Endoscopic minimally invasive thyroidectomy (eMIT): a prospective proof-of-concept study in humans

Antibiotic Use Can be De-escalated During Transoral Endoscopic Thyroidectomy: A Bacterial Culture-Based Study

Objective: To explore the possibility of reducing the use of antibiotics after transoral endoscopic thyroidectomy vestibular approach (TOETVA). Method: A retrospective study was conducted on patients with thyroid tumors who were diagnosed and underwent surgical treatment at our hospital from 2022 to 2024. Patients diagnosed with T1-stage differentiated thyroid cancer or a benign retrosternal goiter <4 cm with cosmetic needs were included in the current study. Drainage fluid was cultured on the first postoperative day. The differences in infection rates, bacterial culture results, and antibiotic use between patients with clean incisions and those with clean-contaminated incisions were compared. Results: There were no signs of infection in the postoperative drainage fluid or delayed healing due to surgical cavity infection. There was no significant difference in the incidence of postoperative infection or the results of bacterial culture between clean and clean-contaminated incisions or between the groups with and without antibiotic use for clean-contaminated incisions. The proportion of pathogenic bacteria in clean-contaminated incisions was significantly greater than that in clean incisions, while bacteria cultured in clean incisions were mostly common colonizing bacteria. Conclusion: Pathogenic bacteria may indeed exist in the operative cavity of the TOETVA regardless of whether antibiotics are used during the perioperative period. With adequate drainage, the absence of the routine administration of antibiotics or only preventive antibiotics during the perioperative period does not increase the infection rate.

Application of fibrin sealant in drain-free transoral endoscopic thyroidectomy vestibular approach

Objective

The transoral endoscopic thyroidectomy vestibular approach (TOETVA) is a minimally invasive technique. This study aimed to compare the safety of TOETVA with fibrin sealant (Tisseel) and TOETVA with drainage.

Materials and Methods

Patients who underwent TOETVA between January 2018 and December 2021 were divided into drainage (n = 20) and Tisseel (n = 30) groups.

Results

The primary outcome was the incidence of complications. The secondary outcomes were operative time and postoperative pain. There were no significant differences in patient demographics, tumor size, intraoperative blood loss, and hospitalization days between the two groups. No patient required conversion to open thyroidectomy. The incidence of complications and postoperative pain was similar in the two groups. The operative time for TOETVA with Tisseel was significantly shorter than for TOETVA with drainage (P = 0.038).

Conclusion

TOETVA with Tisseel is a safe alternative to TOETVA with drainage, having a short operative time.

A Prospective Comparative Analysis to Study the Impact on Voice Changes Following Endoscopic Thyroidectomy

BACKGROUND

Endoscopic approach has come up as a safe and feasible procedure for thyroidectomy with better cosmetic outcomes. However, concerns over its safety in terms of nerve injury and postoperative voice changes remain. This prospective study evaluated the role of vocal cord function assessment using laryngeal examination and voice analysis in patients who underwent endoscopic hemithyroidectomy either by the trans-oral endoscopic thyroidectomy vestibular approach (TOETVA) or the bilateral axillobreast approach (BABA).

METHODS

Thirty-nine consecutive patients were randomly allocated to either of the 2 groups of endoscopic hemithyroidectomy; 19 in TOETVA and 20 in the BABA groups. Vocal cord function was assessed subjectively using the GRBAS scale and objectively by acoustic analysis of parameters such as jitter, shimmer, mean frequency (F 0 ), noise-to-harmonic ratio (NHR), and maximum phonatory time (MPT) at baseline, postoperative day 10, and 3 months after surgery.

RESULTS

There were no significant differences in mean GRBAS scores and values of mean frequency, jitter and shimmer between the 2 groups and on postoperative day 10 and at 3 months compared with baseline. The mean NHR and MPT showed no differences between the 2 procedures. However, there was a significant decrease in their values on day 10 postsurgery, compared with baseline. These values returned to their baseline at 3 months. The other operative parameters were comparable between the 2 groups, except for the shorter mean operative time in the TOETVA group.

CONCLUSIONS

Perioperative quantitative voice parameters were comparable with no statistically significant difference between the 2 techniques of endoscopic thyroidectomy.

A New Transoral Vestibulum Single Incision Endoscopic-Assisted Thyroidectomy with Gasless

OBJECTIVE

We developed a novel method for thyroidectomy using a single-incision oral vestibular approach. To assess its advantages and disadvantages, we compared the perioperative parameters of this approach with those of transoral three-incision thyroidectomy and trans-areolar thyroidectomy.

METHODS

In a study of 136 papillary thyroid carcinoma patients (2016-2018), precise thyroidectomy and neck dissection were conducted. Among them, 52 chose single-incision oral vestibular approach, 33 chose three-incision variant, and 51 underwent trans-areolar thyroidectomy. Perioperative aspects of the transoral single-incision group were compared with those of transoral three-incision group, and transthoracic group.

RESULTS

In the cohort, meticulous tumor level VI lymph node dissection was performed, achieving intended resection extent with one case requiring a switch from transoral to transthoracic approach. No nerve palsy occurred in the transoral group. Thyroidectomy duration varied significantly across groups. Transoral single-incision had a shorter duration than transoral three-incision and longer than transthoracic. Minor differences were observed in blood loss and drainage. Perioperative factors like hematoma, infection, hypocalcemia, et al., remained consistent. Notably, no tumor recurrence was observed in this study.

CONCLUSIONS

This new transoral video-assisted neck surgery (TOVANS) method for thyroidectomy without gas insufflation approach did not increase the surgical complexity compared with the transoral vestibular three-incision thyroidectomy and the trans-areolar thyroidectomy.

LEVEL OF EVIDENCE

3 Laryngoscope, 134:2976-2984, 2024.

Feasibility and complications after transoral endoscopic thyroidectomy via vestibular approach (TOETVA) - a single-center first experience case series

BACKGROUND

This paper reports on the first experience after implementation of a transoral endoscopic thyroidectomy via vestibular approach (TOETVA) as an alternative to (partial) thyroidectomy or isthmusectomy in a single center. Feasibility, implementation and specific complications are addressed.

METHODS

All patients who underwent a TOETVA procedure in our center between November 2019 and March 2023 were included. The surgical technique was performed as described by Anuwong et al. All procedures were performed by two dedicated head- and neck surgeons.

RESULTS

A total of 20 patients were included. All patients underwent TOETVA surgery as planned and no conversions were needed. Observed complications were post-operative wound infections (POWI) (2/20; 10%), clinically significant seroma (1/20, 5%) and unilateral hemiparesis of the larynx (3/20; 15%). Permanent mental nerve damage was seen in 3/20 patients (15%), and 4 other patients (20%) experienced transient neuropraxia.

CONCLUSIONS

TOETVA is a feasible alternative to (partial) thyroidectomy or isthmusectomy in selected patients. Special care should be taken when placing the trocars in the oral vestibulum to prevent mental nerve damage. Experience and training are essential for implementing the TOETVA procedure.

