The Needle Biopsy (FNA)

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Needle Biopsy (FNA)
Expert guides · Written by a board-certified thyroid surgeon
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Your doctor recommended a thyroid biopsy — or you just got the results back. This series explains exactly what FNA biopsy involves, what every Bethesda category means, and when further action is needed.

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Walk through your FNA result step by step. Understand exactly what your Bethesda category means, the cancer risk, and the specific next steps your pathologist's report points to.

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Biopsy Analysisv1.0
Bethesda Category
III
Atypia of Undetermined Significance
Cancer Risk
10–30%
Adequacy
Satisfactory
Next Step
Molecular Test
Or
Repeat FNA
Sample Output

Thyroid Biopsy (FNA): Does It Hurt? What to Expect Start to Finish

Of all the questions patients ask before a thyroid biopsy, one comes up more than any other: does it hurt? The honest answer is that most…

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Your Thyroid Biopsy Results Explained: A Patient Guide to the Bethesda System

You had the biopsy. You waited several days. And now the result has arrived containing a word or Roman numeral that means nothing to you.…

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Your Thyroid Biopsy Came Back “Indeterminate”: What Bethesda III (3) and IV (4) Really Mean

You had the biopsy. You waited for the results. And the answer that came back was not the one you were hoping for.

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Molecular Testing for Thyroid Nodules: The Advance That Can Help You Avoid Unnecessary Surgery

Every year, thousands of patients with thyroid nodules undergo surgery that turns out to be unnecessary. The nodule is removed, the…

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Bethesda 5 Thyroid Biopsy: Suspicious for Malignancy Explained

A Bethesda 5 result means your biopsy is suspicious for cancer, but not yet definitive. The malignancy risk is roughly 60 to 75%.

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Bethesda 6: Malignant biopsy result and what comes next

A Bethesda 6 result confirms thyroid cancer with a probability greater than 97%. This is a frightening result to read on a piece of paper.

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