Transoral Endoscopic Thyroidectomy Vestibular Approach: A Series of the First 60 Human Cases.

The Transoral Neck Surgery (TONS) Study Group was established at the 1st International Thyroid NOTES Conference in February 2016 with the intention of standardizing and refining thyroid NOTES techniques, including both transoral endoscopic and robotic thyroidectomy approaches. Herein, the authors report the modification of indications, preparation, and step-by-step explanations for operative techniques, as well as results and postoperative care for transoral endoscopic thyroidectomy vestibular approach (TOETVA). Between February 2015 and December 2015, a total of 200 patients comprising 8 males (4%) and 192 females (96%) underwent TOETVA using 3 laparoscopic ports inserted at the oral vestibule. Of these patients, 111 presented with single thyroid nodules (55.5%), while 66 patients had multinodular goiters (33%), 12 had Graves' disease (6%) and 11 had papillary microcarcinoma (5.5%). The CO2 insufflation pressure was maintained at 6mmHg. Each surgery was performed using laparoscopic instruments and ultrasonic devices. TOETVA was performed on 200 consecutive patients. No conversion to conventional open surgery was necessary. Average tumor size was 4.1±1.78cm (1-10cm). Median operative time was 97±40.5min (45-300min). Median blood loss was 30±46.25mL (6-300mL). Mean visual analog scale measurements were 2.41±2.04 (2-7), 1.17±1.4 (0-5), and 0.47±0.83 (0-3) on the first, second, and third days, respectively. Temporary hoarseness and hypoparathyroidism occurred in 8 patients (4%) and 35 patients (17.5%), respectively. No permanent hoarseness or hypoparathyroidism occurred. Mental nerve injury occurred in 3 patients (1.5%). One patient (0.5%) developed a post-operative hematoma that required open surgery. No infection was identified. TOETVA was shown to be safe and feasible with a reasonable surgical duration and minimal pain scores. This approach shows promise for those patients who are motivated to avoid a neck scar.

The transoral endoscopic thyroidectomy vestibular approach (TOETVA) is increasingly being adopted worldwide because of its many advantages. However, there are few reports on the effectiveness and safety of TOETVA in children. In this study, we report the results of the application of TOETVA on 27 pediatric patients in Vietnam. To the best of our knowledge, this is also the largest sample size of the TOETVA technique performed by a single surgeon on pediatric patients worldwide. Patients and methods: From June 2020 to February 2022, we performed TOETVA on 27 pediatric patients (≤ 18 years old). The outcomes of the procedure were retrospectively reviewed. Our study was conducted on 27 pediatric patients, of whom 24 were female (88.9%). The mean age was 16.3 ± 2 (range 10-18). Fifteen patients had benign thyroid nodules with a mean nodule size of 31.6 ± 7.1 (range 20-50mm), and 12 patients had papillary thyroid carcinoma with a mean nodule size of 10.2 ± 5.6 (range 4-19mm). All 27 patients underwent successful TOETVA without any conversion to open surgery. The 15 patients with benign thyroid nodules had lobectomies with a mean operative time of 83.3 ± 10.5 (range 60-105 minutes). Among the 12 patients diagnosed with thyroid cancer, ten had a lobectomy, isthmusectomy, and central neck dissection, with a mean operative time of 89.8 ± 5.7 (range 80-100 minutes). The other two underwent total thyroidectomy with central lymph node dissection with a mean operative time of 132.5 minutes. The mean hospital stay was 4.7 ± 0.9 (range 3-7 days). No patient had permanent complications, such as hypocalcemia, recurrent laryngeal nerve injury, or mental nerve injury. The rates of temporary recurrent laryngeal nerve injury and mental nerve injury were 3.7% and 11.1% respectively. TOETVA may be a feasible and safe surgical method for children with thyroid disease. However, we recommend that only high-volume thyroid surgeons with experience in TOETVA should perform TOETVA on the pediatric population.

