Thyroid Artery Embolization (TAE): How It Works, Who Qualifies, and What to Expect

Save Your Thyroid with Jennifer Holkem, Episode 128 | Guest: Dr. Sean Golden, Interventional Radiologist, UW Health

If you have a large goiter, you may have been told surgery is your only option. It isn't. Thyroid artery embolization (TAE) is a minimally invasive procedure that shrinks an enlarged thyroid by blocking its blood supply, and patients go home the same day.

In this episode, I talk with Dr. Sean Golden, an interventional radiologist at the University of Wisconsin-Madison. He co-built the TAE program at UW Health with Dr. Matthew Niemeyer. We go through the procedure step by step, along with recovery, imaging technology, research, and who is and isn't a good candidate.

What is thyroid artery embolization?

TAE treats an enlarged thyroid by cutting off the blood that feeds it. An interventional radiologist threads a thin catheter through a tiny incision, usually at the wrist and sometimes at the groin. Using live X-ray guidance, the catheter is steered to the arteries supplying the thyroid, and tiny permanent particles are injected to block them. Without its blood supply, the gland gradually shrinks.

Unlike ablation, which goes directly through the neck into the nodule, TAE never touches the thyroid itself.

What happens during a TAE procedure?

Dr. Golden walked through it as if I were a patient in his consult room:

1. Prep. You arrive in the morning, change into a gown, and get an IV for sedation and basic bloodwork.
2. Sedation and numbing. You feel sleepy and relaxed but breathe on your own, with no breathing tube. Lidocaine numbs the access site.
3. Access. A roughly five-millimeter incision is made, small enough that no stitches are needed.
4. Navigation. The catheter is guided to the thyroid arteries, and contrast dye confirms the location.
5. Embolization. Permanent particles (Embospheres, 100 to 300 microns) are injected until the artery's branches shut down while the main trunk stays open.
6. Safety checks. CT or cone beam CT scans during the procedure confirm no particles are heading to unintended vessels.
7. Recovery. The procedure takes about 1.5 to 2 hours. You're monitored for about two hours afterward, then you go home.

What is recovery like after TAE?

The procedure itself is essentially pain-free. Afterward, expect:

• Neck pain that may radiate to the jaw or face, usually lasting two to four weeks and typically manageable with ibuprofen or Tylenol
• Fatigue and a low-grade fever, part of what's called post-embolization syndrome, which is the body's inflammatory response
• A quick return to work. Many patients go back the next day, avoiding very vigorous activity for about a week

For patients with more symptoms, a short course of steroids often helps.

How much will my goiter shrink, and how long does it take?

Dr. Golden's average is about 60% volume reduction, consistent with some of the largest published studies. Timing looks like this:

• Some patients notice changes within two weeks
• Most shrinkage occurs by about three months (around 50%)
• Maximum shrinkage arrives around six months

Patients commonly report less neck tightness and easier swallowing and breathing. Those on hyperthyroidism medications are often able to reduce or stop them.

Who is a good candidate for TAE?

TAE tends to fit patients with:

• A large gland, roughly 80 mL or more
• A single large nodule, roughly 20 to 25 mL or more
• A substernal goiter, one that extends below the breastbone
• Large inferior thyroid arteries, which are the safest to access
• A desire to avoid surgery

These size cutoffs are roughly where ablation becomes less effective or needs multiple sessions.

Who is not a good candidate?

TAE may not be the right choice if:

• The arteries are too small to access safely
• The goiter is growing rapidly. Every patient is biopsied first, but surgery may be the safer route if cancer is a concern
• The stroke risk is a dealbreaker. Dr. Golden estimates about a 1% risk. It has never occurred in his practice, and published data are limited

What is EmboAssist, and why does a hybrid CT suite matter?

UW's hybrid CT angiography suite puts live X-ray and a full diagnostic CT scanner in the same room, giving sharper images than the cone beam CT most programs use. That helps detect any particles heading somewhere they shouldn't.

EmboAssist, from GE, is technology Dr. Golden adapted from prostate, knee, and hemorrhoid embolization. It builds a 3D map of the vessels and displays the path to the thyroid artery on the live X-ray screen. The result is faster access, less contrast, and less chance of entering the vertebral or carotid arteries.

What does the research say so far?

Dr. Golden's team is studying:

• Contrast deposition: whether contrast lingering in the gland after treatment predicts how much it shrinks
• Hormone changes: thyroid hormone typically rises at 48 to 72 hours, peaks around two weeks, and normalizes by four to eight weeks. Parathyroid hormone hasn't changed in their experience
• Publications: a technique and review article is expected in RadioGraphics, and the team is participating in the PROTECT trial

One thing to tell your doctor after TAE

After TAE, and after ablation, treated nodules can look darker (hypoechoic) on ultrasound. To a physician who doesn't know your history, that can look suspicious for cancer. It's a normal, expected finding. If you get a follow-up ultrasound elsewhere, make sure the physician reading it knows what was done.

How do I see Dr. Golden's team at UW Health?

UW accepts patient self-referrals, including from outside Wisconsin. They ask that you've already seen an endocrinologist and an endocrine or ENT surgeon so you understand all your options. Most visits are virtual, and you travel only for the treatment itself. Patients are followed for five years.

To find a physician near you who performs TAE or other non-surgical thyroid procedures, visit saveyourthyroid.org and click Find a Physician.

Frequently asked questions

Is TAE a surgery?
No. It's a minimally invasive, image-guided procedure done through a small puncture, usually with no stitches.

Will I need general anesthesia?
No. You receive sedation through an IV and breathe on your own.

Can TAE be repeated?
Yes. Dr. Golden uses particles rather than coils specifically to keep retreatment possible if an artery reopens.

Does TAE work for Graves' disease?
His team has treated one patient with Graves' who responded well. Graves' patients may have a somewhat higher chance of needing a second procedure.

Will TAE replace ablation or surgery?
Dr. Golden doesn't think so. In his view, all of these treatments are needed, and TAE will find a role for certain patients.

Episode resources

• Podcast: SaveYourThyroidwithJen.com
• Patient site and physician finder: saveyourthyroid.org
• One-on-one patient navigation: saveyourthyroidwithjen.com/patient-navigation-services
• Watch the TAE playlist on the Save Your Thyroid with Jen YouTube channel

This podcast is for informational purposes only and is not medical advice. No endorsement is implied for any product, treatment, or physician mentioned. Please talk through your own situation with your care team.