Outcomes of Minimally Invasive Thyroid Surgery - A Systematic Review and Meta-Analysis

Did scarless thyroidectomy meet expectations? An evaluation in the aspect of cosmesis: A single-centre prospective study

OBJECTIVE

Thyroidectomy is among the most commonly performed endocrine surgeries. Concerns regarding cosmetic outcomes and pain management have led to various surgical innovations. This study compares post-operative patient satisfaction based on cosmesis and expectations between open thyroidectomy (conventional open thyroidectomy [COT]) and transoral endoscopic thyroidectomy vestibular approach (TOETVA).

PATIENTS AND METHODS

Female patients aged 18-65 years who underwent thyroidectomy for benign conditions were included. Patients were divided into two groups: COT and TOETVA, with 20 patients in each. Post-operative evaluations were conducted on days 15 and 30 using the Vancouver Scar Scale, the modified Stony Brook Scar Evaluation Scale and general/visual satisfaction questionnaires.

RESULTS

Participants rated their surgeries on a scale of 1 (poor) to 4 (excellent) on days 15 and 30. No significant difference in visual scores was observed between groups. However, overall satisfaction scores were higher in the COT group on day 15 (3.5 ± 0.5 vs. 2.7 ± 0.9, P = 0.004) and day 30 (3.7 ± 0.5 vs. 3.1 ± 0.8, P = 0.021). Satisfaction scores and incision site oedema showed no significant differences between groups, but hyperaemia was significantly lower in the TOETVA group on day 30. Scar length was also significantly shorter in the TOETVA group.

CONCLUSION

Higher satisfaction in the COT group may result from post-operative pain and transient chin numbness in the TOETVA group, alongside short follow-up period. Longer-term studies could better evaluate these differences. The lack of a significant difference in satisfaction suggests that patients' expectations-shaped by the surgical approach they independently choose-may significantly influence their overall satisfaction. While satisfaction scores were similar, TOETVA provides a notable cosmetic advantage due to hidden incisions, making it particularly appealing for patients with aesthetic concerns. This technique represents a significant advancement in achieving patient-centred outcomes.

Changes in thyroid surgery over last 25 years

In the last 25 years, there have been significant advances in the diagnosis and treatment of thyroid disorders. The aim of this study was to analyze 25 years of experience in thyroid surgery in high volume endocrine center in terms of demographic changes, indications for surgical treatment, the type of thyroid surgery and complications. Clinical material (3748 patients) from the years 1996-2020 was analyzed by compering two Periods: I (1996-2003) vs. II (2011-2015/2018-2020). The percentage of patients operated on for thyroid cancer increased (p < 0.00001) and the extent of thyroid surgery changing from partial to total excision was statistically significant (p < 0.00001). The increase in the extent of thyroidectomy did not affect the overall recurrent laryngeal nerve palsy (p = 0.1785), but resulted in an increase of postoperative clinical hypoparathyroidism (p < 0.00001). The introduction of new technologies, such as intraoperative nerve monitoring of the recurrent laryngeal nerves had a significant impact on the changes in thyroid surgery over 25 years.

Efficacy and Safety of Robotic Bilateral Axillo-Breast Approach Versus Robotic Gasless Axillary Approach for Thyroidectomy: A Systematic Review and Meta-Analysis

OBJECTIVES

To evaluate the comparative efficacy and safety of robotic thyroidectomy techniques, including the robotic bilateral axillo-breast approach (BABA) and the robotic gasless axillary approach (GAA).

DATA SOURCES

A comprehensive literature search was conducted across 5 major electronic databases (PubMed, Embase, Cochrane Library, Web of Science, and Scopus) to identify relevant studies published until May 2024.

REVIEW METHODS

Analysis was conducted using RevMan 5.4 software with pooled mean and rate ratios calculated with 95% CIs.

RESULTS

A total of 73 studies, comprising 70 eligible for meta-analysis, were included. Compared with robotic GAA, robotic BABA was associated with significantly longer operative time (pooled mean: 64.65 min, 95% CI: 51.77-77.53, P<0.00001), increased hospital stay (pooled mean: 1.24 d, 95% CI: 0.92-1.56, P<0.00001), and higher intraoperative bleeding (pooled mean: 44.90 mL, 95% CI: 26.99-62.81, P<0.00001). While no significant differences were observed in the rates of hypoparathyroidism, recurrent laryngeal nerve palsy, chyle leakage, seroma, hematoma, or infection, the incidence of Horner syndrome was significantly higher in the BABA group (pooled risk ratio: 0.01, 95% CI: 0.00-0.05, P=0.003).

CONCLUSIONS

Robotic BABA was associated with longer operative times, increased hospital stays, and higher intraoperative bleeding compared with Robotic GAA, although both techniques demonstrated comparable safety profiles for most outcomes. The higher incidence of Horner syndrome with BABA should be considered when selecting the optimal surgical approach for thyroidectomy.

Use of technologies in thyroid surgery: Latin American Thyroid Society Surgical Affairs Committee Expert Opinion. Part 1

Thyroidectomyis the most frequent endocrine surgical treatment for problems such as goiter, thyroid cancer, and Graves' disease. The global incidence of goiter ranges from 5%-20%, with a notably high frequency in less wealthy countries, and the incidence of thyroid cancer is on the rise due to the greater use of diagnostic imaging. Despite medical options, surgery remains essential. Surgical advancements such as blood vessel sealing technology, intraoperative laryngeal nerve neuromonitoring (IONM), remote access surgery, and parathyroid fluorescence have transformed thyroid surgery. Vessel sealing technologies reduce operative time and blood loss, whereas IONM preserves the laryngeal nerves. Remote access surgery, which includes a variety of techniques, produces results similar to those of open thyroidectomy with a longer operative time. Fluorescence enhances parathyroid detection and lowers the risk of temporary hypoparathyroidism. Economic studies reveal cost discrepancies, with advantages particularly visible in health care systems that depend on surgical time. While these advancements promise better patient outcomes, their accessibility and cost-effectiveness remain issues, particularly in Latin America. Recognizing these concerns, the Latin American Thyroid Society's Surgical Affairs Committee conducted an extensive review of emerging thyroid surgery technologies to guarantee their proper use in the area.

Robotic Revolution in Thyroid Surgery: An Umbrella Review of Clinical Outcomes

Objective

This umbrella review aims to evaluate the clinical outcomes of robotic-assisted thyroid surgery compared to traditional endoscopic and open surgical approaches.

Data Sources

We conducted a systematic search of PubMed, EMBASE, and Cochrane Database through August 2024.

Review Methods

We conducted a comprehensive analysis of systematic reviews and meta-analyses that compare robotic-assisted thyroid surgery with endoscopic or open methods. The primary outcomes assessed include surgical efficiency indicators, general postoperative complications, specific complications (nerve and endocrine), postoperative recovery and patient experience, and recurrence and long-term prognosis. The methodological quality of the included reviews was assessed using the AMSTAR2 tool.

Results

Of the 1987 articles retrieved, 21 were eligible. Robotic surgery, though associated with longer operative times, offers distinct advantages in terms of precision. Although robotic surgery shows some variation in central lymph node dissection and an increase in postoperative drainage, its safety is comparable to both open and endoscopic techniques. Additionally, robotic surgery demonstrates superior cosmetic outcomes and shorter hospital stays from multiple approaches, though its high costs remain a significant factor. In terms of recurrence and survival rates, no significant differences were observed between robotic and open surgery.

Conclusion

Robotic surgery choices should balance benefits, costs, and patient needs. As technology and skills improve, efficiency and cost-effectiveness may increase, expanding its clinical role.

Comparison of short-term outcomes following minimally invasive (endoscopic/robotic) vs open thyroidectomy for patients with thyroid cancer

Background

Selection between open thyroidectomy (OT) and minimally invasive (endoscopic/robotic) thyroidectomy for patients with thyroid cancer has been a subject of considerable debate. Comprehensive analysis of the short-term outcomes of endoscopic thyroidectomy (ET), robotic-assisted thyroidectomy (RT) and open thyroidectomy (OT) for thyroid cancer using a large-scale dataset is important.

