My TSH level is 12.87, I got put on sythroid, how do I know it's not thyroid cancer?

My dr. did not run any other blood test (he's my GP). He says I do not need to go to an endocrinologist. How do I know the level is n ot from a thyroid cancer? I'm 38, female, have had 3 children. I'm a bit paranoid because my brother in law (no blood relation) is my age and has thyroid cancer.

User Comments

  1. If you feel strongly about this, ask your Dr. to do a thyroid ultra sound.
    I have had several done, it is painless, and will show exactly what is going on in there.
  2. You're female, of the right age, and most likely it's a dying thyroid. If the next blood test comes out fine, that's your indication it's not cancer -- and this test is way cheaper to run.

    My own GP does a similar thing - if he thinks but is not certain it is something, he gives me meds for it and if it works, he has a diagnosis. It's way cheaper in the long run and keeps insurance prices down -- a good thing from my perspective.
  3. It makes sense to get a second opinion. I would. It'll make you feel better and you'll have two view points. If there is a difference, then you get a THIRD... OR go with a biopsy.... but just go for a second opinion, at this point....
  4. The thyroid functions as a negative feedback loop: if the thyroid hormones (T3, T4) get too high they will suppress the production of TSH from the Pituitary. Too low of levels will allow TSH to be released. A level of over five is too high, so you will probably benefit from synthroid. A thyroid malignancy would be unlikely to produce too little of thyroid hormones and , therefore, unlikely to cause an elevated TSH. My impression is that your doc has done ok so far and that you'll feel better after being on Synthroid for a while (it takes a few days to work.)
  5. If you are on synthroid, it is not likely that you have cancer. Did they do any further tests other than a blood test? If not, I would get back to the doctor and ask for further results. I know many people who are on med for their thyroid, my sister, son, and myself. It seems hereditary. Relax...you should be fine!