Transoral Endoscopic Thyroidectomy via Vestibular Approach: A Surgeon’s Guide to the Scarless Revolution

Let’s be honest — for decades, thyroid surgery meant a scar. A visible, sometimes keloid-prone, always-asking-for-explanation scar right on the front of the neck. Patients hated it. Surgeons accepted it. But then came a shift — a literal one, through the mouth. Transoral endoscopic thyroidectomy via vestibular approach (TOETVA) isn’t just another technique. It’s a paradigm shift. It’s like going from a front-door invasion to a secret tunnel — same destination, radically different entrance.

So, what exactly is this approach? And why are more endocrine surgeons — from Seoul to São Paulo — whispering about it like it’s the best-kept secret in the OR? Let’s break it down. No fluff. Just the good stuff.

What Is TOETVA? (And Why the Mouth?)

TOETVA stands for transoral endoscopic thyroidectomy via vestibular approach. In plain English: surgeons access the thyroid gland through three small incisions made inside the lower lip — the oral vestibule. That’s the space between your lips and gums. No cuts on the neck. None on the chest. Just three tiny portals hidden inside the mouth.

Here’s the deal: the oral vestibule offers a direct midline path to the thyroid. It’s closer than you’d think. The surgeon creates a working space using CO₂ insufflation, then inserts a camera and instruments. They dissect down through the platysma, past the strap muscles, and — bam — they’re at the thyroid. It’s minimally invasive, but it’s not for the faint of heart. Or the faint of hand.

Honestly, the first time I saw a TOETVA video, I thought, “Wait — they’re operating through the mouth? On the thyroid?” But after watching a few cases, it clicks. The anatomy is surprisingly forgiving. The learning curve? That’s another story.

Patient Selection: Who’s a Good Candidate?

Not everyone qualifies for TOETVA. And that’s okay. In fact, it’s better to be picky. Here’s what the current literature — and experienced surgeons — suggest:

• Nodule size: Ideally less than 6 cm. Bigger nodules? Tougher to extract through the mouth. You might need to morcellate or extend incisions.
• Thyroid volume: Total gland volume under 45 mL is a sweet spot. Larger glands crowd the working space.
• Benign or malignant? TOETVA works for benign nodules, follicular neoplasms, and even papillary thyroid microcarcinoma. But for large, aggressive cancers with extensive lymph node metastasis? Most surgeons say no.
• Body habitus: Patients with a short, thick neck or a history of prior neck surgery? Probably not ideal. The subplatysmal plane needs to be pristine.
• Patient preference: This matters a lot. Some people are fine with a scar. Others — especially young women, models, or anyone with keloid tendencies — will beg for TOETVA.

One more thing: patients need good oral hygiene. You’re breaching the mucosal barrier. Infection risk, though low, is real. A pre-op chlorhexidine mouthwash rinse? Non-negotiable.

The “Invisible Scar” Promise

This is the big selling point. No visible scar. Zero. Zilch. Patients wake up with a slightly swollen lip — like they got into a minor scuffle — but no neck incision. For many, that’s life-changing. And honestly? It’s not just cosmetic. It’s psychological. People stop worrying about turtlenecks, scar creams, or that awkward “what happened to your neck?” conversation at parties.

The Technique: Step-by-Step (The Nuts and Bolts)

Alright, let’s get into the weeds — but not too deep. Here’s a simplified walkthrough of a standard TOETVA. Keep in mind, variations exist. Every surgeon has their tweaks.

Step 1: Positioning and anesthesia. Patient is supine, neck slightly extended. General anesthesia with oral endotracheal intubation — but the tube is taped to the side. Some surgeons use a nasal tube to keep the oral cavity completely free. Either way, the mouth is prepped with povidone-iodine or chlorhexidine.

Step 2: Incisions. Three incisions, each about 5–10 mm. One midline, just above the frenulum. Two lateral, near the canine teeth. The midline incision is for the camera. The laterals? For instruments — dissectors, hook cautery, and the like.

Step 3: Creating the working space. A Veress needle or blunt trocar is inserted. CO₂ is insufflated at low pressure — usually 6–8 mmHg. Then comes the blunt dissection down to the platysma. You’re essentially tunneling from the chin to the clavicles. It’s weirdly satisfying to watch.