Natural orifice transluminal endoscopic surgery thyroidectomy is a novel approach to avoid surgical scars. To compare the safety and outcomes of the transoral endoscopic thyroidectomy vestibular approach (TOETVA) with those of open thyroidectomy (OT). This study retrospectively reviewed all TOETVA and OT operations performed from April 1, 2014, through August 31, 2016, at Police General Hospital, Bangkok, Thailand. All patients who underwent TOETVA and patients who underwent OT were included. Exclusion criteria were (1) previous neck surgery, (2) substernal goiter, (3) lymph node or distance metastasis, and (4) suspicious invasion to the adjacent organs. Propensity score matching was conducted to reduce selective bias. Operative time, blood loss, and complications related to thyroid surgery. Of the 425 patients who underwent transoral endoscopic thyroidectomy (mean age, 35.3 [12.1] years; age range, 16-81 years; 389 [92.2%] female), 422 successfully were treated with the TOETVA; 3 patients were converted to a conventional operation because of bleeding. Twenty-five patients (5.9%) had transient recurrent laryngeal nerve palsy, and 46 (10.9%) had transient hypoparathyroidism. None had permanent recurrent laryngeal nerve palsy or permanent hypoparathyroidism. Three patients (0.7%) had transient mental nerve injury; all cases resolved by 4 months. One patient developed postoperative hematoma treated by OT. Twenty patients (4.7%) had seroma treated by simple aspiration. Operative time was longer for the TOETVA compared with the OT group (100.8 [39.7] vs 79.4 [32.1] minutes, P = 1.61 × 10-10). The mean (SD) visual analog scale score for pain was lower in the TOETVA group (1.1 [1.2] vs 2.8 [1.2], P = 2.52 × 10-38). Estimated mean (SD) blood loss (36.9 [32.4] vs 37.6 [23.1] mL, P = .43) and rate of complications (45 of 216 [20.8%] vs 38 of 216 [17.6%], P = .41) were not significantly different in the TOETVA vs OT group. The TOETVA was performed as safely as OT, requires only conventional laparoscopic instruments, and avoids incisional scars; thus, the approach may be an option for select patients.

Transoral endoscopic thyroidectomy vestibular approach (TOETVA) is a feasible novel surgical procedure that does not need visible incisions. We describe our initial experience with TOETVA. We recruited 15 patients who were willing to undergo TOETVA. Inclusion criteria were (a) patients who had a neck ultrasound (US) with a estimated thyroid diameter not larger than 10cm; (b) US estimated gland volume ≤45mL; (c) nodule size ≤50mm; (d) a benign tumor, such as a thyroid cyst, single-nodular goiter, or multinodular goiter; (e) follicular neoplasm; (f) papillary microcarcinoma without evidence of metastasis. The procedure is carried out through a three-port technique placed at the oral vestibule, one 10-mm port for 30° endoscope and two additional 5-mm ports for dissecting and coagulating instruments. CO2 insufflation pressure is set at 6mmHg. An anterior cervical subplatysmal space is created from the oral vestibule down to the sternal notch, laterally to the sternocleidomastoid muscle. Thyroidectomy is done fully endoscopically using conventional endoscopic instruments and intraoperative neuromonitoring. There were 34% total thyroidectomies and 66% hemithyroidectomies. All TOETVA procedures were performed successfully with no conversions. The mean operative time was 87.6 (59-118) min for lobectomy and 107.6 (99-135) min for bilateral procedure. We observed one case of transient postoperative hypocalcemia. There was no recurrent laryngeal nerve palsy. The cosmetic result was excellent in all patients. This is the first case series of TOETVA in Italy. TOETVA may provide a method for ideal cosmetic results. The results are encouraging, and we are optimistic about the future expansion of its applicability.

Transoral endoscopic thyroidectomy vestibular approach (TOETVA) provides excellent cosmetic results from its potential for scar-free operation. The procedure has been applied successfully for Graves' disease by the authors of this work and compared with the standard open cervical approach to evaluate its safety and outcomes. From January 2014 to November 2016, a total of 97 patients with Graves' disease were reviewed retrospectively. Open thyroidectomy (OT) and TOETVA were performed in 49 patients and 46 patients, respectively. For TOETVA, a three-port technique through the oral vestibule was utilized. The thyroidectomy was done endoscopically using conventional laparoscopic instruments and an ultrasonic device. Patient demographics and surgical variables, including operative time, blood loss, and complications, were investigated and compared. TOETVA was performed successfully in all 45 patients, although conversion to open surgery was deemed necessary in one patient. All patient characteristics for both groups were similar. Operative time was shorter for the OT group compared to the TOETVA group, which totaled 101.97±24.618 and 134.11±31.48 minutes, respectively (P<<0.5). Blood loss was comparable for both groups. The visual analog scale (VAS) pain score for the TOETVA group was significantly lower than for the OT group on day 1 (2.08±1.53 vs. 4.57±1.35), day 2 (0.84±1.12 vs. 2.57±1.08) and day 3 (0.33±0.71 vs. 1.08±1.01) (P<<0.05). Transient recurrent laryngeal nerve (RLN) palsy was found in four and two cases of TOETVA and OT group, respectively. Transient hypocalcemia was found in ten and seven cases of TOETVA and OT group, respectively. No other complications were observed. TOETVA is a feasible and safe treatment for Graves' disease in comparison to the standard open cervical approach. It is considered a viable alternative for patients who have been indicated for surgery with excellent cosmetic results.