Methods

This cohort study evaluated the outcomes of patients receiving ET, RT or OT for thyroid cancer from January 1, 2003, to December 31, 2022. Propensity score matching (PSM) was performed among patients treated with ET, RT or OT to balance covariates distribution. This study involved single-institution patients (aged 18-70) who had undergone ET, RT or OT for thyroid cancer.

Results

The study included 11,066 thyroid cancer patients (OT group- mean (SD) age: 42.45 (10.84) years; ET group- mean (SD) age: 36.75 (9.32) years and RT group- mean (SD) age: 40.27 (10.42) years). After PSM for demographic and clinical characteristics, 908 matched pairs of patients (ET vs OT) and 1480 matched pairs (RT vs OT) were included for further analysis. Complication analysis revealed that RT was associated with a lower rate of transient hypoparathyroidism (339 (22.9%) vs 687 (46.4%); P < 0.001), a lower rate of permanent hypoparathyroidism (4 (0.3%) vs 16 (1.1%); P = 0.012) and a lower rate of transient recurrent laryngeal nerve injury (63 (4.3%) vs 89 (6.0%); P = 0.037).

Conclusion

This cohort study analyzed the short-term outcomes between ET, RT and OT in a large sample of patients with thyroid cancer over a period of two decades. PSM provided a comparable cohort, and the results suggested the advantage of RT, which reduced Clavien-Dindo grade Ⅰ complications in the surgical treatment of thyroid cancer.

The recurrent laryngeal nerve and extralaryngeal branches in relation to the inferior thyroid artery, Berry's ligament, tracheal groove, and Zuckerkandl tubercle: an experience of 60 thyroidectomies

AIM

The aim of this study was to examine the anatomical variations of the inferior laryngeal nerve compared with its extralaryngeal branches, the inferior thyroid artery, Berry's ligament, the tracheal groove, and the tubercle of Zuckerkandl, as encountered during thyroid gland operations. This is a case series conducted at the Anticancer Hospital of Thessaloniki "Theageneio" between October 2021 and May 2022.

Comparison of the degree of patient satisfaction between transoral thyroidectomy and open thyroidectomy: a survey-based study

BACKGROUND

Recent advances in thyroid surgery techniques have increased the number of patients undergoing transoral thyroidectomy, and many patients are concerned about post-thyroidectomy cosmetic effects. This study aimed to compare patient satisfaction after transoral versus conventional thyroidectomy.

METHODS

This study was conducted from August 2021 to January 2022 at Gangnam Severance Hospital (Seoul, South Korea). A total of 91 patients underwent transoral endoscopic thyroidectomy (TOET) or open thyroidectomy performed by a single surgeon. The Hospital Anxiety and Depression Scale (HADS), Pain Catastrophizing Scale (PCS), and 15-Item Quality of Recovery (QoR-15) postoperative day (POD)#-1 surveys were administered before the surgery. The QoR-15 POD#1 and #2 surveys were administered after the surgery. The Post-traumatic Stress Disorder Checklist surveys were administered on the first day of the outpatient visit after discharge. The survey results were compared to determine the differences between both groups.

RESULTS

Only the HADS-Depression survey scores differed significantly between the TOET and open thyroidectomy groups (4.22 ± 0.781 and 5.52 ± 0.84, respectively; P = .039). Multivariable analysis, adjusted for age and weight differences between the conventional and TOET groups, revealed no differences in any of the survey scores, including the HADS-Depression scores. Therefore, no differences were observed in the survey scores between the TOET and open thyroidectomy groups.

CONCLUSIONS

The subjective postoperative stress about pain and the degree of recovery after surgery were similar between the two groups. Thus, there would be no difference in the patient's satisfaction for surgery between the two groups.

Anatomical recognition artificial intelligence for identifying the recurrent laryngeal nerve during endoscopic thyroid surgery: A single-center feasibility study

Background

We investigate the feasibility of using artificial intelligence (AI) to identify the recurrent laryngeal nerve (RLN) during endoscopic thyroid surgery and evaluated its accuracy.

Methods

In this retrospective study, we develop an AI model using a dataset of endoscopic thyroid surgery videos, including hemithyroidectomy procedures performed between April 2019 and September 2023 at the National Cancer Center Hospital East, Chiba, Japan. Semantic segmentation deep learning methods were applied to analyze the endoscopic thyroid surgery videos.

Results

Forty endoscopic thyroid surgery videos, all in high definition or better quality, were analyzed. The Dice values were 0.351, 0.568, and 0.746 for the inferior thyroid artery, RLN, and trachea, respectively. Data augmentation was performed by cropping, standardizing, and resizing to reduce false positives and improve accuracy.

Conclusions

The AI model showed high recognition accuracy of the RLN and trachea. This method holds potential for assisting in future cervical gasless endoscopic surgeries.

Progress in gasless endoscopic thyroidectomy

Gasless endoscopic thyroidectomy obviates the necessity for carbon dioxide insufflation to establish a surgical workspace, thus mitigating the potential complications associated with this practice. This technique presents several benefits, such as the maintenance of neck functionality, minimal scarring, and enhanced visibility of the surgical field, which contribute to its extensive adoption in clinical settings. The objective of this study is to synthesize the current methodologies of gasless endoscopic thyroidectomy and to evaluate the advantages and disadvantages inherent to each technique. It aims to offer theoretical insights to assist surgeons in determining the most suitable approach for gasless endoscopic thyroidectomy in their clinical practice.

Detailed analysis of learning phases and outcomes in robotic and endoscopic thyroidectomy

BACKGROUND

Thyroid surgery has undergone significant transformation with the introduction of minimally invasive techniques, particularly robotic and endoscopic thyroidectomy. These advancements offer improved precision and faster recovery but also present unique challenges. This study aims to compare the learning curves, operational efficiencies, and patient outcomes of robotic versus endoscopic thyroidectomy.

METHODS

A retrospective cohort study was conducted, analyzing 258 robotic (da Vinci) and 214 endoscopic thyroidectomy cases. Key metrics such as operation duration, drainage volume, lymph node dissection outcomes, and hypoparathyroidism incidence were assessed to understand surgical learning curves and efficiency.

RESULTS

Robotic thyroidectomy showed a longer learning curve with initially longer operation times and higher drainage volumes but superior lymph node dissection outcomes. Both techniques were safe, with no permanent hypoparathyroidism or recurrent laryngeal nerve damage reported. The study delineated four distinct stages in the robotic and endoscopic surgery learning curve, each marked by specific improvements in proficiency. Endoscopic thyroidectomy displayed a shorter learning curve, leading to quicker operational efficiency gains.

CONCLUSION

Robotic and endoscopic thyroidectomies are viable minimally invasive approaches, each with its learning curves and efficiency metrics. Despite initial challenges and a longer learning period for robotic surgery, its benefits in complex dissections may justify specialized training. Structured training programs tailored to each technique are crucial for improving outcomes and efficiency. Future research should focus on optimizing training protocols and increasing accessibility to these technologies, enhancing patient care in thyroid surgery.

Patient satisfaction and operator proficiency in gasless transaxillary endoscopic thyroidectomy under IONM: a retrospective cohort study

Background

This study aims to evaluate the surgical safety and effectiveness of gasless transaxillary endoscopic thyroidectomy (GTET), assess patients' short-term perceptions and long-term outcomes, and delineate the learning curve and key surgical techniques of the operators.

Materials and methods

Clinicopathological and postoperative follow-up data from patients with unilateral thyroid cancer in the same period were collected. These patients were divided into the GTET group and the traditional open surgery group to compare and analyze the differences and explore the factors affecting the learning curve of GTET.

Results

Patients who chose GTET had better general health and thyroid conditions than those in the open group, and the quality of postoperative life was better in the GTET group than in the open group, with the main differences between the two groups being appearance and neck and shoulder function. The GTET learning curve in this study peaked at 19 cases, with slight differences between left and right, and a larger sample size is still needed to explore the factors affecting the learning curve.

