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Doctor insights on: If My Thyroid Blood Test Results Were Negative Could I Have Thyroid Cancer

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Could you tell me if someone has thyroid cancer wouldn't the CBC blood test show that something was abnormal?

Could you tell me if someone has thyroid cancer wouldn't the CBC blood test show that something was abnormal?

Cancer: Likely not. The cancer if it spread would likely just affect local structures. Ultrasound is the best method to detect it. Certain lab tests screen for certain types of thyroid cancer. ...Read more

Dr. Barry Rosen
4,214 doctors shared insights

Cancer (Definition)

Cancer is a group of diseases that is characterized by uncontrolled cell growth leading to invasion of surrounding tissues that spread to other parts of the body. Cancer can begin anywhere in the body and is usually related to one or more genetic mutations that allow normal cells to become malignant by interfering with internal cellular control mechanisms, such as programmed cell death or by preventing ...Read more


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I have a couple of 6mm lymp nodes and my mchc came back low on my blood test. Does one have to do with the other? I also had thyroid cancer last year.

I have a couple of 6mm lymp nodes and my mchc came back low on my blood test. Does one have to do with the other? I also had thyroid cancer last year.

Cannot say: cannot say in your particular case, but generally, 6mm lymph nodes are not necessarily significant. MCHC low implies low iron, but can be wtih a chronic disease (active or recovering from cancer, among many many others). BUt could also theoretically be the beginning of a return of the cancer. ...Read more

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If you have thyroid cancer will your TSH level in your blood test be bad?

If you have thyroid cancer will your TSH level in your blood test be bad?

No: Your blood tests can all be completely normal with thyroid cancer. There is absolutely no correlation between your blood tests and thyroid cancer. The only way to diagnose thyroid cancer is by fna of a suspicious nodule. ...Read more

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If you have thyroid cancer will your TSH level in your blood test abnormal?

If you have thyroid cancer will your TSH level in your blood test abnormal?

No: A physician cannot tell that you have thyroid cancer by looking at the TSH level. The best way to evaluate for malignancy in a thyroid is to perform a fine needle biopsy. ...Read more

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If you have thyroid cancer will your TSH level in your blood test be abnormal?

Not usually: Most people with thyroid cancer have thyroid glands that work normally, and have a normal TSH - at least until they are removed! it is possible to have thyroid cancer and have an abnormal tsh, but this is uncommon. ...Read more

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I'm just wondering, if you have thyroid cancer will your TSH level in your blood test be off?

I'm just wondering, if you have thyroid cancer will your TSH level in your blood test be off?

Not necessarily: Tsh stands for thyroid stimulating hormone. It does exactly that-- tells your thyroid to make thyroid hormone. If your thyroid isn't making enough hormone, your TSH will increase. And if your thyroid is making too much hormone, your TSH will go down. But cancer is usually not the cause for a high or low tsh. And you can have a completely normal TSH and still have thyroid cancer. Hope that helps! ...Read more

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My blood test showed an elevated level of tg antibodies. Does that mean I have cancerous cells running around? Had papillary thyroid cancer a year ago

Not necessarily.: Having elevated tg antibodies primarily means that the more important tg test itself will be falsely lower than its true value. (no conversion formula exists.) if your tg antibodies are only 20 or so, with an undetectable tg level, it is hard to know what that means. If your tg antibodies are much higher, then concern for the presence of thyroid cancer would increase. ...Read more

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I had my thyroid removed in 1991 due to thyroid cancer, have been on Synthroid until approx 9 months ago .. . I was really sick before Christmas this year and thought it was the flu . . . dr. did a thyroid blood test and ths level is 477 . . . he said t

I had my thyroid removed in 1991 due to thyroid cancer, have been on Synthroid until approx 9 months ago .. . I was really sick before Christmas this year and thought it was the flu . . . dr. did a thyroid blood test  and ths level is 477 .  . . he said t

Must take thyroid: I don't know what your question is, but it appears that you were not taking Synthroid (thyroxine) for many months. This is very dangerous. Your body requires thyroid hormone to function correctly. Since you had your thyroid removed, there is no alternative to taking thyroid hormone. Having had thyroid cancer, it is essential that the TSH be normal. ...Read more

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Are thyrogen injections and blood work as effective as I123 and scan in determining thyroid cancer reccurence?

Are thyrogen injections and blood work as effective as I123 and scan in determining thyroid cancer reccurence?

Thyroid cancer: A thyroidologist or endocrinologist are best qualified to follow a patient who has been treated for thyroid cancer. Scanning of the thyroid area is one way of detecting recurrence, but other more specialized methods may be used by specialists in this field. ...Read more

Dr. Quang Nguyen
310 doctors shared insights

Thyroid Cancer (Definition)

Thyroid cancer arises in the thyroid gland. It usually presents as a painless thyroid nodule. Most are papillary-follicular type and have a very good prognosis. Less common are medullary cancers, with an intermediate prognosis. Anaplastic cancers of the thyroid have a poor prognosis and are uncommon. Treatment of thyroid cancers involves removal ...Read more


Dr. Ronald Krauser
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