Objective: To present the perioperative data of patients with solitary or multinodular goiter and/ or papillary thyroid carcinoma who underwent Transoral Endoscopic Thyroidectomy Vestibular Approach (TOETVA) in a single tertiary medical center. Methods: Design: Case series Setting: Tertiary Government Hospital Participants: Records of 10 patients who underwent TOETVA from June 2018 to July 2019 (9 thyroid lobectomies, 1 total thyroidectomy) were reviewed. Outcomes and measures included conversion to open surgery, operative time, intraoperative blood loss, size of the thyroid gland, postoperative hospital stay, visual analogue pain scores (VAS), and postoperative complications. Results: None of the 10 patients were converted to an open procedure. The average preoperative thyroid size was 4.73 cm in widest diameter using thyroid ultrasound (±1.88 cm, range 3.6 to 6.5 cm). Mean operative time for thyroid lobectomy and total thyroidectomy was 4 hours and 29 minutes and 4 hours and 15 minutes, respectively. Mean intraoperative blood loss was 140 ml (±47.96 ml, range 80 to 200 ml) for thyroid lobectomy and 100 ml for total thyroidectomy. The average intraoperative size of the thyroid gland measured in widest diameter (larger lobe for total thyroidectomy) was 4.48 cm (±0.919 cm, range 3 to 5.5 cm). Median postoperative hospital stay was 2 days (±1.55 days, range 2 to 12 days). Mean VAS pain scores for postoperative days 1, 2, 3, and 7 were 5, 3, 2, and 0, respectively. Transient recurrent laryngeal nerve injury (of 3 months duration) occurred in 1 patient. Two cases had surgical site infection, 2 had wound dehiscence, 1 had seroma and 1 had skin burn as a complication. None had hypocalcemia or mental nerve injury in the series. Conclusions: TOETVA was replicated in the local setting and a presentation of the perioperative data of all the patients who underwent this novel technique, the indications, as well as surgical and patient outcomes, were described. Keywords: TOETVA; thyroidectomy; transoral; endoscopic; minimally invasive

Background: Conventional open thyroidectomy is associated with a visible scar in the neck which may cause significant psychological distress to some patients, especially young women. Transoral endoscopic thyroidectomy vestibular approach (TOETVA) is an adaptation of the natural orifice transluminal endoscopic surgery (NOTES) technique to thyroid surgery and allows for a scarless surgery with minimal dissection.Methods: This study retrospectively reviewed all TOETVA surgeries performed at the department of endocrine surgery between August 2016 and July 2018. Protocol for selecting patients for this novel approach included patients with clinically benign thyroid nodules less than 6cm in diameter, with a strong preference for scarless surgery. The surgery was performed endoscopically through the inferior oral vestibule using conventional laparoscopic instruments.Results: A total of 11 patients were included. The mean size of the thyroid nodules was 3.72 cm. Hemithyroidectomy was performed in 7 patients and total thyroidectomy in 4. The median operative time was 150 minutes for hemithyroidectomy and 225 minutes for total thyroidectomy. One patient required conversion to open thyroidectomy due to excessive bleeding. Adverse effects included transient mental nerve palsy in 2 patients, temporary RLN palsy in 1 patient and temporary hpoparathyroidism in 1 patient. All 10 patients who underwent successful TOETVA reported satisfaction with the cosmetic outcome.Conclusions: TOETVA can be used to offer scar free thyroidectomy in appropriately selected patients. Attention to the anatomy of the mental nerve is essential to prevent nerve injury. Additionally the relatively longer operative time could lessen with increasing operator experience.