Conclusions

GTET has a reliable safety and efficacy profile for patients with unilateral thyroid cancer. Intraoperative nerve monitoring (IONM) techniques require some adaptation in GTET. In some respects, patients' postoperative experience and quality of life are superior to those of conventional open surgery. There is a learning curve for GTET, but large samples are still needed to explore its true significance.

[Indications and technique for transoral thyroid gland and parathyroid gland surgery]

The conventional Kocher collar incision is the standard access to the thyroid and parathyroid glands. Although the incision length has been significantly shortened in recent years with this approach, there is increasing interest among patients in a surgical technique without visible scars in the décolleté. Transoral endoscopic thyroid gland surgery via the vestibular approach (TOETVA) is a modern technique that can be learned relatively quickly and leaves no visible scars because it is carried out exclusively through a natural orifice (natural orifice transluminal endoscopic surgery, NOTES). For retrieval of larger specimens, the transoral approach can be combined with a retroauricular access and thus covers a larger range of indications. The indications must be strictly followed, analogous to conventional surgery. Once the transoral access has been established, the operation is carried out as in open surgery but strictly from cranial to caudal. The classical complications are comparable to the results of conventional surgery. Specific complications include perioral, mandibular or cervical dysesthesia and hypesthesia.

Redo Thyroidectomy: Updated Insights

The risk of post-operatory hypothyroidism and hypocalcaemia, along with recurrent laryngeal nerve injury, is lower following a less-than-total thyroidectomy; however, a previously unsuspected carcinoma or a disease progression might be detected after initial surgery, hence indicating re-intervention as mandatory (so-called "redo" surgery) with completion. This decision takes into consideration a multidisciplinary approach, but the surgical technique and the actual approach is entirely based on the skills and availability of the surgical team according to the standard protocols regarding a personalised decision. We aimed to introduce a review of the most recently published data, with respect to redo thyroid surgery. For the basis of the discussion, a novel vignette on point was introduced. This was a narrative review. We searched English-language papers according to the key search terms in different combinations such as "redo" and "thyroid", alternatively "thyroidectomy" and "thyroid surgery", across the PubMed database. Inclusion criteria were original articles. The timeframe of publication was between 1 January 2020 and 20 July 2024. Exclusion criteria were non-English papers, reviews, non-human studies, case reports or case series, exclusive data on parathyroid surgery, and cell line experiments. We identified ten studies across the five-year most recent window of PubMed searches that showed a heterogeneous spectrum of complications and applications of different surgeries with respect to redo interventions during thyroid removal (e.g., recurrent laryngeal nerve monitoring during surgery, other types of incision than cervicotomy, the use of parathyroid fluorescence, bleeding risk, etc.). Most studies addressing novel surgical perspectives focused on robotic-assisted re-intervention, and an expansion of this kind of studies is expected. Further studies and multifactorial models of assessment and risk prediction are necessary to decide, assess, and recommend redo interventions and the most adequate surgical techniques.

Intraoperative AI-assisted early prediction of parathyroid and ischemia alert in endoscopic thyroid surgery

BACKGROUND

The preservation of parathyroid glands is crucial in endoscopic thyroid surgery to prevent hypocalcemia and related complications. However, current methods for identifying and protecting these glands have limitations. We propose a novel technique that has the potential to improve the safety and efficacy of endoscopic thyroid surgery.

PURPOSE

Our study aims to develop a deep learning model called PTAIR 2.0 (Parathyroid gland Artificial Intelligence Recognition) to enhance parathyroid gland recognition during endoscopic thyroidectomy. We compare its performance against traditional surgeon-based identification methods.

MATERIALS AND METHODS

Parathyroid tissues were annotated in 32 428 images extracted from 838 endoscopic thyroidectomy videos, forming the internal training cohort. An external validation cohort comprised 54 full-length videos. Six candidate algorithms were evaluated to select the optimal one. We assessed the model's performance in terms of initial recognition time, identification duration, and recognition rate and compared it with the performance of surgeons.

RESULTS

Utilizing the YOLOX algorithm, we developed PTAIR 2.0, which demonstrated superior performance with an AP50 score of 92.1%. The YOLOX algorithm achieved a frame rate of 25.14 Hz, meeting real-time requirements. In the internal training cohort, PTAIR 2.0 achieved AP50 values of 94.1%, 98.9%, and 92.1% for parathyroid gland early prediction, identification, and ischemia alert, respectively. Additionally, in the external validation cohort, PTAIR outperformed both junior and senior surgeons in identifying and tracking parathyroid glands (p < 0.001).

CONCLUSION

The AI-driven PTAIR 2.0 model significantly outperforms both senior and junior surgeons in parathyroid gland identification and ischemia alert during endoscopic thyroid surgery, offering potential for enhanced surgical precision and patient outcomes.

A prospective study to assess cervical scar satisfaction following conventional open thyroidectomy for thyroid cancer

BACKGROUND

Conventional open thyroidectomy (COT) remains a common method of thyroidectomy in many parts of the world for various reasons.

METHODS

In this prospective (cross-sectional) study, we evaluated the scar satisfaction among patients and surgeons following COT using the Patient and Observer Scar Assessment Scale (POSAS) and the Patient Scar Assessment Questionnaire (PSAQ).

RESULTS

A total of 116 patients were included. The median age of the patients was 44 years and the majority were women. The median scar length overall was 12.2 cm. On POSAS, the median score for surgeon 1 was 1 (range 1-5), for surgeon 2, it was 2 (range 1-6), and for the patient, it was 1 (range 1-6) suggesting good scar satisfaction. The patient's response in the PSAQ was also echoing similar outcomes with scar satisfaction.

CONCLUSIONS

Overall, both the patients and the surgeons seem to be satisfied with the overall scar appearance following COT despite the scar length.

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.

Current and Future of Robotic Surgery in Thyroid Cancer Treatment

Thyroid cancer is among the most common endocrine malignancies, necessitating effective surgical interventions. Traditional open cervicotomy has long been the standard approach for thyroidectomy. However, the advent of robotic surgery has introduced new possibilities for minimally invasive procedures with benefits in terms of cosmetic outcomes, enhanced precision, comparable complication rates, and reduced recovery time. This study mainly reviewed the most widely used and well-known robotic thyroidectomy approaches: the transaxillary approach, the bilateral axillo-breast approach, and the transoral approach. This review examines the current status and future potential of robotic surgery in thyroid cancer treatment, comparing its efficacy, safety, and outcomes with those of conventional open cervicotomy. Challenges such as a longer operative time and higher costs exist. Future directions include technological advancements, tele-surgery, single-port surgery, and the integration of artificial intelligence. Robotic surgery holds promise in optimizing patient outcomes in thyroid cancer treatment.

Application of Carbon Nanoparticles in Transoral Endoscopic Thyroidectomy Vestibular Approach for Unilateral Papillary Thyroid Cancer

BACKGROUND

Transoral endoscopic thyroidectomy vestibular approach (TOETVA) is newly applied technology. Carbon nanoparticles (CNs) are novel lymph node tracers that have been widely used in China to help remove central lymph nodes (CLNs) and protect the parathyroid glands (PGs) in open thyroid cancer surgery. This study is to evaluate the effectiveness and safety of CNs in TOETVA.

MATERIALS AND METHODS

A total of 158 patients who underwent TOETVA with unilateral papillary thyroid carcinoma were enrolled in this study from March 2019 to February 2022. The participants were divided into a CNs group (n=88) and a control group (n=70), based on whether they received a intraoperative injection of CNs or not. Meanwhile, the CNs group were additionally divided into 2 subgroups, leakage subgroup (n=26) and standard subgroup (n=62). The 2 groups and subgroups were compared in terms of patient characteristics, perioperative clinical results, and postoperative outcomes.

