No: Truly benign thyroid nodules do not become malignant. However, if a nodule biopsy is read as "benign", there is still a small chance that the area sampled was not the correct area, and missed an area that was cancerous. That is why we continue to monitor nodules that are benign to see if they are changing in a way that would require another biopsy.
Answered 5/19/2019
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Not 100%: If the nodule is still in your neck, there is no way to know that it is 100% benign. Even if you had a biopsy before and it came back benign, there is still a chance that the spot of cancer was missed during the first biopsy. This is why we don't "poo poo" it away after 1 biopsy but continue to follow the thyroid nodule to monitor for size changes. All said, the risk of cancer is very small.
Answered 5/19/2019
5.2k views
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