BackgroundThis study aimed to evaluate the feasibility and safety of the trans-oral endoscopic thyroidectomy vestibular approach (TOETVA) with neuroprotection techniques for the surgical management of papillary thyroid carcinoma (PTC).MethodsPatients with PTC who underwent TOETVA between December 2016 and July 2020 were included in this study, and their relevant clinical characteristics, operational details, and surgical outcomes were reviewed and extracted from their medical records for further analysis.ResultsA total of 75 patients successfully underwent TOETVA with zero conversions. Unilateral lobectomy with isthmectomy and total thyroidectomy were completed for 58 and 17 patients, respectively, all using our unique neuroprotective procedure and ipsilateral central neck dissection (CND). The mean number of retrieved lymph nodes versus positive lymph nodes was 6.8 ± 3.7 vs. 1.5 ± 2.3. Postoperative complications included three cases of transient superior laryngeal nerve (SLN) palsy (4.0%), five cases of transient recurrent laryngeal nerve (RLN) palsy (6.7%), 14 cases of transient hypoparathyroidism (18.7%), two cases of numb chin (2.7%) and two cases of flap perforation (2.7%). The follow-up period for patients with PTC lasted for 15.6 ± 10.9 months, during which no other complications or tumor recurrence were observed.ConclusionTOETVA can be safely performed for patients with PTC with satisfactory results during the short-term follow-up period. Our neuroprotection techniques can be integrated into TOETVA, which is worth recommending for PTC patients who desire better cosmetic surgical outcomes.

Transoral endoscopic thyroidectomy vestibular approach (TOETVA) and total endoscopic thyroidectomy via areola approach (ETA) are commonly used endoscopic thyroidectomy approaches. This study compares the effectiveness of these approaches with conventional open thyroidectomy (COT) in terms of safety, associated trauma, and feasibility of central neck dissection in the treatment of papillary thyroid carcinoma (PTC). This retrospective study included patients who underwent TOETVA (n = 100), ETA (n = 119), and COT (n = 289). All patients had a pathological diagnosis of PTC and underwent unilateral lobectomy and central neck dissection. We analyzed operative time, postoperative drainage volume, postoperative C-reactive protein (CRP), preoperative and postoperative white blood cell (WBC) count and parathyroid hormone (PTH) levels, parathyroid damage, hoarseness, total number of central lymph nodes, and number of metastatic central lymph nodes. The clinical characteristics across the three groups were similar except for patient sex and age. There was a higher proportion of young women in the TOETVA and ETA groups than in the COT group. There were significant differences between the three groups regarding operative time (P = 0.000), postoperative drainage volume (P = 0.000), postoperative CRP (P = 0.000), ∆WBC (P = 0.000), and length of postoperative hospital stay (P = 0.021); in the TOETVA and ETA groups, operative time (P = 0.445), postoperative drainage volume (P = 0.677), and length of postoperative hospital stay (P = 0.145) were not significantly different. The percentage of cases with parathyroid gland damage (P = 0.459) and hoarseness (P > 0.05) was similar in all groups. All three procedures were efficient in performing a central lymph node dissection. Although considered more traumatic, TOETVA and ETA are both safe treatment options for PTC. They can both achieve similar therapeutic effects of central neck dissection in the treatment of PTC when compared with open surgery.