RESULTS

All common metrics had no significant differences were found between the CNs group and the control group ( P >0.05). The standard subgroup of CNs group had advantage over the control group on PGs identification (59/62 vs. 59/70 for superior PG, 56/62 vs. 52/70 for inferior PG, P <0.05). Moreover, the standard subgroup harvested more CLNs than the control group (8.97±2.96 vs. 7.47±2.93, P <0.05). More operation time was spent on the leakage subgroup of CNs group than the control group (160.00±17.61 vs. 140.00±13.32, P <0.05). Meanwhile, the leakage subgroup had disadvantage on intraoperative hemorrhage (26.15±10.80 vs. 21.21±7.09, P <0.05) and hospital durations (4.96±0.72 vs. 4.57±0.69, P <0.05). Furthermore, the leakage group identified fewer inferior PG than the control group (7/26 vs. 52/70, P <0.05). Contrary to the standard subgroup, the CLNs of the leakage subgroup was also unsatisfactory compared with the control group (4.96±1.84 vs. 7.47±2.93, P <0.05).

CONCLUSIONS

The application of CNs suspension tracing technology has a definite effect in TOETVA. It can improve the thoroughness of lymph node dissection in the central region and enhance recognition of the PG. However, refined extracapsular anatomy is indispensable to prevent CN leakage. Leaked CNs will also be counterproductive to the operation.

No Change in Complications Following Thyroidectomy Despite Increase in Thyroid Cancer Surgeries: A Meta-Regression Analysis

PURPOSE

The increase in thyroid cancer incidence has inevitably led to an increase in thyroid cancer surgeries. This meta-regression analysis aimed to determine if the rate of post-thyroidectomy complications changes by year.

MATERIALS AND METHODS

PubMed and Embase databases were used to perform a systematic literature search of studies published from January 1, 2005, using the keywords "thyroidectomy" and "complication." A meta-regression was performed for post-thyroidectomy hypocalcemia and bleeding.

RESULTS

This meta-analysis included 25 studies involving 927751 individuals. Through the years of publications in this study, there was no significant difference in the proportion of post-thyroidectomy hypocalcemia and bleeding (p=0.9978, 0.6393).

CONCLUSION

Although the number of thyroid surgeries has recently increased, the incidence of post-thyroidectomy hypocalcemia and bleeding did not significantly increase.

Surgical outcomes of robotic thyroidectomy for thyroid tumors over 4 cm via the bilateral axillo-breast approach

The study investigated the feasibility of robotic bilateral axillo-breast approach (BABA) thyroidectomy for patients with thyroid tumors larger than 4 cm. BABA thyroidectomy has previously shown safety and effectiveness for thyroid surgeries but lacked extensive data on its application to larger tumors. Between October 2008 and August 2022, there were 74 patients underwent robotic BABA thyroidectomy due to thyroid nodules exceeding 4 cm in size. The mean patient age was 40.3 years. Fine needle aspiration results classified the tumors as benign (50.0%), atypia of undetermined significance (27.0%), follicular neoplasm (16.2%), suspicious for malignancy/malignancy (5.4%), or lymphoma (1.4%). The average tumor size was 4.9 cm, with the majority (85.1%) undergoing thyroid lobectomy, and the rest (14.9%) receiving total thyroidectomy. The mean total operation time was 178.4 min for lobectomy and 207.3 min for total thyroidectomy. Transient vocal cord palsy (VCP) was found in 3 patients (4.1%), and there was no permanent VCP. Among patients who underwent total thyroidectomy, transient hypoparathyroidism was observed in three (27.2%), and permanent hypoparathyroidism was observed in one (9.1%). There were no cases of open conversion, tumor spillage, bleeding, flap injury, or tumor recurrence. In conclusion, robotic BABA thyroidectomy may be a safe treatment option for large-sized thyroid tumors that carries no significant increase in complication rates.

Bibliometric analysis of research trends and hotspots on robot-assisted thyroid surgery

BACKGROUND

Thyroid surgery involves the partial or complete removal of the thyroid gland and is a frequently performed surgical procedure. The adoption of robots, equipped with flexible and stable operating systems, has garnered acceptance among numerous surgeons for their capability to enable precise anatomical dissection in thyroid surgery. To gain a comprehensive insight into the present research landscape of robot-assisted thyroid surgery, this paper endeavored to conduct a thorough analysis of the field through bibliometric analysis.

METHODS

Relevant literature pertaining to robot-assisted thyroid surgery was retrieved from the Web of Science Core Collection (WOSCC) database, spanning from the inception of WOSCC to October 17, 2022. Visual analyses of publication quantity, distribution across countries/regions, institutions/organizations, authorship, journals, references, and keywords were conducted using Microsoft Excel, the bibliometrix package in R, Citescape, and VOSviewer software.

RESULTS

A total of 505 articles from 406 institutions in 36 countries/regions were included. South Korea emerged with highest number of publications. Notably, Professor CHUNG WY from Yonsei University in South Korea and the journal "Surg Endosc" stood out with the most publications. The current research landscape indicated significant interest in endoscopic thyroidectomy, surgical procedures, and the axillary approach. In addition, transoral robotic thyroidectomy (TROT), and learning curve (LC) were recognized as research frontiers, representing potential future hotspots in this field.

CONCLUSION

This study marks the first bibliometric analysis of the literature on robot-assisted thyroid surgery. The results highlight endoscopic thyroidectomy, surgical procedures, and the axillary approach as current research hotspots, with TROT and LC identified as potential future research hotspots.

Mini-invasive video-assisted thyroidectomy vs robot-assisted transaxillary thryoidectomy: analisys and comparison of safety and outcomes

Thyroid surgery is characterized by large volumes and typically affects a young female population. Mini-invasive or remote access surgical techniques are born driven by the desire to improve aesthetic outcomes of the traditional technique, following technological advances that have upset the surgical world in the last 20 years. In our multicenter, retrospective observational study, we first compared an endoscopic technique with a robotic one: minimally invasive video-assisted thyroidectomy (MIVAT) and robot-assisted transaxillary thyroidectomy (RATT). We evaluated intraoperative features, complications, and cosmetic outcomes in a cohort of 609 patients. The efficacy and safety of these techniques are proven by a large literature and the comparison made in our study does not show inferiority of one technique compared to the other. Even the aesthetic results tend to be equal in the long term. It is desirable that further prospective and randomized studies are conducted to evaluate the outcomes of these procedures and the cost-benefit ratio.

Status of mental and social activities of young and middle-aged patients after papillary thyroid cancer surgery

Background

Papillary thyroid cancer (PTC) is prevalent among younger populations and has a favorable survival rate. However, a significant number of patients experience psychosocial stress and a reduced quality of life (QoL) after surgical treatment. Therefore, comprehensive evaluations of the patients are essential to improve their recovery.

Methods

The present study enrolled 512 young and middle-aged patients diagnosed with PTC who underwent surgery at our institution between September 2020 and August 2021. Each participant completed a series of questionnaires: Generalized Anxiety Disorder 7 (GAD-7), European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ-C30), Thyroid Cancer-Specific Quality of Life Questionnaire (THYCA-QoL), and Readiness to Return-to-Work Scale (RRTW).

Results

GAD-7 data showed that almost half of the study subjects were experiencing anxiety. Regarding health-related quality of life (HRQoL), participants reported the highest levels of fatigue, insomnia, voice problems, and scarring, with patients in anxious states reporting worse symptoms. Based on RRTW, more than half of the subjects had returned to work and had better HRQoL compared to the others who were evaluating a possible return to work. Age, gender, BMI, education, diet, residence, health insurance, months since surgery, monthly income, and caregiver status were significantly correlated with return to work. Additionally, having a caregiver, higher monthly income, more time since surgery, and living in a city or village were positively associated with return to work.

Conclusion

Young and middle-aged patients with PTC commonly experience a range of health-related issues and disease-specific symptoms following surgery, accompanied by inferior psychological well-being, HRQoL, and work readiness. It is crucial to prioritize timely interventions targeting postoperative psychological support, HRQoL improvement, and the restoration of working ability in PTC patients.

Gasless robot-assisted transaxillary hemithyroidectomy (RATH): learning curve and complications

PURPOSE

Gasless robot-assisted transaxillary hemithyroidectomy (RATH) is regarded as an alternative surgical option for thyroid operations. However, the associated steep learning curve is a clinical concern. This study evaluated the learning curve of RATH for surgeons without experience of endoscopic surgery and the early surgical outcomes of RATH.

