We found out my husband had two nodules on his thyroid after he was in a bad ski accident (a snowboarder landed on his head) and had to have a whole body MRI because he had been unconcious for several days and nothing showed up on the CT-scan (in addition to the thyroid nodules, we found he also had nodules on his spleen).

Anyway, he has to see the endocrinologist every six months to measure the size of his thyroid nodules, and once per year they take a biopsy.

The endocrinologist said that if the nodules got larger than 4 cm?/mm? (don't remember if it was cm or mm...but it was DEFINATELY *4*) they would have to remove his thyroid.

The funny thing was that his sister had her thyroid removed for the same reason. Nodules on her thyroid that got too large.