The short answer
In ACR TI-RADS, TR3 means a thyroid nodule scored exactly 3 points and is mildly suspicious. The ACR chart recommends a needle biopsy at 2.5 cm or more, follow-up ultrasound from 1.5 cm, and no biopsy below 1.5 cm.
TR3 means the nodule's ultrasound features added up to exactly 3 points. The ACR calls this mildly suspicious.
At TR3, size decides the plan: fine-needle aspiration at 2.5 cm or more, follow-up ultrasound at 1.5 cm or more, and no biopsy below 1.5 cm.
A TI-RADS level is an estimate from an image, not a diagnosis. Your care team explains what yours means for you.
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This page is for people whose thyroid ultrasound report gives a nodule a TI-RADS 3 (TR3) level. It explains what TR3 means, how size decides the next step, and what to ask your care team.
TR3 means exactly 3 points
ACR TI-RADS scores five ultrasound features of a thyroid nodule and adds up the points. The features are composition, echogenicity (how bright it looks), shape, margin, and bright specks called echogenic foci.
The total sets the level:
- TR1: 0 points.
- TR2: 2 points.
- TR3: 3 points.
- TR4: 4 to 6 points.
- TR5: 7 points or more.
TR3 is a single point total. The ACR describes it as mildly suspicious.
At TR3, size decides the recommendation
The ACR chart pairs each level with size cutoffs. At TR3 they are:
| Largest measurement | ACR TI-RADS recommendation |
|---|---|
| 2.5 cm or more | Fine-needle aspiration |
| 1.5 to 2.4 cm | Follow-up ultrasound |
| Under 1.5 cm | Ask your care team; the chart does not call for a biopsy |
These cutoffs are higher than at TR4 and TR5.
If the nodule is being watched
When a TR3 nodule is followed, the ACR reporting template suggests repeat ultrasound at 1, 3 and 5 years.
If your report gives a level but no plan, it is fair to ask what happens next.
What a TR3 cannot tell you
A TI-RADS level is a structured estimate of risk from an image. It is not a diagnosis. An ultrasound cannot tell for certain whether a nodule is cancer.
If a biopsy is done, the cells are reported with a different system, the Bethesda System. See What Does Bethesda Category Mean on a Thyroid Biopsy?
TI-RADS also says nothing about how well your thyroid works.
If you notice a change in your neck or new symptoms before your next scan, tell your care team rather than waiting. For severe trouble breathing, call 911.
Ask these before you leave
- Which features gave my nodule its 3 points?
- What is its largest measurement?
- Does that size mean biopsy, follow-up, or neither?
- Is there an older scan to compare with?
- When is my next ultrasound, and who books it?
Related pages
See What Does TI-RADS Mean?, What Does TI-RADS 4 Mean?, and Thyroid Nodule on Ultrasound: What Happens Next?
Sources
Common questions
Is TI-RADS 3 cancer?
No. TR3 is not a diagnosis. It means the nodule's ultrasound features scored 3 points on the ACR chart, which the ACR calls mildly suspicious.
Why was my TR3 nodule not biopsied?
The ACR chart recommends fine-needle aspiration for TR3 nodules only at 2.5 cm or larger. From 1.5 cm it recommends follow-up ultrasound. Below 1.5 cm it does not recommend a biopsy.
How often is a TR3 nodule checked?
When a TR3 nodule is followed, the ACR reporting template suggests repeat ultrasound at 1, 3 and 5 years. Your care team sets your schedule.
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Editorial status: Source checked — This page was written with AI assistance and then compared with the sources listed on it, looking for statements those sources do not back up. That check is not a sentence-by-sentence record and can miss errors. It is not a medical review, and it does not confirm the page is complete or right for your situation.
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