METHODS

We conducted a retrospective study of patients who underwent gasless RATH and conventional hemithyroidectomy (CH) at Sun Yat-sen University Cancer Center, Guangzhou, China, from June 2021 to August 2022. The learning curve and early surgical outcomes of gasless RATH were evaluated. And the early surgical outcomes of gasless RATH were compared to CH.

RESULTS

In total, 105 patients who underwent gasless RATH and 104 patients who underwent CH were matched and assessed. The cumulative sum techniques (CUSUM) analysis showed that the peak point of gasless RATH operative time occurred at the 31st case. No clear single peak was identified in the CUSUM plot for drainage amount and blood loss. No significant difference in perioperative complications was observed between these two groups. Moreover, the number of postoperative patients who got sense of thyroid area traction were fewer in the gasless RATH group (n = 11, 10.5%) than in the CH group (n = 32, 30.8%).

CONCLUSION

Gasless RATH can be considered as an alternative approach to the conventional open procedure, as it is an easy remote access technique, with shorter learning curves and certain advantage such as less sense of thyroid area traction.

A Comparison Between the Transoral Endoscopic Thyroidectomy Vestibular Approach and the Transareolar Approach Regarding Perioperative Complications: A Systematic Review and Meta-Analysis

The global adoption of remote thyroidectomy is increasing, with the transoral endoscopic thyroidectomy vestibular approach (TOETVA) and transareolar approach (TAA) emerging as predominant methods. However, existing meta-analyses comparing these approaches to operative surgeries and short-term postoperative complications have significant limitations. To address this gap, our meta-analysis provides a comprehensive comparison between the TOETVA and TAA, focusing on operation time, intraoperative blood loss, postoperative drainage, and hospital stay duration. It aims to offer robust insights into their relative efficacy and safety profiles. We searched SCOPUS, PubMed, Web of Science, MEDLINE, and Cochrane Library from June 2015 to January 2024 for studies comparing transoral endoscopic thyroidectomy with the vestibular approach and areolar thyroidectomy using keywords, including "transoral thyroidectomy" and "scarless thyroidectomy." Studies were included if they were randomized controlled trials, case-control studies, or prospective/retrospective cohort studies comparing the TOETVA and TAA. Exclusion criteria removed case series, cross-sectional studies, editorials, non-English language, animal studies, and irrelevant articles. Data on operative time, postoperative drainage, intraoperative blood loss, and hospital stay were extracted. The Newcastle-Ottawa Scale was used to assess study quality (all studies scored 7-8). The findings revealed that the operative time was longer among the TOETVA group, with less intraoperative blood loss (odds ratio (OR) = 13.31, 95% confidence interval (CI) = 4.44-22.19); OR = -1.61, 95% CI = -2.82 to -0.39, respectively). Regarding hospitalization duration and postoperative drainage, no discernible difference was observed between the endoscopic TAA (ETAA) and TOETVA (OR = -0.04, 95% CI = -0.24 to 0.16; OR = -6.74, 95% CI = -20.08 to 6.60, respectively). The TOETVA has advantages over the TAA in terms of intraoperative blood loss and shorter operation times. However, both approaches exhibited comparable outcomes in terms of hospital stay duration and postoperative drainage. Furthermore, extensive randomized trials are warranted.

Seeding recurrence of follicular thyroid carcinoma after transoral endoscopic thyroidectomy vestibular approach: a case report

Background

While track recurrence of thyroid cancer following endoscopic and robotic transaxillary surgeries has been reported previously, no such cases have been reported for transoral endoscopic thyroidectomy vestibular approach (TOETVA). This case report describes the first documented case of recurrence of thyroid cancer along the surgical track after TOETVA.

Case Description

The patient underwent right lobectomy via TOETVA for a 4 cm follicular thyroid carcinoma (FTC) initially diagnosed as benign follicular nodule on preoperative gun biopsy. The thyroid capsule partially ruptured within the surgical field during surgery. Ultrasonography and computed tomography conducted 27 months after surgery revealed seeding recurrence in the postsurgical thyroid bed, and subcutaneous layers of the right lower lip, submental area, and mid to right upper neck levels I, IIA, and VI. Two-stage re-operation was done to perform completion thyroidectomy, lymph node dissection, and excision of recurrent nodules, which were pathologically confirmed as metastatic FTC. The patient underwent two treatments of radioactive iodine therapy, and post-therapeutic whole-body scintigraphy and computed tomography showed no residual disease.

Conclusions

Careful monitoring after TOETVA is essential due to the rare but potential risk of seeding recurrence, especially when the thyroid gland ruptures during surgery. Surgeons should be aware of this atypical complication and be prepared to recommend surgical and/or medical strategies to manage any local seeding of thyroid tissue that may occur.

A modified, single-incision, gasless, endoscopic thyroidectomy and bilateral central neck dissection via axillary approach technique for bilateral papillary thyroid microcarcinoma: A preliminary report

Background

Our objective was to assess the viability and oncological security of a gasless, transaxillary single-incision endoscopic procedure for performing total thyroidectomy and bilateral central neck dissection (TT + BCND). This study focused on patients diagnosed with bilateral papillary thyroid microcarcinoma (PTMC).

Method

Between April 2020 and November 2021, 22 patients with bilateral PTMC underwent single-incision, gasless, transaxillary endoscopic TT + BCND. The patients' clinicopathologic characteristics, surgical completeness and complications were analyzed.

Result

Single-incision, gasless, transaxillary endoscopic TT + BCND was successful performed in all patients. The median (IQR) total surgical time was 143 (85-160) min. Only two patients experienced transient unilateral RLN palsy or transient hypocalcemia. All these complications resolved within 1 month after surgery. The median duration of hospital stay after surgery was 4 (3-4.5) days. The median hospitalization expense for these patients was 3848 (3781-4145) USD. The median number of lymph node yielded was 10.5 (8-15). The cosmetic outcomes were well-received by all individuals.

Conclusion

In certain cases, gasless, transaxillary endoscopic TT + BCND procedure performed through a single incision proved to be a secure alternative for managing bilateral PTMC.

Safety and surgical outcomes of single-port trans-axillary robot-assisted thyroidectomy: Experience from a consecutive series of 300 patients

Since the introduction of the single-port (SP) robotic system, SP trans-axillary robot-assisted thyroidectomy (SP-TART) has been performed. We aimed to evaluate the safety and surgical outcomes of SP-TART in a consecutive series of 300 cases. We analyzed 300 patients with thyroid disease who underwent SP-TART from October 2021 to May 2023 in St. Mary's Hospital in Seoul, Korea. We analyzed the patients' clinicopathological characteristics and perioperative outcomes according to surgical extent. Of the 300 cases analyzed, 250 patients underwent less than total thyroidectomy (LTT), 31 patients underwent total thyroidectomy (TT), and 19 patients underwent TT with modified radical neck dissection (TT c mRND). The mean operative times for LTT, TT, and for TT c mRND were 69.8 ± 23.6, 104.2 ± 30.7, and 223.7 ± 72.4 min, respectively. Complications, including postoperative bleeding, transient hypoparathyroidism, and vocal cord palsy, were observed in nine, six, and six LTT, TT, and TT c mRND cases. The SP-TART method is a safe and feasible surgical option with a short operative time, good surgical outcome, and excellent cosmetic results.

"Three-in-One Wonder": A Retrospective Cohort Study on Modified Robotic-Assisted Transoral Thyroidectomy

IMPORTANCE

With advancements in robotic surgery, robotic-assisted thyroidectomy is gaining popularity. The introduction of the 3-port transoral robotic thyroidectomy (T-TORT) offers an alternative approach with potential benefits in postoperative recovery compared to traditional methods.

OBJECTIVE

To assess the safety and feasibility of T-TORT in comparison to the transoral endoscopic thyroidectomy vestibular approach (TOETVA).

DESIGN

A retrospective cohort study with 1:1 propensity score matching was conducted to compare perioperative outcomes between T-TORT and TOETVA. The learning curve was analyzed using cumulative summation (CUSUM).

