Can thyroid surgery be done without a scar on the neck?

The answer to the question as asked is yes. The thyroid can be reached through an incision in the armpit, or through the inside of the lower lip, leaving the front of the neck unmarked. Gasless transaxillary endoscopic thyroidectomy was proposed at Yonsei University in Seoul in 2001 and the robotic version followed in 2007, and Korea has done more of these operations than anywhere else.

Wanting to avoid a scar across the front of the throat is not vanity. The people having these operations are overwhelmingly young women, the scar sits where nothing covers it, and this publication has reported at length that many of these cancers should probably never have been operated on at all. The question worth answering is not whether the wish is legitimate. It is what the trade is.

The figure the approach is promoted on#

A meta-analysis of 199 studies covering 304,352 thyroid operations broke transient recurrent laryngeal nerve injury down by how the gland was reached.

Read quickly, that says the scarless route through the armpit is five times safer for the nerve that controls the voice. It is the number a patient is most likely to be shown.

What happened when one centre looked properly#

A Korean institution reported 1,000 consecutive single-port transaxillary robotic thyroidectomies performed between 2021 and 2025. Rather than recording nerve injury when a patient sounded hoarse, it examined the vocal cords by laryngoscopy after surgery.

Permanent injury was 0.2 percent. Transient hypoparathyroidism — the parathyroid glands failing temporarily, which means calcium supplements and blood tests — was 7.4 percent, and permanent hypoparathyroidism 0.4 percent.

The gap between 4.1 and 1 is unlikely to be because this centre is worse. It is a high-volume unit reporting a thousand consecutive cases, which is the opposite of a series chosen to look good. The likelier explanation is that most published nerve-injury rates count the injuries that announced themselves, and this one counted the injuries that were there.

Who these operations are actually done on#

• Mean age 40.9 years.
• 87.2 percent women.
• Mean tumour size 1.1 cm.
• 83.0 percent had less than a total thyroidectomy.
• Recurrence was 0.8 percent over a mean follow-up of 22.7 months, which the authors themselves describe as short-term.

This is the profile of remote-access thyroid surgery: small cancers in young women, most of whom keep part of the gland. If that is not a description of your situation, the published outcomes of the approach were not measured on people like you.

That last point matters beyond the nerve. A meta-analysis of 64 studies found the greatest risk of perioperative hypoparathyroidism falls on patients having a total thyroidectomy with lateral neck dissection — which is close to the definition of the patient who is not offered the scarless approach. Some of what looks like the approach performing better is the operation being smaller.

A separate multicentre cohort of 2,144 patients compared the robotic and endoscopic transoral routes, which is the other way to avoid a neck scar. It is a comparison within remote-access surgery rather than against the conventional operation, and it does not settle whether avoiding the neck costs anything.

What this does not say#

1. It does not say remote-access surgery is dangerous. Permanent nerve injury was 0.2 percent in the Korean series, which is low by any standard, and the cosmetic result is real.
2. The 4.1 percent figure is one institution's. It is not proof that every transaxillary programme has that rate, and the 1 percent pooled figure is not proof that any of them has that one either.
3. No randomised trial compares remote-access with conventional thyroidectomy on the outcomes that matter, and given how patients are selected for each, one may never be done.
4. The Korean series reports a mean follow-up of 22.7 months. Recurrence in thyroid cancer is measured in decades, and the authors say so.
5. Hypoparathyroidism and nerve injury are not the only costs of thyroid surgery. Voice can change even when the nerves are intact, and much of the gland's function is not restored by taking a tablet.
6. None of this addresses whether the operation should happen at all, which for a small papillary cancer found on screening is the prior question.

The defensible summary is that the scar can be avoided, that Korea does this better and more often than anywhere else, and that the safety comparison making it look like the obviously safer choice is an artefact of who gets offered it and how injury was counted. Ask a surgeon what their own laryngoscopy-confirmed rate is, and whether you are the kind of patient their published results were measured on.