TRIAL REGISTRATION

This study was registered to ClinicalTrials.gov.

TRIAL REGISTRATION NUMBER

NCT05396703.

Comparison of endoscopic thyroidectomy via the oral vestibule approach and the areola approach for papillary thyroid carcinoma

BACKGROUND

The endoscopic thyroidectomy areola approach (ETAA) has been widely applied for papillary thyroid carcinoma (PTC), but leaves scars and is not truly minimally invasive. The oral vestibular approach (ETOVA) leaves no scars and is even more minimally invasive. However, there have been few comparative studies of ETAA and ETOVA for PTC. The purpose of our research was to compare two PTC treatment methods in terms of feasibility, safety, efficacy, and cosmetic results.

METHODS

A total of 129 patients with PTC underwent thyroidectomy combined with central lymph node dissection by the same surgeon. Among them, 79 patients underwent the ETOVA, and the others underwent the ETAA. We compared the two groups in terms of operative outcomes, postoperative complications, and cosmetic results.

RESULTS

No significant differences were found in the clinical characteristics between the ETOVA and ETAA groups. There were no significant differences in the number of removed lymph nodes (P = 0.279) or the number of positive lymph nodes (P = 0.569), but the ETOVA group had a higher number of removed lymph nodes. There was also no significant difference in blood loss volume(P = 0.180), postoperative drainage volume (P = 0.063), length of hospital stay (P = 0.182), transient RLN injury rate (P = 1.000), permanent RLN injury rate (P = 1.000), or recurrence rate (P = 1.000). The ETOVA was a longer operation than the ETAA was (P < 0.01). The ETOVA group had less pain (VAS 1: P < 0.01, VAS 3: P = 0.001), less neck discomfort (1 month after surgery: P = 0.009, 3 months after surgery: P = 0.033), and better cosmetic results (P = 0.001).

CONCLUSIONS

The ETOVA is not inferior to the ETAA in terms of safety and curability of PTC and is advantageous in terms of central lymph node dissection, minimal invasiveness, and cosmetic results.

TRIAL REGISTRATION

This study was approved by the Ethics Committee of Zhongshan Hospital of Xiamen University (2017 V1.0). No funding was received.

Comparison of surgical outcomes of transoral robotic and endoscopic thyroidectomy: A systematic review and network meta-analysis

This study aimed to compare surgical outcomes of transoral robotic thyroidectomy (TORT) and transoral endoscopic thyroidectomy vestibular approach (TOETVA), concurrently compared with conventional transcervical thyroidectomy (CTT). A network meta-analysis, comprising 23 studies, was performed in this study. The operative time of the CTT group was significantly shorter than that of the TOETVA and TORT groups. The hospital stay of the TOETVA group was significantly longer than that of the CTT group. Rates of transient recurrent laryngeal nerve palsy and total complications were higher in association with TOETVA than with TORT. No significant differences were found between the three groups in intraoperative blood loss, retrieved lymph nodes, postoperative pain, and other complications. Cosmetic satisfaction was significantly superior with TORT and TOETVA than with CTT. Compared with CTT, TOETVA and TORT showed superior cosmesis but no significant difference in surgical outcomes except for operative time and hospital stay.

TOETVA: a single surgeon's learning curve and a case report of CASTLE thyroid tumor

BACKGROUND

Owing to the lack of visible scars, the transoral endoscopic thyroidectomy vestibular approach (TOETVA) offers superior aesthetic outcomes compared to conventional thyroidectomy. Carcinoma showing thymus-like differentiation (CASTLE) represents a rare thyroid gland neoplasm. This study aimed to explore the TOETVA learning curve and present a case report of CASTLE.

METHODS

A study with precise 1:1 matching was conducted to assess the procedure safety and cancer control outcomes of TOETVA in comparison to conventional surgery between May 2020 and May 2023. Cumulative sum analysis was employed to optimally fit the learning curve. Subsequently, a case report of CASTLE treated with TOETVA surgery was presented.

RESULTS

The mean operative time was longer in the TOETVA group than in the open group. The TOETVA group had a higher incidence of skin numbness and excellent cosmetic outcomes compared to the open group. The learning curves for work area preparation, unilateral thyroid lobectomy, and the entire surgical process were 59, 28, and 50 cases, respectively. There were no differences between the learning and proficient groups, except for operative time, intraoperative blood loss, and drainage volume on the first postoperative day.

CONCLUSIONS

A comprehensive analysis of the TOETVA learning curve utilizing cumulative and analytical methods demonstrated the feasibility of TOETVA with regards to surgical integrity, safety, and oncological safety. This study's findings suggest that a surgeon's cumulative number of TOETVA cases exceeding 50 can reach the mastery stage. Moreover, diagnosing CASTLE is challenging and necessitates immunohistochemical detection of relatively specific markers associated with thymic epithelial tumors.

Endoscopic Thyroidectomy: A 6-Year Experience from a Tertiary Care Teaching Hospital in Western India

Background: Minimally invasive and endoscopic surgical techniques have surpassed the conventional open thyroidectomy for the treatment of thyroid nodules. Trans-axillary, Unilateral Axillo-Breast Approach (UABA), Bilateral Axillo-Breast Approach, and Trans-Oral Endoscopic Thyroidectomy Vestibular Approach (TOETVA) are the most common endoscopic procedures performed currently. This article highlights our experiences with UABA and TOETVA over a period of 6 years. Materials and Methods: Between January 2015 and December 2020, we retrospectively analyzed our experience in Endoscopic thyroidectomy with 119 patients using UABA (n = 72) and TOETVA (n = 47) in our tertiary care teaching hospital. Both approaches used the standard three-port technique. Real time angiography was performed intraoperatively using Indocyanine Green dye to delineate the vessels in all patients. Results: The mean operative time for UABA and TOETVA was 90 and 110 minutes, respectively. Estimated blood loss was 18 mL in the former and 20 mL in the latter. Temporary Recurrent Laryngeal Nerve palsy and Hypoparathyroidism were minimal with TOETVA (5 patients versus 4 patients and 7 patients versus 2 patients). Shorter duration of hospital stay was observed with UABA (3 days versus 5 days). Cosmetic satisfaction was better with TOETVA. Conclusion: Based on our 6-year experience, we propose "JJ Hospital Criteria," which we currently follow to decide which surgical approach will yield best results. UABA and TOETVA are safe, feasible, and give exceptional cosmetic satisfaction. Both approaches should be seen as complementary rather than competitive.

Clinico-pathological initial outcome of a newly adopted novel surgical technique for nodal metastatic thyroid cancer at a large-volume centre in a high-income developing country

INTRODUCTION

Thyroid cancer is the most common tumour in the endocrine system. In the past decade, the incidence of lymph node metastasis has increased, and so has the patient demand for a smaller scar. This research reports the surgical and patho-oncological short-term outcomes of a novel, minimally invasive neck dissection approach for thyroid carcinoma with lymph node metastases at the UAE's leading endocrine surgery centre.