BackgroundUse of the novel transoral endoscopic thyroidectomy vestibular approach (TOETVA) is increasing worldwide. Although several studies have compared safety and efficacy of TOETVA and other approaches, most focused on comparisons in the context of unilateral thyroidectomy. Therefore, the present study aimed to compare the safety and surgical completeness of TOETVA with conventional open thyroidectomy (COT) in patients with papillary thyroid carcinoma (PTC) undergoing total thyroidectomy and central neck dissection.MethodsThe medical records of patients who underwent TOETVA or COT by a single surgeon between June 2017 and October 2021 were retrospectively reviewed. All patients were diagnosed with PTC and underwent total thyroidectomy with central neck dissection. Propensity score-matching (PSM) was used to reduce potential selection bias and to adjust for differences in baseline clinicopathological characteristics.ResultsAfter PSM, 84 (TOETVA: 28; COT: 56) patients remained in the study population. There were no significant differences in sex, mean age, combined thyroiditis, tumor size, capsule invasion, tumor multifocality in the same lobe, or tumor location between the groups. Operative time was longer (190.54 ± 28.26 vs. 123.93 ± 29.78 min, P<0.001), while postoperative drainage volume (161.07 ± 225.30 vs. 71.16 ± 28.56 ml, P=0.045) was greater, in the TOETVA group than in the COT group. The groups exhibited no significant differences in the mean number of central lymph nodes retrieved (9.39 ± 4.01 vs. 10.71 ± 5.17, P=0.202), mean number of metastatic central lymph nodes (1.36 ± 1.93 vs. 1.77 ± 2.31, P=0.421), postoperative mean thyroglobulin levels (0.08 ± 0.24 vs. 0.10 ± 0.27, P=0.686), rate of transient hypoparathyroidism (TOETVA: 67.9% vs. COT: 66.1%, P=0.870), rate of transient vocal cord palsy (TOETVA: 0% vs. COT: 1.8%, P=1.000), or other complications (TOETVA: 3.6% vs. COT: 0%, P=0.333).ConclusionsTOETVA is a safe approach in select patients with PTC and exhibits similar efficacy to COT in terms of surgical completeness.

IntroductionThis meta-analysis was designed to compare the outcomes of transoral endoscopic thyroidectomy vestibular approach (TOETVA) versus endoscopic thyroidectomy via the areola approach (ETAA) for thyroid carcinoma.Materials and methodsFive databases (PubMed, Embase, Web of Science, Cochrane Library, and Scopus) were systematically searched for studies comparing endoscopic thyroidectomy via TOETVA versus ETAA in patients with thyroid carcinoma. The search was conducted from the databases’ establishment to May 31, 2025. Operative time, intraoperative blood loss, number of central lymph node dissections, postoperative drainage volume, length of hospital stay, postoperative infection, hypoparathyroidism, perioperative recurrent laryngeal nerve injury, complication, hypocalcemia, subcutaneous ecchymosis, cough, trachyphonia, postoperative parathyroid hormone (PTH), postoperative blood calcium, pain score of Visual Analogue Scale (VAS), swallowing discomfort, hematoma, central lymph node dissection time, and satisfaction with cosmetic effects were subjected to meta-analyses.ResultsA total of 15 studies were included in the meta-analysis. The meta-analysis included a group of 1,961 patients diagnosed with thyroid carcinoma. Within this cohort, 777 patients underwent endoscopic thyroidectomy via TOETVA, while 1,184 patients underwent endoscopic thyroidectomy via ETAA. Compared with ETAA, TOETVA yielded lower intraoperative bleeding volume [weighted mean difference (WMD = −1 mL, 95% confidence interval (CI): −3 to 0, p = 0.03], higher number of central lymph node dissections (WMD = 1.4, 95% CI: 0.3 to 2.3, p = 0.02), and higher satisfaction with cosmetic effects of the patients (WMD = 0.93, 95% CI: 0.42 to 1.43, p = 0.0004), but longer operative time (WMD = 17 min, 95% CI: 8 to 26, p = 0.0002). There was no statistically significant difference between the two groups regarding postoperative drainage volume (WMD = −6 mL, 95% CI: −17 to 5, p = 0.31), postoperative infection [odds ratio (OR) = 1.43, 95% CI: 0.47 to 4.43, p = 0.53], perioperative recurrent laryngeal nerve injury (OR = 0.62, 95% CI: 0.30 to 1.28, p = 0.20), hypocalcemia (OR = 0.88, 95% CI: 0.40 to 1.91, p = 0.74), swallowing discomfort (OR = 0.83, 95% CI: 0.24 to 2.95, p = 0.78), hypoparathyroidism (OR = 0.47, 95% CI: 0.18 to 1.18, p = 0.11), and hospitalization time (WMD = 0.03 days, 95% CI: −0.13 to 0.19, p = 0.71).ConclusionsThe findings indicated that both TOETVA and ETAA demonstrated safe and reliable clinical efficacy. TOETVA offers additional benefits concerning satisfaction with cosmetic effects and central lymph node dissection. TOETVA is an optimal option for patients seeking scarless surgical procedures.Systematic review registrationhttps://www.crd.york.ac.uk/prospero/, identifier CRD420251021663.