SETTING

Tertiary A hospital.

PARTICIPANTS

One hundred sixty-two patients who underwent either T-TORT or TOETVA were included.

INTERVENTION OR EXPOSURES

The T-TORT group underwent three-port robotic thyroidectomy, while the TOETVA group received standard transoral vestibular endoscopic thyroidectomy.

MAIN OUTCOMES AND MEASURES

Demographics and perioperative data were compared. The learning curve was evaluated using CUSUM.

RESULTS

Compared with the TOETVA group the operation time in minutes of the T-TORT group was relatively longer (136.14 ± 36.52 vs 122.49 ± 34.85, P = .012), the postoperative stay, in days, was shorter (2.77 ± 0.78 vs 3.51 ± 0.95, P < .001), the drainage volume on a postoperative day 1 (POD1) and POD2, in milliliter, was less (POD1 56.57 ± 23.29 vs 65.12 ± 26.04, P = .029 and POD2 27.43 ± 25.29 vs 38.21 ± 25.09, P = .008). The other statistics, including bleeding amount, retrieved and metastatic central lymph nodes, visual analog scale score, and drainage volume on an operative day were comparable between the 2 groups. Meanwhile, there were no significant differences between the 2 groups in postoperative complication rates. The turning point of the learning curve was in the 16th case with a hemithyroidectomy with central neck dissection (CND) and the 21st case with a bilateral thyroidectomy with CND.

CONCLUSIONS AND RELEVANCE

T-TORT is a safe and feasible option with enhanced postoperative recovery compared to TOETVA. It may be a preferable choice in specific clinical situations.

TRIAL REGISTRATION

This study was registered at the Chinese Clinical Trial Registry (UIN: ChiCTR2300069021, https://www.chictr.org.cn) in accordance with the World Medical Association's Declaration of Helsinki, 2013.

Defining the Thyroid-RLN Entry Triangle for Enhanced Recurrent Laryngeal Nerve Exposure in TOETVA: A Retrospective Study

BACKGROUND

Injury to the recurrent laryngeal nerve (RLN) and parathyroid glands (PGs) are the most common and serious complications during the transoral endoscopic thyroidectomy vestibular approach (TOETVA), and their exposure and protection are the most important factors affecting the operation time. Here, we report a novel anatomical landmark and surgical method to shorten the operative time and reduce the chance of injury to the RLN and PGs.

METHODS

According to the different exposure methods of the RLN, patients were divided into the experimental group (from top to bottom, E-group) and the comparison group (from outside to inside, C-group), and 1:1 propensity score-matching (PSM) was performed. The demographics, operative data, postoperative data, and postoperative complications were analyzed by comparing the 2 groups.

RESULTS

After PSM, a total of 206 patients were included. Except for tumor size, there were no significant differences between the 2 groups in terms of sex, age, body mass index, presence of Hashimoto's thyroiditis, or extent of surgery. Compared with the C-group, the operative time, in minutes, of the E-group was significantly shorter (hemithyroidectomy with central neck dissection (CND), C = 111.81 ± 25.83 vs E = 100.52 ± 16.47, P = .002 and bilateral thyroidectomy with CND, C = 177.87 ± 36.61 vs E = 156.05 ± 25.60, P = .004), the exposure time, in minutes, of the RLN was reduced (hemithyroidectomy with CND, C = 23.31 ± 7.07 vs E = 11.41 ± 2.75, P < .001 and bilateral thyroidectomy with CND, C = 45.64 ± 14.84 vs E = 21.76 ± 5.57, P < .001). The rate of postoperative temporary PGs and RLN injuries were also reduced (transient hypoparathyroidism, C = 13% vs E = 4%, P = .023 and transient RLN palsy, C = 10% vs E = 2%, P = .017). In addition, the remaining parameters such as the amount of bleeding, number of lymph node metastases, postoperative hospital stay, visual analog scale pain score, recurrence rate, and other complication rates were not significantly different between the 2 groups.

CONCLUSION

It is safe and feasible to construct Thyroid-RLN Entry Triangle (Peng's Triangle) for PGs and RLN protection in TOETVA. It is beneficial to shorten the operation time and reduce postoperative complications, both worthy of clinical promotion.

TRIAL REGISTRATION

This study was registered at the Chinese Clinical Trial Registry (UIN: ChiCTR2300067673, https://www.chictr.org.cn) in accordance with the World Medical Association's Declaration of Helsinki, 2013.

Endoscopic thyroidectomy using the axillo-breast approach in patients with lactating and/or large ptotic breasts

INTRODUCTION

The purpose of this study is to evaluate the outcomes of endoscopic hemithyroidectomy (EH) performed via the modified unilateral axillo-breast approach (UABA) in patients with lactating and/or large ptotic breasts.

METHODS

Between 2019 and 2021, we studied the records of twenty-three eligible female patients with lactating and/or large ptotic breasts who were presented with benign unilateral thyroid nodule (s) and who were treated by EH using modified UABA at Mansoura University Oncology Center or Meet Ghamr oncology center. The demographic data, clinicopathological parameters, operative and the esthetic outcomes were collected and analyzed.

RESULTS

Nine patients (39%) were lactating. All patients were obese (the mean BMI was 37.82 ± 4.37). All patients were having large breasts, cup C and D sizes (34% of patients & 56% of patients respectively), except for only two lactating female patients who had Cup B breasts. All patients were having ptotic breasts. The thyroid nodules greatest dimension ranged from 2.1-6 cm. All procedures were completed successfully endoscopically without any perioperative adverse events except for one case with temporary hoarseness of voice and three cases with axillary port sites cellulitis. The mean operative time was 83.26 ± 7.92 min. The patient satisfaction scores were high.

CONCLUSION

EH via modified UABA in patients with lactating and/or large ptotic breasts is safe, feasible and effective procedure without adverse events. It should be offered to this group of patients as an alternative to conventional open thyroidectomy if there is no other contraindication.

[Complications and technical aspects of safe tissue dissection in endoscopic hemithyroidectomy]

OBJECTIVE

To analyze the complications following endoscopic hemithyroidectomy and to develop the principles of tissue dissection for safe surgical intervention.

MATERIAL AND METHODS

The results of surgical treatment of 136 patients were studied. The main group consisted of 44 patients who underwent endoscopic hemithyroidectomy through a «gasless» axillary approach (EH group). The first control group consisted of 45 patients who underwent minimally invasive video-assisted hemithyroidectomy (MIVAH group). The second control group consisted of 47 patients who underwent open hemithyroidectomy (OH group).

RESULTS. O

Verall complication rate was significantly higher in the EH group (20.5% vs. 6.4% in the OH group and 4.4% in the MIVAH group; p<0.05). In the EH group, Clavien-Dindo grade I complications occurred in 11.4% of cases. There were no similar complications in the control groups (p<0.05). Clavien-Dindo grade II complications occurred in 9.1% of patients in the EH group, 4.3% in the OH group and no similar events were identified in the MIVAH group (p>0.05). Clavien-Dindo grade III complications occurred in 1 (2.1%) case in the OH group and 2 (4.4%) cases in the MIVAH group. There were no Clavien-Dindo grade III complications in the EH group. Thus, minor complications prevailed in the EH group. Their incidence decreased along with accumulation of experience. Moreover, endoscopic procedure is safer regarding the risk of severe complications.

CONCLUSION

Endoscopic hemithyroidectomy is safe, and the proposed principles of tissue dissection can further increase surgical safety.

Comparison of transoral endoscopic thyroidectomy vestibular approach and open conventional thyroidectomy regardıng inflammatory responses, pain, and patient satisfaction: a prospective study

Introduction

The application of transoral endoscopic thyroidectomy vestibular approach (TOETVA) is becoming widespread throughout the world. We primarily aimed to evaluate the severity of surgical trauma in TOETVA and conventional open thyroidectomy (COT) regarding the inflammatory response including the comparison of surgical stress markers [interleukin-6 (IL-6), C-reactive protein (CRP), white blood cell (WBC)].