METHODS

This study employed a prospectively maintained surgical database to retrospectively analyse relevant parameters such as surgical complications, including bleeding, hypocalcaemia nerve injury and lymphatic fistula, as well as oncological metrics such as the type of tumour and the ratio of lymph node metastasis to the number of harvested lymph nodes in 100 patients that underwent open minimally invasive selective neck dissection.

RESULTS

The study comprised 50 patients with thyroidectomy, with bilateral central compartment neck dissection (BCCND; 50%); 34 with thyroidectomy, BCCND and selective bilateral lateral compartment neck dissection (BLCND; 34%); and 16 patients with selective unilateral central and lateral compartment neck dissection by recurrent nodal disease (ULCND; 16%). The female-to-male gender ratio was 78:22, with median ages of 36 and 42 years, respectively. Histopathology findings revealed that 92% of patients had papillary thyroid cancer (PTC) and 8% had medullary thyroid cancer. The mean total number of lymph nodes removed was 22 in the BLCND group, 17 in the ULCND group and 8 in the BCCND group (p = 0.001). Furthermore, the average lymph node metastasis was significantly higher in the BLCND group (p = 0.002). The percentage of temporary hypoparathyroidism was 29.8% and it persisted for 1.3%. The lateral compartment dissection morbidity was as follows: Four male patients with tall cell infiltrative PTC presented with pre-existing vocal cord paresis, necessitating nerve resection and anastomosis, and two more developed it after surgery (1.1% of the nerve at risk). Lymphatic fistulas occurred in four patients (4%) who were treated conservatively. Two patients were readmitted due to symptomatic neck collection. Horner syndrome was discovered in just one female patient. Male gender, aggressive histology and lateral compartment dissection independently increased surgical morbidity. In a high-volume endocrine centre, the adoption of minimally invasive selective neck dissections to treat nodal metastatic thyroid cancer did not increase specific cervical surgery complications.

Robotic versus endoscopic transoral thyroidectomy in papillary thyroid cancer: A comparative analysis of surgical outcomes in 240 consecutive patients

BACKGROUND

This study compared the surgical outcomes of transoral endoscopic thyroidectomy vestibular approach (TOETVA) and transoral robotic thyroidectomy (TORT) in papillary thyroid cancer (PTC).

METHODS

The TOETVA and TORT groups comprised 119 and 121 patients between November 2016 and May 2022. Clinico-surgical outcomes and operation times were retrospectively reviewed.

RESULTS

The TORT group showed a higher number of retrieved central compartment lymph nodes, shorter hospital stays, and lower pain score after 48 h than the TOETVA group. No significant difference was observed in the other postoperative complications, including permanent vocal cord palsy. Total operation, working space creation, and endoscopic or robotic surgery times of the TORT group were longer than those of the TOETVA group.

CONCLUSIONS

TORT and TOETVA are feasible and safe. TORT may have some advantages, such as central compartment node dissection, shorter hospital stays, and pain score after 48 h in PTC, despite a longer operative time.

Transoral endoscopic thyroidectomy vestibular approach (TOETVA): initial experience in Australia

BACKGROUND

Thyroidectomy is traditionally an open procedure. The potential for and unpredictability of patients developing an unsightly anterior neck scar has led many investigators to develop various 'scarless' thyroidectomy techniques. Here we report on our initial experience, and to our knowledge, the first and largest series of this technique in Australia and New Zealand.

METHODS

Across two centres in Western Australia, three Endocrine surgeons utilized the Transoral Endoscopic Thyroidectomy vestibular approach (TOETVA). Key endpoints such as operating time, blood loss, pain scores, recurrent laryngeal nerve injury and hypoparathyroidism was collected. Data was analysed using R statistical program.

RESULTS

One hundred and two TOETVAs were performed between March 2018 and May 2021. There were 66 hemithyroidectomies, 34 total thyroidectomies (four converted to open), and two isthmusectomies. We noted a trend in median operating time decreasing over the study period. There were no cases of permanent recurrent laryngeal nerve palsy, wound infection, seroma or haematoma. We had four instances of open conversion; one temporary RLN palsy, and 12 cases of temporary hypoparathyroidism.

CONCLUSION

This is the first series of TOETVA reported in Australia and New Zealand. Our results demonstrate that with appropriate surgeon experience, training, collaboration, and in well selected patients, this is a feasible and safe thyroidectomy technique. We hope that our work will build confidence in Endocrine Surgical units seeking to develop this technique in Australia.

Phonetic features of patients with transoral endoscopic thyroidectomy

OBJECTIVE

The objective of this study was to compare phonetic outcomes of TOETVA with those of conventional transcervical thyroidectomy(OPEN).

METHODS

Retrospective chart review of total 61 patients who received thyroidectomy through OPEN (n = 34) or TOETVA (n = 27) approach in single tertiary center were enrolled.

RESULTS

There were significant differences in F0 between the two groups and there were significant changes from different time points within each group in jitter for vowel /i/. Aerodynamically, there were significant differences in mean sound pressure level for vowel /a/ and mean sound pressure level, mean air pressure, and aerodynamic resistance for syllable /pa/ between the two groups. In subjective VHI evaluations, there were no significant differences between the two groups.

CONCLUSION

This study is significant in that it has investigated voices of patients with TOETVA. Results of this study are expected to be useful for voice evaluation, treatment, and prevention in the future.

LEVEL OF EVIDENCE: 3

The global status and hotspots of research in the field of trans-oral endoscopic thyroidectomy (TOET) from 2008 to 2022

Purpose

In this study, the aim was to comprehensively analyze the current status, hotspots, and trends of trans-oral endoscopic thyroidectomy (TOET) through bibliometric analysis and by presenting the field atlas.

Methods

Web of Science Core Collection database was adopted to screen studies regarding TOET published between January 1, 2008 and August 1, 2022. The evaluation covered the criteria total number of studies, keywords, and contributions from countries/regions, institutions, journals, and authors.

Results

A total of 229 studies were covered. SURGICAL ENDOSCOPY AND OTHER INTERVENTIONAL TECHNIQUES is the largest publication in the field of TOET. The three countries that contributed the most studies were Korea, China, and the USA. The most frequently occurring core keywords in the field of TOET are vestibular approach, outcomes, experience, safety, robotic thyroidectomy, scar, video-assisted thyroidectomy and quality-of-life. The seven clusters were generated in this study: intraoperative monitoring of the laryngeal return nerve (# 0), learning curve (# 1), postoperative quality of life (# 2), central lymph node dissection and safety (# 3), complications (# 4), minimally invasive surgery (# 5), and robotic surgery (# 6).

Conclusion

The main research topics in the field of TOET place focuses on learning curves, laryngeal nerve monitoring, carbon dioxide gas bolus, chin nerve injury, surgical complications, and surgical safety. In the future, more academics will focus on the safety of the procedure and reducing complications..

