How young can people be and get diagnosed with thyroid cancer?

Almost any age. While most people who get thyroid cancer are older, it can occur in teenagers and in even those less than 10 years old. Those who have been exposed to radiation (either through radiation treatment for other types of cancer, environmenal sources, etc) are more likely to develop thyroid cancer, but radiation exposure is not necessary.
It varies. Depending on the type of cancer, different age groups are affected. Follicular carcinoma can be in older age groups, while papillary carcinomas are seen in the 2nd and 3rd decades, and older groups.

Related Questions

How risky is it for someone with thyroid cancer to get sick with a cold?

It's not. Now, if a patient had the horrible anaplastic thyroid cancer, and was undergoing some active treatment, then, of course, any illness would be a detriment. Papillary or follicular thyroid cancers are well managed in most patients, and the common cold would not particularly affect the patient, any more than the general population. Good luck.

I had my thyroid removed due to thyroid cancer. Can't seem to get meds regulated. Current dr. Is questioning if my body is absorbing my medication?

Thyroid. Take the medicine first thing in the morning on empty stomach to make sure you don't have any interaction with other medicine or food. If you have problems regulating the level, perhaps you should ask your doctor if you need to be seen by an endocrinologist to help you.
Check T3 (liothyronine) Sometimes your body doesn't convert T4 (levothyroxine) into active t3. You may do better with a mixture is t4/t3 like wes-throid or Nature-Throid or just adding some Cytomel (liothyronine) to your regimen.

Could you with thyroid disease still get thyroid cancer?

Thyroid disease? You will need to clarify what you mean by thyroid disease. Most common thyroid problem is hypothyroidism (low hormone levels). You you can still get thyroid cancer. You should remember that thyroid nodules (lumps) are common, especially in women and when we get older. The chance of cancer in a nodule is 5% or less. Try not to worry until an evaluation has been done.

If your T4 is high. Can you still get thyroid cancer?

T4 and cancer. Thyroid cancer is entirely independent of thyroid function. High T4 is unrelated to cancer. In patients with thyroid cancer who have had thyroidectomy (removal of thyroid), thyroglobulin (but not t4) may be used as a serum marker of residual/recurrent disease.
Sure. If you have a thyroid, you can get thyroid cancer, even if high t4. Nodules are the issue, benign or malignant.

Is it dangerous for someone with thyroid cancer to get sick with a cold?

No. Thyroid cancer generally does not affect immune system but if you are on certain medications such as immunosuppressants, then it's best that you check with your doctor.
Not usually. Unless there's something else going on, like immunosuppression or obstructed breathing, the run-of-the-mill, every day type of cold should not be life threatening to a patient with thyroid cancer.

Is thyroid cancer notorious for hiding anywhere in the body? Is that why I have to get follow up whole body iodine scans?

Yes. It hides out in bones. Hopefully it was caught in time.
Depending on type. It can met to bone, but that is uncommon. Typically the scan just covers the entire body so all the information collected is utilized. Thyroid cancer, especially at your age, is not as likely to be the type to have distant mets.

Will I get thyroid cancer if I have hypothyroidism?

Very unlikely. If you are hypothyroid, the chance of thyroid cancer is very low. If there is not thyroid mass/lump, then don't worry about it.

Is it likely to get thyroid cancer if your mother had it twice before?

Thyroid. Certain types of thyroid cancers have a genetic component ie medullary. Thyroid cancer is often seen more in patients with hashimotos disease which can run in families.

If I get thyroid cancer, would I be able to get rid of it using radioactive treatment?

Thyroid cancer. It will depend on the type of thyroid cancer- whether it is differentiated or undifferentiated. Treatment will include surgery to remove thyroid cancer- either total or partial-then depending on the surgical margin, lymph nodes involvement, possible residual disease etc- if the cancer is differentiated then a radioiodine therapy will be helpful. Not in the undifferentiated type however.
Not by itself. For most thyroid cancers, surgery is the treatment of choice. Depending on the stage, surgery may need to be followed by radioactive iodine. The majority of cancers are completely removed in this manner, although follow up is important to check for recurrence.
Not alone. Thyroid cancer has many types. Those that produce colloid will often respond to radioablative (radioactive) iodine therapy. However, the volume of radiation required to achieve this without doing surgery first is too high to be clinically useful. The tumor does need to take up iodine for the therapy to work.
Some cancers. Some cancers of the thyroid are functional and concentrate iodine. Such cancers are susceptible to treatment with radioactive iodine. The tumors that do not concentrate iodine would not be suitable for radio iodine treatment.