Material and method

This non-randomized prospective study enrolled two groups with 20 patients each: COT group and TOETVA group. Patients aged 18-65 years with benign thyroid disease; with fine needle aspiration biopsy results of Bethesda III, IV or Bethesda V, VI (<1 cm nodule); thyroid volume <50 cm3; nodule diameter <4 cm; female gender without a previous neck, chin, and/or oral surgery; without vocal cord paralysis preoperatively; and patients in euthyroid state were enrolled to the study. Preoperative, postoperative second hour, first day, and second day CRP, WBC, and IL-6 levels were evaluated. Pain intensity was evaluated with the visual analog scale (VAS) score on the 2nd and 12th hour, 1st and 2nd days postoperatively.

Results

All the patients were female and mean age was significantly higher in the COT group. The operative time was significantly longer in the TOETVA group. No significant difference was found between the two groups regarding IL-6 levels. In the TOETVA group, postoperative second hour WBC value (p = 0.044) and first (p = 0.002) and second day (p = 0.005) CRP values were significantly higher. In the TOETVA group, the lower lip and lower chin VAS scores were significantly higher at 2nd and 12th hour, on the first and second days. The anterior neck VAS score was significantly higher in the TOETVA group at the second hour (p = 0.025). General and cosmetic satisfactions were similar at the 15th and 30th days in both groups.

Conclusion

The longer operative time and higher postoperative CRP level and VAS score in the chin and lower lip in the TOETVA group suggested that the method is not a minimally invasive technique compared to COT. However, the presence of similar total complication rates and early postoperative general and esthetic satisfaction that improves over time in both groups suggests that the clinical effect of increased magnitude of systemic inflammatory response in TOETVA might be temporary and acceptable.

Robotic thyroidectomy using gas-insufflation one-step single-port transaxillary (GOSTA) approach

BACKGROUND

We conducted this study to report our novel robotic thyroidectomy using gas-insufflation one-step single-port transaxillary (GOSTA) approach and compare it with a conventional transaxillary (CTA) approach using a retraction method for intraoperative and postoperative outcomes.

METHODS

We retrospectively analyzed 354 patients who underwent robotic thyroidectomy between January 2019 and April 2023. Of these patients, 143 underwent the procedure through the GOSTA approach, which involves a small incision of 3 cm along the axillary folds with both arms down and a gas-insufflation, from skin flap creation to the completion of thyroidectomy as a one-step single-port procedure without the need for a retractor. The remaining 211 patients underwent the CTA approach. We analyzed the GOSTA approach and compared the surgical outcomes of the GOSTA (n = 100) and CTA (n = 167) approaches in patients with differentiated thyroid cancer who underwent thyroid lobectomy.

RESULTS

Out of the 143 patients who underwent the GOSTA approach, 12 underwent total thyroidectomy and 9 underwent lateral neck lymph node dissection with total thyroidectomy. GOSTA-thyroid lobectomy was performed on 122 patients; of these, 100 were diagnosed with differentiated thyroid carcinoma. A comparative study with the CTA approach was only conducted in patients who underwent thyroid lobectomy. No significant differences were found in operative time, hospital stay, or complications between the two groups.

CONCLUSIONS

Despite proceeding in one-step with a single smaller incision, from skin flap creation to the completion of thyroidectomy, the GOSTA approach is as feasible and safe as the CTA approach. Additionally, the GOSTA approach allows for thyroidectomy without using a retractor and reduces the workload for the surgeon and assistants.

Transoral and submental endoscopic thyroidectomy (TOaST) for early stage papillary thyroid carcinoma: a real-world data retrospective cohort study

INTRODUCTION

Although transoral endoscopic thyroidectomy (TOETVA) is widely utilized in clinical practice, some problems and restrictions still remain. Our study compared the perioperative features and early surgical efficacy of TOETVA and a modified transoral and submental endoscopic thyroidectomy (TOaST) in early stage papillary thyroid carcinoma (PTC).

METHODS

The clinical data of PTC patients who underwent endoscopic thyroidectomy, including 42 modified TOaST patients and 114 traditional TOETVA patients, were retrospectively collected. Propensity score matching was employed to reduce patient selection bias. The perioperative features and early surgical efficacy data of two groups were compared.

RESULTS

The operation time of the TOaST group was significantly shorter than that of the TOETVA group (150.00 ± 35.47 min vs. 168.75 ± 44.49 min; P = 0.030). Furthermore, the TOaST group required shorter days for a normal diet (3.38 ± 0.93 days vs. 4.04 ± 1.03 days; P = 0.000) and a shorter hospital stay than the TOETVA group (5.85 ± 2.17 days vs. 6.12 ± 2.01 days; P = 0.003). There was no statistical difference in complications between the two groups, but the probability of numbness of the lower lip and chin in the TOaST group was lower than that in the TOETVA group(5.12% vs. 13.04%, P = 0.321). The symptoms of mandibular numbness and hoarseness of most patients were relieved in both groups 6 months after surgery, and no abnormalities and recurrence were found in the thyroid ultrasound. All the patients were satisfied with the appearance of their surgical incision.

CONCLUSION

In early stage PTC patients, TOaST had the same surgical effectiveness as traditional TOETVA but can minimize the probability of mandibular numbness and improve the perioperative quality of life.

Diagnosis and treatment of HS after endoscopic thyroid surgery: case report and brief literature review

Background

Horner's syndrome (HS) is a rare condition due to damage to the 3-neuron sympathetic pathway anywhere between the posterior-lateral nuclei of the hypothalamus and the oculosympathetic fiber, particularly as a post-thyroidectomy symptom. In this case report, we present a case of HS following endoscopic thyroid surgery (ETS) and briefly review the literature.

Case report

During a routine physical examination, a 29-year-old female patient was incidentally found to have multiple nodules in the right thyroid. She was subsequently admitted to the Department of General Surgery for further examinations and treatment. A fine-needle aspiration biopsy confirmed malignancy in these nodules. As a result, the patient underwent radical resection of the right thyroid and ipsilateral central lymph node dissection using endoscopy. Pathological diagnosis revealed papillary thyroid carcinoma. Unexpectedly, on the third day after the operation, the patient was diagnosed with Horner's syndrome based on the presence of miosis and ptosis. After 1 week of follow-up, the symptoms related to HS significantly improved.

Conclusion

Horner's syndrome is an uncommon complication of thyroidectomy in patients undergoing ETS. Therefore, it is crucial to perform careful operations and minimize iatrogenic surgical damage to reduce the incidence of HS. This case serves as a reminder that making rational judgments and implementing appropriate measures are essential for achieving a favorable prognosis and preserving facial esthetics.

Is transoral endoscopic thyroidectomy safe for total thyroidectomy compared to open thyroidectomy? A propensity-score matched cohort study with papillary thyroid carcinoma

BACKGROUND

Transoral endoscopic thyroidectomy via vestibular approach (TOETVA) has become increasingly popular in the treatment of papillary thyroid cancer (PTC). This study aimed to describe the safety and feasibility of total thyroidectomy between the TOETVA and open thyroidectomy (OT) approaches for the treatment of patients with PTC.

METHODS

We retrospectively reviewed 780 consecutive patients suffering from PTC that had undergone total thyroidectomy using TOETVA (n = 107) and OT (n = 673) between April 2016 and December 2021 at our institute. Afterward, a total of 101 matched patients' surgical outcomes were compared using propensity score matching (PSM) analysis.

RESULTS

Before PSM, the patients in the TOETVA group were younger (p < 0.001), had a lower body mass index (p < 0.001) and a greater female population (p < 0.001). After PSM, the TOETVA group was associated with significantly longer operative time (p < 0.001), greater blood loss (p < 0.001), total drainage amount (p < 0.001), higher C-reaction protein level (p < 0.001), better cosmetic satisfaction (p < 0.001) and quality of life (p < 0.001) and lower scar self-consciousness (p < 0.001). There was no statistical difference between the groups in the rate of parathyroid autotransplantation and bilateral lymph node dissection, the positivity of lymph node metastasis, number of dissected lymph nodes and positive lymph nodes, multifocality, postoperative level of blood calcium and parathyroid hormone (PTH), rate of PTH < 15 ng/mL, visual analog scale score, duration of hospital stay, complications, mean thyroid stimulating hormone (TSH)-stimulated Tg level before radioactive iodine, mean Tg level without TSH stimulation, and the proportion of serum Tg level of <1.

