Unclear: Fna involves taking a small sample of tissue from a thyroid nodule. The results tell us what the probability is that the nodule is benign. When the report says it is benign, there is still a small possibility (3-5%) that the sample missed a cancer. That is why we continue to follow these nodules, and if they enlarge we look to repeat the fna.
Answered 10/31/2014
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