Transoral endoscopic thyroidectomy vestibular approach: Results after 53 first cases

INTRODUCTION

Trans Oral Endoscopic Thyroidectomy through Vestibular Approach (TOETVA) allows access to the thyroid with the best cosmetic results as there are no visible scars.

METHODS

Here we present a prospective observational study of 53 patients which underwent TOETVA from July 2017 to June 2021.

RESULTS

Fifty-two cases (98.1%) cases were women (median age 44 years old). Thyroid nodule was the main surgical indication accounting 73.6% of cases. We performed 42 lobectomies and 11 total thyroidectomies; 4 left Central Neck Dissection (CND) were also associated. The median surgical time for port placement was 14 min and for lobectomy, total thyroidectomy and left CND were 80, 140 and 30 min, respectively. The median of hospital stay was 2 days. Dysphonia was present in 4 patients; however, laryngoscopy only confirmed laryngeal nerve impairment in 2 cases, one of them classified as permanent (1.6%). In those patients that underwent total thyroidectomy, the rate of transient hypoparathyroidism was 18.2% whereas permanent was 0%. Regarding complications associated to the new approach, transient chin numbness appeared in all patients with a variable degree of intensity.

CONCLUSTIONS

Transoral surgery is a recent approach in our Unit. Our results, based on the first 53 patients, show that it is a safe and effective approach when performed in appropriately selected patients offering the best cosmetic result. Besides, new complications associated to the approach has been shown to be transient.

"Elastic stretch cavity building" system in endoscopic thyroidectomy via the axillary approach: a case series

Background

Patients undergoing conventional endoscopic thyroidectomy via the axillary approach, which is commonly used clinically, suffered from a range of postoperative complications. This study aimed to prevent postoperative complications and evaluate patients' satisfaction with cosmetic outcomes in endoscopic thyroidectomy via the axillary with the use of "Elastic Stretch Cavity Building" System.

Methods

In this retrospective case series study, the clinical data of patients who were admitted to the Thyroid Surgery Department of Ningbo Medical Centre Lihuili Hospital between December 2020 and December 2021 for endoscopic thyroidectomy via the axillary approach under the "Elastic Stretch Cavity Building" System.

Results

A total of 67 patients were included, all surgeries were successfully completed. The operation time was 75.61 ± 13.67 minutes; the postoperative drainage volume was 109.97 ± 37.54 ml; the average postoperative hospital stay was 4 (2-6) days. There was no skin ecchymosis, effusion or infection, hypocalcemia, convulsions, upper extremity dyskinesia, and temporary hoarseness after the surgery. The patients were satisfied with the cosmetic effects, and the cosmetic score was 4 (3-4).

Conclusion

The "Elastic Stretch Cavity Building" System in endoscopic thyroid surgery via the axillary approach might reduce the risks of complications and achieve satisfactory results with the cosmetic outcomes.

Axillary channel-assisted TOETVA: An effective way to prevent mental nerve from iatrogenic injury?

Aim

To evaluate the protective effect of axillary channel-assisted (ACA) transoral endoscopic thyroidectomy vestibular approach on mental nerve.

Materials and Methods

From August 2018 to December 2020, 126 cases of thyroid micro-carcinoma patients who underwent endoscopic thyroidectomy were recruited retrospectively. Of those, 74 cases were performed with ACA trans-oral endoscopic thyroidectomy vestibular approach (ACA_TOETVA) (V and A group), 52 cases received standard TOETVA (V group). On postoperative day 1 (POD1), nylon monofilament test and numbness visual analogue scale score were conducted to evaluate the severity of numbness within the mental area, facial expression was tested to determine the motor function of lower mandible and the thickness of cutaneous and subcutaneous layers was measured with ultrasound. The other observation parameters including the time for operation and intraoperative blood loss were carefully collected.

Results

On POD1, nylon monofilament test showed that scores in the V and A group (2.9 ± 0.3) were significantly higher than V group (1.7 ± 0.5), P < 0.01, u = 254. The completion percentage of facial expression in the V and A group was 90.5% (67/74) and significantly higher than in V group (21.2%, 11/52), P < 0.01, χ2 = 62.35. The thickness increment of cutaneous and subcutaneous layer was 2.2 ± 1.2 mm in the V and A group, which was significantly less than in the V group (4.0 ± 1.2 mm), P < 0.01, u = 605. Compared with V group, the operation time (113.4 ± 22.3 min vs. 127.7 ± 25.6 min, u = 1262) and intraoperative blood loss (43.5 ± 13.4 ml vs. 51.0 ± 14.1 ml, u = 1355) were also significantly less in the V and A group.

Conclusions

The ACA transoral endoscopic thyroidectomy possesses the protective effect on mental nerve and motor function of lower mandible and facilitates the operative procedures of TOETVA.

Transoral endoscopic thyroidectomy vestibular approach (TOETVA): A novel surgical technique for scarless thyroidectomy in pediatric surgery

Transoral endoscopic thyroidectomy vestibular approach (TOETVA) is a novel surgical technique in thyroid surgery that provides a feasible opportunity to avoid a visible neck scar. In recent years, TOETVA became popular in the thyroid surgery of selected adult patients with cosmetic concerns. We conducted a right lobectomy with the TOETVA technique in a 17-year-old adolescent with a suspicious thyroid nodule the present report aimed to describe the details of the operative technique step by step. Level of evidence: LEVEL IV, case series with no comparison group.

Breast and Thyroid Surgery in 2021 and Beyond

Several studies in the literature report the association between breast and thyroid pathologies; however, the underlying causes (genetic, environmental, hormonal or immunological) have not yet been well explicated [...]

Transoral endoscopic thyroidectomy vestibular approach (TOETVA)

Transoral Endoscopic Thyroidectomy Vestibular Approach (TOETVA) is a novel technique that allows the thyroid to be approached without visible scars, as it is performed through a natural orifice. It was first described and developed in Asia where due to sociocultural reasons neck scars are considered a stigma. This technique, as we now nowadays, and its preliminary results, were first reported by Angkoon Anuwong in August 2015 at the International Association of Endocrine Surgeons (IAES) world surgery congress held in Bangkok. Here we present the TOETVA approach, step-by-step, in order it could be safely replicated, aiming also it can be spread within the therapeutic framework of endocrine surgery. However, it is important to remark that, as happens in most of remote approaches, it is only suitable for a small percentage of patients.

