymphatics or lymph nodes. Thyroid cancer though spreads usually by direct extension and possibly by blood.
Hypothyroidism may be caused by a growing thyroid tumor, benign or malignant, iodine deficiency in the diet, an inflammatory condition of the thyroid, or lack of hormonal stimulation (multi-endocrine problem).

Answer 8

Hyperthyroidism is more often related a diffuse enlargement of the thryroid, although it can be nodular. It has no relatiion to malignancy. The lymph nodes are only involved if a thyroid cancer metastases to them. Hypothyroidism is not related to cancer, mostly thyroiditis.

Answer 9

Thyroid disease is one of the most common health problems we face today. From a practical standpoint, there are many ways to approach this issue. Learn here https://tinyurl.im/aH6rD Hypothyroidism, or underactive thyroid, is a very common problem, and there are many reasons for this, including drinking chlorinated and fluoridated water, and eating brominated flour. Chlorine, fluoride, and bromine are all in the same family as iodine, and can displace iodine in your thyroid gland. Secondly, many people simply aren't getting enough iodine in their diet to begin with. The amount you get from iodized salt is just barely enough to prevent you from getting a goiter.

Answer 10

Most often the first symptom of thyroid cancer is a nodule in the thyroid region of the neck, but only 5% of these nodules are malignant. Sometimes the first sign is an enlarged lymph node. Other symptoms that can be present are pain, changes in voice and symptoms of hypo- or hyperthyroidism.

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