Step 4: Thyroidectomy. Standard steps: identify the midline raphe, retract the strap muscles, locate the recurrent laryngeal nerve, preserve the parathyroids. The view? Inverted from open surgery — the superior pole is at the bottom of the screen. It takes getting used to. But the magnification is excellent. Some say better than open.

Step 5: Extraction and closure. The specimen is placed in a retrieval bag and pulled out through the midline incision. Sometimes it needs to be morcellated — but careful, you don’t want to rupture a malignant nodule. Then the incisions are closed with absorbable sutures. Patients go home the same day or next morning.

A Quick Comparison: TOETVA vs. Other Scarless Approaches

Approach	Incisions	Scar Location	Learning Curve
TOETVA	Oral vestibule (3)	None visible	Moderate to steep
Bilateral axillo-breast (BABA)	Axillae + areolae	Small, hidden	Steep
Retroauricular (facelift)	Behind ear + hairline	Hidden in hair	Moderate
Transaxillary	Axilla	Visible if sleeveless	Moderate

TOETVA stands out because it’s truly scarless — no external marks at all. Plus, it gives bilateral access, unlike some unilateral approaches. But sure, it’s not perfect. The oral flora thing? It’s a consideration. And the mental shift for surgeons? That’s a bigger hurdle.

Complications and How to Avoid Them

No surgery is risk-free. TOETVA has its own quirks. Let’s talk about the big ones.

• Recurrent laryngeal nerve injury: The risk is similar to open surgery — around 1–2% in experienced hands. But the angle of dissection is different. You’re looking at the nerve from a cephalad perspective. It’s like watching a movie from the balcony instead of the front row. You see the same thing, but the perspective shifts.
• Parathyroid injury: Same story. Careful capsular dissection is key. Some surgeons use indocyanine green (ICG) angiography to check perfusion. Fancy, but not mandatory.
• Mental nerve injury: This is unique to TOETVA. The mental nerve exits near the premolars. If you place lateral incisions too far back, you can cause chin numbness. Keep incisions anterior to the mental foramen. Pro tip: palpate it before cutting.
• Infection: Oral bacteria are opportunistic. Prophylactic antibiotics are standard. Also, meticulous closure — watertight — to prevent saliva tracking down.
• CO₂-related issues: Subcutaneous emphysema, hypercarbia. Keep insufflation pressure low. Monitor end-tidal CO₂ like a hawk.

And here’s a weird one: some patients complain of a “tight” feeling under the chin for a few weeks. It’s from the dissection. It resolves. But warn them upfront, or they’ll think something’s wrong.

The Learning Curve: It’s Steep, But Worth It

Let’s not sugarcoat it — TOETVA has a learning curve. Most studies suggest at least 20–30 cases to achieve proficiency. Some say 50. The first few cases will feel clumsy. The instruments are long. The camera angle is weird. You’ll bump into your own hands. You’ll lose orientation. That’s normal.

But here’s the thing: once it clicks, it really clicks. Surgeons who do 50+ cases report operative times comparable to open surgery — around 60–90 minutes for a lobectomy. And the patient satisfaction? Through the roof. Honestly, it’s one of those techniques that makes you wonder why we didn’t do it sooner.

Training matters. Cadaver courses, proctored cases, simulation — all of it helps. And if you’re a resident or fellow reading this: start watching videos now. The visual memory helps.

Current Trends and Future Directions

TOETVA is growing. Fast. In Asia, it’s already mainstream. In the US and Europe, it’s gaining traction — especially in academic centers. The American Thyroid Association now includes it in guidelines as a viable option for selected patients.

What’s next? Robotic TOETVA — using the da Vinci system through the mouth. It’s more expensive, but the wristed instruments and 3D vision are tempting. Also, there’s work on transoral endoscopic parathyroidectomy for hyperparathyroidism. Same principle, different gland.

And then there’s the pain point: cost. TOETVA requires specialized instruments — longer graspers, hook cautery, and sometimes a harmonic scalpel. But as adoption increases, costs will drop. It’s the classic curve.

Final Thoughts: More Than a Scarless Surgery

Transoral endoscopic thyroidectomy via vestibular approach isn’t just about avoiding a scar. It’s about rethinking access. It’s about listening to patients who said, “I’d rather not have a visible reminder of my disease.” It’s about pushing surgical boundaries — carefully, methodically, but with conviction.

Sure, it’s not for everyone. Not every patient, not every surgeon. But