Comparison of Transoral Endoscopic Thyroidectomy Vestibular Approach and Conventional Open Thyroidectomy in Benign Thyroid Tumors

Conventional open thyroidectomy remains the standard treatment of surgery for benign thyroid tumors but leaves a permanent scar in the neck. We conducted this study to compare the surgical outcomes of transoral endoscopic thyroidectomy vestibular approach (TOETVA) versus conventional open thyroidectomy (COT), and thence analyze the safety and viability of this approach. Seventy-eight patients who had undergone either COT or TOETVA from 2020 to 2021 in our institution to treat benign thyroid tumors were prospectively studied. Outcomes between the two groups were analyzed, including time of operation, blood loss, hospital stay, postoperative complications, and level of satisfaction. A total of 78 patients, in which TOETVA was applied to 47 patients and COT thyroid surgery was applied to 31 patients, participated in this study. COT has a shorter operative time (59.8 ± 10.8 min versus 102.3 ± 34.9 min, p < .001). TOETVA is less painful postoperatively (visual analog scale score on day 4 of 1.1 ± 1.2 versus 1.8 ± 0.7, p < .001). There were no significant differences between TOETVA and COT groups regarding incidences of transient recurrent laryngeal nerve (RLN) injury (10.6% and 6.5%, respectively, p = .697) and both transient and permanent hypoparathyroidism (8.5% versus 3.5%, p = .644 with transient and 0% versus 6.7%, p = .166 with permanent). Other complications were comparable between two arms such as bleeding, seroma, and infection. At 3 months after surgery, the TOETVA group had the significantly higher proportion of the very satisfied level than the COT group (80.9% versus 35.4%, p < .001). TOETVA in patients with favorable features is a safe, viable alternative to open thyroidectomy regarding postoperative outcomes and provide higher satisfaction after surgery in the long term.

Complications of Trans-oral Endoscopic Thyroidectomy Vestibular Approach: A Systematic Review

This review focuses on complications linked to trans-oral endoscopic thyroidectomy via vestibular approach (TOETVA) and aimed to elucidate the procedure's initial safety profile. According to the Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA), Pubmed, Embase, and the Cochrane databases were screened till May 2021. Twenty-eight articles, nine cohorts and nineteen case series, met the inclusion criteria. Procedure-related complications were analyzed, the most important being hypoparathyroidism: transient (range=0.94-22.2%), permanent (range=1.33-2.22%), and recurrent laryngeal nerve injury: transient (range=1.9-8.8%) and permanent (range=0.59-1.42%). Surgical trauma related complications, the most prevalent being seroma, emphysema, and hematoma accounted for 2.91%. Null mortality was reported. Although current evolving experience indicates that TOETVA is safe and linked to acceptable complication rates, the method needs to be compared with the gold standard of traditional thyroidectomy in the context of sufficiently numbered cohorts and ultimately randomized controlled trials.

OUP accepted manuscript

BACKGROUND

The IDEAL Framework is a scheme for safe implementation and assessment of surgical innovation. The transoral endoscopic thyroidectomy vestibular approach (TOETVA) is a new innovation in thyroid surgery that eliminates the need for a cervical incision. Despite considerable interest and adoption worldwide, significant scepticism remains regarding the outcomes and cost-effectiveness for healthcare systems. The aim of this narrative review was to appraise the available literature and examine whether TOETVA has progressed in line with the IDEAL Framework.

METHODS

A literature review of PubMed with a focus on historical and landmark studies was undertaken to classify the evidence according to the different stages of the IDEAL Framework.

RESULTS

Several different transoral approaches were developed by a small of number of surgeon-innovators on animals and cadavers, and subsequently in first-in-human studies. The trivestibular approach emerged as the safest technique, with further refinements of this technique culminating in TOETVA. The basic steps and indications for this technique have been standardized and it is now being replicated by early adopters in many centres worldwide. The development of TOETVA has closely aligned with the IDEAL Framework, and is currently at stage 2B (Exploration).

CONCLUSION

There is need for multi-institutional collaborations and international registry studies to plan high-quality randomized trials comparing TOETVA with other remote-access approaches and collect long-term follow-up data. In countries where TOETVA has yet to be adopted, the IDEAL Framework will be a useful roadmap for government regulators and professional societies to evaluate, regulate, and provide best practice recommendations for the adoption of this technique.

Preoperative Visualized Ultrasound Assessment of the Recurrent Laryngeal Nerve in Thyroid Cancer Surgery: Reliability and Risk Features by Imaging

Background

Preoperative identification and visualization of tumor infiltration of the recurrent laryngeal nerve (RLN) in patients with thyroid cancer is important. The purpose of our study was to evaluate the reliability and feasibility of preoperative assessment by ultrasound and to identify ultrasound imaging features potentially associated with tumor infiltration of the RLN.

Methods

In this prospective study, patients undergoing thyroid cancer surgery at our institution between August 2020 and January 2021 were included, and preoperative ultrasound visualization of the RLN and thyroid lesions was performed. RLN infiltration was also confirmed surgically in all cases. Five patients with enlarged lymph nodes were selected to undergo injection of carbon nanoparticles to confirm the correctness of RLN identification by preoperative ultrasound. The repeatability of RLN assessment by ultrasound was evaluated by comparing the correlation between pre- and intraoperative, intra- and inter-group assessments. Parameters of normal RLNs according to age, sex, and body mass index were established. Finally, ultrasound imaging features of patients with RLN tumor infiltration were analyzed to identify potential risk predictors.

Results

According to the ultrasonic assessment, RLNs of 70 patients appeared normal, while 14 of those patients appeared to be infiltrated by tumors. During surgery, the 70 cases of normal RLNs were confirmed, but only 8 of the 14 suspected cases of infiltration were confirmed. In all five patients injected with carbon nanoparticles, the location of RLNs adjacent to the marked lymph nodes observed by surgeons corresponded to the RLN location identified by preoperative ultrasound. The repeatability of RLN estimation varied from moderate to excellent. There were no significant differences in cross-sectional area, width, or thickness of normal RLNs according to age, sex, or body mass index. Indistinct margin with tumor, incontinuous shape as ultrasound features by the analysis of patients with surgically confirmed RLN infiltration were associated with tumor invasion.

Conclusion

We show that preoperative ultrasound can be applied to visualize the RLN and may help predict tumor infiltration of the RLN.

Transoral endoscopic thyroidectomy vestibular approach (TOETVA)

Transoral Endoscopic Thyroidectomy Vestibular Approach (TOETVA) is a novel technique that allows the thyroid to be approached without visible scars, as it is performed through a natural orifice. It was first described and developed in Asia where due to sociocultural reasons neck scars are considered a stigma. This technique, as we now nowadays, and its preliminary results, were first reported by Angkoon Anuwong in August 2015 at the International Association of Endocrine Surgeons (IAES) world surgery congress held in Bangkok. Here we present the TOETVA approach, step-by-step, in order it could be safely replicated, aiming also it can be spread within the therapeutic framework of endocrine surgery. However, it is important to remark that, as happens in most of remote approaches, it is only suitable for a small percentage of patients.

