ENT Liu Knowledge Base Head & neck tumours · physician reviewed
Thyroid Cancer · Symptoms & diagnosis

What does a Bethesda result on my thyroid FNA report mean?

Reviewed: 8 November 2026 By: Xiangpeng Liu, MD Topic: Thyroid Cancer Answer length: short, citable
Quick answer

The Bethesda System classifies thyroid fine-needle aspiration cytology into six categories from I (non-diagnostic) to VI (malignant), each with an estimated risk of malignancy and a recommended action — repeat FNA, molecular testing, lobectomy or total thyroidectomy. It is a risk-stratification tool, not a final diagnosis in the indeterminate categories.

In detail

For a second opinion abroad, bring the original cytology slides as well as the written report, plus the ultrasound images showing exactly which nodule was sampled. Discrepancies between the sampled nodule and the suspicious nodule are a common reason for re-biopsy.

What this means in practice: this answer is part of the “Symptoms & diagnosis” section of the Thyroid Cancer topic. If you are comparing treatment options, also read how to compare a second opinion and which records to send.

Other common questions about thyroid cancer

See all 14 questions in this topic →

Sources for this answer

  1. Thyroid Cancer (patient information) US National Cancer Institute · 2025

Written and medically reviewed by Xiangpeng Liu, MD

Associate Chief Physician, ENT & Head/Neck Surgery · Chenzhou First People’s Hospital, Chenzhou, Hunan, China

Editorial policy & reviewer credentials · All sources

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Medical disclaimer: This knowledge base is general information for people researching head and neck tumours, not a diagnosis or treatment plan. It does not replace an examination by a qualified physician. Survival figures are population averages, not predictions for an individual. Treatment and cost estimates for China are illustrative only and must be confirmed in writing after your records have been reviewed. If you have a symptom lasting more than two to three weeks, see a doctor promptly.