Safety and surgical outcomes of transoral endoscopic thyroidectomy vestibular approach for papillary thyroid cancer: A two-centre study

Objective: To investigate the efficacy of transoral endoscopic thyroidectomy vestibular approach (TOETVA) assisted with submental mini-incision in early thyroid papillary carcinoma. Methods: A total of 63 patients with early papillary thyroid carcinoma (cT1N0M0) were included who underwent TOETVA from December 2019 to May 2021 in Department of Thyroid Surgery of the Affiliated Hospital of Jining Medical University. There were 4 males and 59 females, aged from 17 to 46 years old. Of those 36 patients received traditional TOETVA as control and 27 patients accepted modified TOETVA assisted with submental mini-incision. The clinical outcomes of patients in two groups were compared. Chi-square test and t test were used in statistical analyses. Results: Compared to control group, modified TOETVA group had the less mean operation time [(146.63±38.62) minutes vs. (167.78±36.71) minutes, t=-2.21, P=0.031], the shorter time required for returning to normal diet after operation [(2.11±0.89) days vs. (2.72±1.16) days, t=-2.28, P=0.026], and the lower probability of mandibular numbness (0 vs. 16.67%, χ2=4.97, P=0.026). There was no significant difference between two groups in intraoperative blood loss, postoperative drainage volume, number of central lymph nodes dissection, and postoperative complications such as gas embolism, postoperative bleeding, postoperative infection, skin burns, subcutaneous effusion and so on(all P>0.05). After 6 months of operation, the thyroid ultrasound of the patients in two groups showed no recurrence, and the patients were satisfied with their surgical incision appearances. Conclusion: Both the modified and traditional TOETVA show similar efficacies for treatments of early thyroid papillary carcinoma, but the modified TOETVA can reduce the operation time and improve the quality of life.

The manuscript describes the transoral endoscopic thyroidectomy vestibular approach (TOETVA) for thyroid lobectomy. The patient is placed in the supine position with extension and fixation of the neck. One 20 mm transverse incision and two 5 mm incisions are made through the mucosa of the oral vestibule for camera and instrument placement after disinfection of the skin and oral cavity. The workspace is established and maintained by the skin suspension device, which is made of unabsorbable string (3-0) and rubber bands, and the CO2 insufflation pressure. Lobectomy using a medial-to-lateral technique and prophylactic ipsilateral central neck dissection is performed simultaneously on patients with papillary thyroid cancer (PTC). The specimen is extracted through the 20 mm incision. The parathyroid gland is immediately searched for in the specimen and auto-transplanted to the left brachioradialis. A drainage tube is inserted through the retractor hole into the bed of the thyroid gland, and absorbable sutures are used to close the mucosal incisions in the oral vestibule and the linea alba cervicalis. Prophylactics administered intravenously are recommended for the first 24 h after surgery, and oral antibiotics are used for 7 days postoperatively.

Transoral Endoscopic Thyroidectomy Vestibular Approach (TOETVA) is a natural orifice transluminal endoscopic surgery that offers a truly scarless approach to thyroidectomy. Introduced in 2008, there is a growing body of literature establishing it as a safe endoscopic approach for thyroid procedures. While it is not yet widely practiced, it is quickly growing in popularity. As more surgeons begin to add this technique to their repertoire the question of the learning curve has to be examined. Case series from the initial TOETVA operations of four surgeons at three different hospitals were examined. Binomial and ordinal logistic regression were used to characterize the changes in complication rate and severity as they related to case number in the series. Statistics were performed in Minitab and SAS. Each surgeon performed between 23 and 40 TOETVA operations for a total of 130 cases. Binary logistic regression shows a negative relationship between case number and complication rate (P < 0.001, Odds Ratio: 0.91). Ordinal logistic regression shows a negative relationship between case number and complication severity (P < 0.001, Odds Ratio: 1.07). The maximum slope of improvement of complication rate occurred at case number 12. The most significant decrease in complications for TOETVA occurs at case 12. As case number progresses, there is a significant decrease in both the risk of a complication occurring and of the severity of that complication. These results support the previously published data on TOETVA learning curve based on operative time.