Novel Trocars and Suspension System Application in Gasless Transoral Endoscopic Thyroidectomy Vestibular Approach Oral Endoscopic Surgery

In the current study, we reported our initial experience of gasless transoral endoscopic thyroidectomy vestibular approach (TOETVA) by novel trocars and a suspension system. Between February 2019 to September 2020, thyroid cancer patients with indicated central lymph node metastasis by imaging examination who had received gasless TOETVA by our designed trocars and suspension system in The First Affiliated Hospital of University of Science and Technology of China were reviewed. A total of 95 thyroid cancer patients that received gasless TOETVA were included in this analysis. Of note, 73 cases underwent one-sided lobectomy and the remaining 22 cases underwent total thyroidectomy. All thyroid cancer patients underwent central lymph node dissection (CND). The average total examined lymph nodes number was 8.55 ± 5.67 per individual. No serious complications occurred during or after the operation besides one patient who had a short-term recurrent laryngeal nerve (RLN) deficit and one patient who had delayed postoperative bleeding. In conclusion, the use of novel trocars and a suspension system can effectively improve the safety and efficacy of TOETVA.

The sensorimotor changes of the lower lip and chin after transoral endoscopic thyroidectomy vestibular approach

The transoral endoscopic thyroidectomy vestibular approach (TOETVA) can lead to abnormal sensorimotor changes in the lower lip and chin because of its incision design. This study aimed to explore the surgical outcomes of these changes after TOETVA. A total of 122 patients who underwent TOETVA were reviewed. The original incision design was used for the 39 patients in group A and a modified incision design was used for the 83 patients in group B. The sensorimotor changes in the lower lip and chin were compared. Varying degrees of paresthesia of the lower lip and chin (PoLC) were noted in all group A patients. Approximately 20.5% of group B patients did not suffer from PoLC, and the degree of PoLC in group B was significantly lower (P < 0.001). Abnormal motor function of the lower lip was noted for 23.1% of the patients in group A and 2.4% of those in group B. The incision design plays an important role in the morbidity of sensorimotor changes in the lower lip and chin. Our modified incision design seems minimally invasive and feasible for patients who undergo TOETVA.

A comparison of efficacy and quality of life between transoral endoscopic thyroidectomy vestibular approach (TOETVA) and endoscopic thyroidectomy axillo-breast approach (ETABA) in thyroid surgery: non-randomized clinical trial

PURPOSE

Recently, there are many new surgical methods of endoscopic thyroidectomy, which have advantages in cosmetic results while do not increase the complication rates. This study was conducted to evaluate and compare both intra- and post-operative results and quality of life between TOETVA and endoscopic thyroidectomy axillo-breast approach (ETABA).

MATERIALS AND METHODS

A non-randomized, patient preference clinical trial was performed in Otorhinolaryngology, Head and Neck surgery department, HRH Princess Maha Chakri Sirindhorn Medical center. Patients who decided to go for endoscopic thyroidectomy were allocated into two groups. Demographics data, operative time, intra-operative blood loss, post-operative pain score, length of hospital stay, complications were collected. Overall satisfaction was evaluated by visual analogue scale and quality of life was evaluated by SF-36 questionnaires.

RESULTS

22 patients were totally included and equally allocated in 2 groups (11 patients per group). All of the operations were lobectomy. There was no significant difference in demographic data. The results showed that pain score at 3 days post-operation and average pain score were significantly higher in TOETVA group. Average pain score was 3.67 ± 1.11 in ETABA group and 5.15 ± 1.35 in TOETVA (p = 0.011); however, the operative time, intra-operative blood loss, length of hospital stay, complications and overall satisfaction were not significantly different. Different change in the quality of life was not detected in both groups.

CONCLUSION

Transoral endoscopic thyroidectomy vestibular approach and ETABA both have comparable results and do not worsen the quality of life.

Transoral endoscopic thyroidectomy vestibular approach (TOETVA): Our outcomes from Turkey

OBJECTIVES

The Transoral Endoscopic Thyroidectomy Vestibular Approach (TOETVA) was described in 2016 and had its case series published. This study aimed to present the largest TOETVA case series performed in Turkey.

MATERIAL AND METHODS

Data from 52 patients who underwent TOETVA procedure between February 2018 and October 2019 were analyzed retrospectively. Demographic data, duration of operation, blood loss, rate of conversion to open surgery, radiological findings, pathological outcomes, and complications were analyzed.

RESULTS

All patients were female. Mean duration of the operation was 192 ± 45 minutes, mean blood loss was 39 ± 47 mL, and the ratio of surgical site infection was 6% (3/50). In two (4%) patients, TOETVA was converted to open surgery. Temporary and permanent recurrent laryngeal nerve (RLN) paralysis was observed in 2 (4%) and 0 patients, respectively. Temporary and permanent hypoparathyroidism was observed in 10 (20%) and 0 patients, respectively.

CONCLUSION

TOETVA procedure is the most recently defined NOTES technique for endocrine surgery. In experienced healthcare centers, TOETVA can achieve outcomes similar and even better than the ones obtained with open surgery. The complication rates, durations of operation, surgical site infection, and blood loss parameters that we observed in our experience are similar to the ones reported in the literature.

Comparison of postoperative outcomes between bilateral axillo-breast approach-robotic thyroidectomy and transoral robotic thyroidectomy

Background

The use of robotic systems for thyroidectomy has increased as it enables more diverse approaches than the conventional open method. The aim of this study was to compare the clinical outcomes of Transoral Robotic Thyroidectomy (TORT) and Bilateral Axillo-Breast Approach-Robotic Thyroidectomy (BABA-RT).

Methods

This study was designed as a retrospective study. The included patients who underwent surgery by BABA-RT or TORT approach in our facility between 2008 and 2018. All surgeries were performed by one surgeon. Total thyroidectomy with central node dissection (CND) was performed only if tumors were >4 cm and had extrathyroidal extension, clinically apparent lymph node or distant metastases. In all other cases, lobectomy ± CND was performed.

Results

The group treated with TORT comprised 248 patients and the group that underwent BABA-RT had 316 patients. The number of retrieved lymph node (LN) was higher in the TORT group (4.9±4.4 vs. 4.2±4.9; P=0.01). There were no significant differences between the TORT and BABA-RT groups in concerns to the location of the tumor. Postoperative hospital stay was also shorter in the TORT group when compared with the BABA-RT group (2.8±0.90 vs. 3.4±0.97 days, P=0.012). Operative time was significantly shorter in the TORT group (204.11±40.19 vs. 243.78±57.16 min, P<0.01).

Conclusions

When comparing a total of 248 patients treated with TORT versus 316 with BABA-RT. TORT not only has advantages in better cosmetic outcomes with minimized postoperative scars, but also shows comparable, or even superior, surgical outcomes with shorter operation time than the BABA-RT procedure.

