Thyroid Biopsy

The thyroid biopsy is a procedure in which a sample of thyroid tissue is withdrawn for laboratory examination. The sample can be withdrawn through a needle, or a surgical incision may be made to obtain a piece of thyroid tissue.

The exam is generally performed when a lump or a nodule is detected in the thyroid. The test may also be ordered if the thyroid gland is enlarged and the cause is not apparent. The needle used in fine needle aspiration is so thin, the whole procedure feels like a quick injection. There is no pain or tenderness at the site after the test. In large needle biopsy, a stinging needle prick may be felt when the local anesthetic is injected. The site may be sore for a few hours and tender for a day or two after the test.