Complications of Transoral Thyroidectomy: Overview and Update

Transoral thyroidectomy via the vestibular approach has become popular worldwide, with advantages including less surgical morbidity, excellent postoperative cosmesis, and superior functional voice outcomes. Several studies have reported that the surgical outcomes of the transoral approach were comparable to those of the conventional transcervical approach in selected patients. However, unusual complications, such as CO2 embolism, mental nerve injury, surgical space infection, skin perforation, burns, and trauma have been noted in transoral thyroidectomy. This paper aims to review and provide updated information on these complications and their management. Routine intraoperative neural monitoring is required to avoid laryngeal nerve palsy in the transoral approach. To prevent CO2 embolism, surgeons need to be careful not to injure the anterior jugular vein, and the CO2 insufflation pressure should be set as low as 4-6 mmHg. To avoid mental nerve injury, vestibular incisions should be placed in the safety zone, and dissection of the vestibular area and chin should be minimized. In conclusion, recognizing the possibility of complications and understanding their prevention and management are important for patient safety and the success of the transoral approach.

Surgical approaches to thyroid

Thyroidectomy is the most frequent procedure in endocrine surgery. The conventional approach through a collar incision, as described by Kocher in XIX^th century, has become the "gold standard". It is continuously evolving in spite of, many years ago, it showed to be safe and efficient with quality standards difficult to beat. Endoscopic and robotic surgery have developed "new approaches" to thyroid in order to improve the cosmetic results, looking even for invisible scars. We have done a thoughtful review of most of them trying to understand their benefits and drawbacks. Currently none of these "new approaches" have been shown to be better than conventional open thyroidectomy beyond offering a better cosmetic result. Besides, only a small percentage of patients can benefit of them. However, most of these approaches will remain if they treat the diseased thyroid and also improve the quality of life of our patients.

Minimally invasive video-assisted thyroidectomy and transoral video-assisted thyroidectomy: A comparison of two systematic reviews

Background:

We compared two systematic reviews, one focusing on transoral video-assisted thyroidectomy (TOVAT) and the other on minimally invasive video-assisted thyroidectomy (MIVAT), to highlight the pros and cons that can determine the choice of one or the other procedure.

Materials and Methods:

PubMed, Scopus and ISI Web of Science databases were searched for relevant articles published from 2000 to June 2018. Both searches were performed using the same keywords. All articles describing human surgical case series of any size were included, while the following were excluded: articles published in languages other than English, case reports, reviews, early cadaver and animal studies and old reports of cases now included in more recent works. Application of the above selection criteria yielded 151 articles on TOVAT and 246 on MIVAT. Of these, 34 articles were selected for inclusion in the present study: 17 for the TOVAT group and 17 for the MIVAT group. The comparison was made considering the most common variables used in evaluating thyroid surgery procedures. The statistical methods used were Cohen's delta, Student's t-test and the non-parametric Mann–Whitney U-test.

Results:

The variable 'operative time' was found to show a very large effect size, and 'hospital stay' also differed significantly between the MIVAT and TOVAT groups.

Conclusions:

TOVAT and MIVAT should not be considered in competition with each other, but seen simply as alternative choices. Both appear to be safe methods, comparable in terms of post-operative complications, although the main reason for using TOVAT seems to be purely aesthetic.

Robotic thyroid surgery

Various remote access robotic thyroidectomy techniques have been developed using the da Vinci® surgical system (Intuitive Surgical Inc., Sunnyvale, CA) to hide or avoid neck scarring and overcome the limitations of endoscopic thyroidectomy. Among those used today are the gasless transaxillary approach, the bilateral axillo-breast approach (BABA), the gasless postauricular facelift approach, and the transoral approach. Especially, the recently introduced transoral approach (including robotic and endoscopic procedures) is prominent and now popular worldwide. The most significant advantages of remote access robotic thyroidectomy are excellent postoperative cosmesis and voice outcomes. The important limitations to the adoption of robotic thyroidectomy are the difficult technique, high complication rate during the learning curve, and high cost. In addition, cultural differences, longer operative times, and medicolegal issues are a barrier to the diffusion of robotic thyroidectomy. However, remote access robotic thyroidectomy is feasible, and the outcomes are comparable to those of conventional transcervical thyroidectomy if performed by experienced surgeons in highly selected patients. This article reviews the evolution and recent advances in robotic thyroid surgery.

Minimally Invasive Approaches for Thyroid Surgery-Pitfalls and Promises

PURPOSE OF REVIEW

To provide an overview of the feasibility and safety of current minimally invasive remote-access approaches for thyroid surgery, in view of the amounting new challenges and paradigm shifts in the management of thyroid pathologies.

RECENT FINDINGS

Over the past two decades, several remote-access approaches for thyroid surgery have been developed to improve cosmesis; however, none has been widely adopted extensively in the Western world. The recently emerged transoral endoscopic thyroidectomy via vestibular approach (TOETVA) is the only true minimally invasive approach, completely avoiding skin incisions. It has a relatively short learning curve, midline surgical view, accessible surgical equipment, and relatively broad inclusion criteria with promising surgical outcomes as reported to date. TOETVA has proven to be safe and feasible for carefully selected patients. Further experience and long-term follow-up are needed to define the added value of TOETVA except for improved cosmetic outcome.

Comparison of Transoral Thyroidectomy Vestibular Approach and Unilateral Axillobreast Approach for Endoscopic Thyroidectomy: A Prospective Cohort Study

Background: Various approaches for endoscopic thyroidectomy have been developed recently that improve the cosmetic outcome, and some are even scar free. In this study, we compared the safety and surgical outcomes of transoral endoscopic thyroidectomy vestibular approach (TOETVA) and unilateral axillobreast approach (UABA) thyroid surgery performed by a single surgeon. Materials and Methods: We conducted a prospective cohort study among 101 patients undergoing endoscopic thyroidectomy from 2018 to 2019 in our institution. The factors analyzed included patients' clinical characteristics, types and time of operation, blood loss, hospital stay, postoperative complications, and cosmetic satisfaction. Results: Among 101 patients, 51 underwent TOETVA and 50 had UABA surgery. UABA has shorter operative time for lobectomy (91.7 ± 16.5 minutes versus 50.4 ± 6.8 minutes, P < .001), whereas TOETVA is associated with less postoperative pain (visual analogue scale score day 1 of 4.6 ± 1.0 versus 5.8 ± 1.0, P < .001). There were no significant differences between TOETVA and UABA groups regarding rates of transient recurrent laryngeal nerve injury (9.8% versus 2.0%, P = .205) and hypothyroidism (11.5% versus 2.0%, P = .112), in which all patients fully recovered 6 months after surgery and most of them were satisfied with the cosmetic result. Conclusions: Both TOETVA and UABA have been shown to be effective and safe surgical options for endoscopic thyroid surgery, as well as gave excellent cosmetic result. Each approach has its own advantages and disadvantages, and choice of technique should be tailored for each individual, and patient preference should be integrated in the treatment plan.

Transoral thyroid and parathyroid surgery via the vestibular approach-a 2020 update

Transoral endoscopic thyroidectomy and parathyroidectomy via the vestibular approach (TOET/PVA or TOETVA-TOEPVA) is the latest remote-access technique employed in the central neck. As the only approach that does not leave any cutaneous incision, (TOET/PVA) has become popular in both the Far East and Western series since its original description in 2015. More than just a "scarless" surgery, (TOET/PVA) has been associated with a short learning curve, access to the bilateral central neck compartments, few surgical contraindications, minimal complications, and minimal additional instrumentation. To date, more than 2,000 cases have been completed, including more than 400 in North America, demonstrating brisk utilization of a novel technique relative to earlier remote access central neck approaches. Herein, we describe updates that continue to improve the safety and efficacy of the procedure.

Institutional experience of 200 consecutive papillary thyroid carcinoma patients in transoral robotic thyroidectomy surgeries

BACKGROUND

We evaluated the outcomes of patients with papillary thyroid carcinoma (PTC) who underwent transoral robotic thyroidectomy (TORT).

METHODS

We retrospectively analyzed the perioperative outcomes of 200 patients (170 women and 30 men) with PTC who underwent TORT at a single center between March 2016 and February 2018.

RESULTS

There were 182 and 13 cases of lobectomy and total thyroidectomy, respectively, with corresponding mean operative times of 200.6 ± 31.2 and 265.7 ± 63.0 minutes. On average, 5.6 ± 3.45 lymph nodes were retrieved per patient. There were 12 cases of perioperative morbidity. No conversion to endoscopic or conventional open surgery was noted. In a subgroup analysis for predictors of difficult TORT, patient sex was the only factor showing a significant operative time difference between a difficult and a nondifficult thyroidectomy.

CONCLUSION

TORT can be performed safely in patients with PTC without serious complications.

Evaluation of the efficacy of postoperative antibiotic treatment in transoral endoscopic thyroidectomy: a prospective randomised controlled trial

Transoral endoscopic thyroid surgery (TOET) is a new, minimally-invasive approach that does not result in a scar in the anterior neck. To prevent infection of the surgical site from oral cavity flora into the thyroidectomy area, postoperative antibiotics are generally given orally for 3-7 days. However, there is no clinical evidence to support this approach. This study was an open-label, randomised, controlled trial to evaluate the clinical usefulness of postoperative antibiotics given orally to patients having TOET. Patients were randomly assigned to receive amoxicillin-clavulanate 625mg orally three times a day for a week after operation (treated group) or no antibiotics (untreated group). Fifty patients - 25 treated and 25 untreated - were enrolled. Maximum body temperature, pulse rate, white blood cell count, and C-reactive protein concentrations did not differ between the two groups. Evaluation of the surgical site showed no significant differences between them. Seven patients in the treated group developed nausea, vomiting, and diarrhoea compared with none in the untreated group. The results suggest that postoperative oral antibiotics are not essential after TOET. Large-scale prospective series are required to confirm this finding.

[Transoral endoscopic thyroid surgery]

OBJECTIVE

To analyze own initial experience of transoral thyroid surgery.

MATERIAL AND METHODS

There were 7 patients thyroid nodules who underwent surgery for the period from March 2018 to May 2019. All patients signed an informed consent to be included in the study. Surgical approach was performed through three incisions in the lower arch of the vestibule of the mouth with deployment of 10 mm endoscope and two 5 mm tools. Gas insufflation was used. All patients were females aged 43.3±11.8 years. Thyroidectomy was performed in 2 cases, hemithyroidectomy - in 5 patients. Dimensions of nodules varied from 10 to 42 mm.

RESULTS

Mean time of hemithyroidectomy and thyroidectomy was 206.4±63.8 and 232±37.5 min, respectively. Papillary carcinoma was histologically verified in 1 case. Injuries of recurrent laryngeal nerve, postoperative hypocalcemia and local complications were absent. Drainage was not applied. Postoperative hospital-stay was 3.7±1.1 days.

CONCLUSION

Transoral approach to the thyroid gland is technically feasible with standard endoscopic instruments, safe for important anatomical structures and more precise due to the optical capabilities of endoscopic equipment. Any types of procedures are possible. Undoubtedly, aesthetic outcome is also favorable.

Safety and efficacy of transoral robotic and endoscopic thyroidectomy: The first 100 cases

BACKGROUND

The aim of this study was to evaluate the safety and efficacy of transoral robotic and endoscopic thyroidectomy.

METHODS

We analyzed and compared the first 100 cases of transoral robotic (71 cases) and endoscopic (29 cases) thyroidectomy with 207 cases of conventional transcervical thyroidectomy.

RESULTS

Transoral thyroidectomy was completed successfully in all patients, except for three who were converted to the robotic facelift or transcervical approach. The mean operative time of the transoral procedure was significantly longer than that of the conventional procedure. Perioperative complications such as hypoparathyroidism, vocal cord palsy, hematoma, and seroma did not differ between the two groups. However, there were some unusual complications such as CO₂ embolism, surgical site infection, skin trauma, burn, and ecchymosis in transoral thyroidectomy. Postoperative cosmesis was significantly better in the transoral group.

CONCLUSION

Transoral robotic and endoscopic thyroidectomy is feasible and comparable to conventional transcervical thyroidectomy in highly selected patients.

Modified equipment for facilitating the transoral vestibular approach to endoscopic thyroidectomy

Objectives:

The objectives of the study were to investigate the improvement in operation time for thyroid surgery gained using a modified endobag and suture and to accelerate the learning process for novice endoscopic surgeons.

Materials and Methods:

A retrospective study was conducted between 2 June 2015 and 1 November 2018. Medical records of patients who underwent transoral endoscopic thyroidectomy vestibular approach (TOETVA) were retrieved and analysed. Comparisons of operative time with or without the use of modified equipment were calculated by the unequal variance t-test in lobectomy and isthmectomy groups.

Results:

Medical records of 102 patients (mean age: 39.1 years) were analysed. The size of thyroid nodule averaged 4.0 cm (range: 1.0–13.0 cm). TOETVA was applied for right lobectomy (57.8%), left lobectomy (34.3%), isthmectomy (3.9%) and total thyroidectomy (3.9%). Early in our experience, TOETVA required 168 min, whereas following the introduction of the modified endobag and extracorporeal suture, operative time was reduced to 30 min (P > 0.05).

Conclusions:

The use of modified equipment permitted shorter operation times. The time difference was not statistically significant but does represent a significant time-saving. The use of the modified equipment will simplify and speed up the learning process for novice endoscopic surgeons.

Safety and Outcomes of the Transoral Endoscopic Thyroidectomy Vestibular Approach

Importance

Natural orifice transluminal endoscopic surgery thyroidectomy is a novel approach to avoid surgical scars.

Objective

To compare the safety and outcomes of the transoral endoscopic thyroidectomy vestibular approach (TOETVA) with those of open thyroidectomy (OT).

Design, Setting, and Participants

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.

Main Outcomes and Measures

Operative time, blood loss, and complications related to thyroid surgery.

Results

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.

Conclusions and Relevance

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.