CONCLUSION

TOETVA is a safe and feasible technique for better cosmetic effects and similar surgical outcomes compared to conventional open surgery for the studied patients that required total thyroidectomy.

Global trends in research of endoscopic thyroidectomy from 2013 to 2022: a scientometric and visualization analysis

Introduction

Recently, endoscopic thyroidectomy has been developed and applied to thyroid surgery to achieve minimized neck scar formation and enhanced aesthetic outcomes. Our scientometric research in this paper offers a thorough overview of endoscopic thyroidectomy from 2013 to 2022.

Methods

All pertinent articles on endoscopic thyroidectomy were obtained from the Web of Science Core Collection Database. The data on the number of citations and publications, most prolific countries and institutions, significant authors and journals, top themes, and keywords were analyzed by Biblioshiny, CiteSpace, and VOSviewer.

Results

There were 758 publications, all of that were found from 2013 to 2022. The output of the annual publication showed an upward trend. A series of cases report by Anuwong et al. published in 2016 received the most citations. The country with the most articles published articles was South Korea, and the two countries with the most collaboration were South Korea and the United States. The most productive journal was Surgical Endoscopy and Other Interventional Techniques. Dionigi G, Kim HY, and Anuwong A were the writers with the most articles published, the highest h- and g-indices, and the strongest link strength, respectively. The keywords "endoscopic thyroidectomy", "surgical", "thyroidectomy", "robotic thyroidectomy", "experience", and others were most used.

Conclusion

The innovative surgical technique, transoral endoscopic thyroidectomy vestibular approach (TOETVA), leaves no scars and produces optimal cosmetic results. However, the long-term oncologic results for thyroid cancer performed with this approach are still missing. This scientometric analysis can offer valuable insights into the present research standing and key focal points in this domain, enabling researchers to gain a precise understanding of the state-of-the-art research in this area.

Transoral Endoscopic Thyroidectomy Vestibular Approach Versus Gasless Transaxillary Endoscopic Thyroidectomy for Patients With Unilateral Papillary Thyroid Carcinoma: A Retrospective Study

BACKGROUND

Transoral endoscopic thyroidectomy vestibular approach (TOETVA) and gasless transaxillary endoscopic thyroidectomy (GTET) are 2 newly applied technologies. This study is to compare the 2 approaches from the aspects of effectiveness and safety.

MATERIALS AND METHODS

A total of 339 patients who underwent TOETVA or GTET with unilateral papillary thyroid carcinoma were enrolled in this study from March 2019 to February 2022. The 2 groups were compared in terms of patient characteristics, perioperative clinical results, and postoperative outcomes.

RESULTS

The operative time of the TOETVA group was significantly longer than the GTET group (141.39±16.11 vs. 98.45±12.24, P <0.05). The TOETVA group had advantages over GTET group when the reduction of parathyroid hormone was compared (19.18±17.43 vs. 23.07±15.72, P <0.05). Meanwhile, more parathyroids were detected in central neck specimens in GTET group (40/181 vs. 21/158, P <0.05). TOETVA had an advantage on total number of central lymph nodes over GTET (7.65±3.11 vs. 4.99±2.45, P <0.05), whereas the number of positive central lymph nodes was similar ( P >0.05). No differences were found between the 2 groups on other data.

CONCLUSIONS

TOETVA and GTET are both safe and effective for unilateral papillary thyroid carcinomas. TOETVA has advantage on protection of inferior parathyroid glands and harvest of central lymph node dissection. Meanwhile, GTET can save more time compared with TOETVA. Surgeons and patients should freely choose the approaches based on their demands.

Surgical completeness and safety of minimally invasive thyroidectomy in patients with thyroid cancer: A network meta-analysis

BACKGROUND

To assess the surgical outcomes of various minimally invasive and remote-access surgical approaches for thyroid cancer patients.

METHODS

We collected studies from January 2020 to July 2022 in 6 databases. Pairwise and network meta-analyses were performed for outcomes and complications of 9 minimally invasive interventions (minimally invasive video-assisted, endoscopic or robotic bilateral axillo-breast approach, endoscopic or robotic postauricular, endoscopic or robot transaxillary approach, transoral endoscopic thyroidectomy vestibular approach or robotic thyroidectomy) and conventional thyroidectomy (control).

RESULTS

Multiplicity and bilaterality of cancer, lymph node metastasis, and coincidence of thyroiditis showed no significant difference between minimally invasive interventions and control. However, larger tumor size (robotic bilateral axillo-breast approach standardized mean difference -1.3989, 95% confidence interval [-2.1717 to -0.6262]), higher body mass index (robot transaxillary approach standardized mean difference -0.5350, 95% confidence interval [-0.9557 to -0.1144], robotic bilateral axillo-breast approach standardized mean difference -0.2301, 95% confidence interval [-0.4389 to -0.0214]), and frequent extrathyroidal extension (robotic bilateral axillo-breast approach standardized mean difference 0.7435, 95% confidence interval [0.5602-0.9869]) were observed in control. In surgical outcomes and adverse effects, there was no significant difference in hospitalization or retrieved lymph node number between minimally invasive interventions and control. However, longer operative time was observed in the robotic bilateral axillo-breast approach(standardized mean difference 6.5393, 95% confidence interval [5.0476-8.0309]) and transoral robotic thyroidectomy (standardized mean difference 5.4946, 95% confidence interval [2.9984-7.9907]) groups than in control. In surgical completion, the rate of low postoperative serum thyroglobulin, postoperative thyroglobulin level, and postoperative radioactive iodine ablation dose showed no significant difference between minimally invasive interventions and control.

CONCLUSION

Minimally invasive thyroidectomy did not show inferior results compared to conventional thyroidectomy despite the longer operative time. Surgeons need to prudently consider all aspects of patients to determine the proper surgical approach for thyroid cancer.

Comparison of surgical completeness in patients operated on conventional open total thyroidectomy (OT) or trans-axillary robot-assisted total thyroidectomy (RATT) by a single axillary approach

Trans-axillary robot-assisted total thyroidectomy (RATT) is nowadays worldwide accepted but the completeness obtained by RATT is still debated. The Aim of this study was to compare the completeness and safety of RATT with conventional open thyroidectomy (OT). We enrolled patients with nontoxic multinodular goiter, cytologically indeterminate nodules and well differentiated thyroid cancer without local and/or distant metastasis. In all cases the biggest nodule should be < 6 cm. The surgical completeness was evaluated by means of serum thyroglobulin (hs-Tg) and neck ultrasound (nUS) performed three months postoperatively. 100 patients underwent either RATT or OT. The type of surgical procedure was chosen by patients. They were then divided in two subgroups based on benign or malignant histology. There were no significant differences in the postoperatively values of hs-Tg in patients operated with RATT or OT, both in benign and malignant subgroups. The post-operative thyroid remnant volume estimated by nUS was not significantly different between the two groups, both in benign and malignant subgroups. We also analyzed the difference of the volume of the thyroid remnant ipsilateral to the axillary access vs that of the remnant on the contralateral side and there was not significantly difference in both subgroups. RATT was demonstrated to determine a comparable surgical completeness as OT, both in benign and malignant thyroid diseases, with no differences in the prevalence of surgical complications. In our hands the surgical completeness of RATT by a single trans-axillary was satisfying.

Recent Advances in the Surgical Management of Thyroid Cancer

A growing incidence of differentiated thyroid cancer (DTC) has been reported in most developed countries, corresponding mainly to incidentally discovered small papillary thyroid carcinomas. Given the excellent prognosis of most patients with DTC, optimal therapeutic management, minimizing complications, and preserving patient quality of life are essential. Thyroid surgery has a central role in both the diagnosis, staging, and treatment of patients with DTC. Thyroid surgery should be integrated into the global and multidisciplinary management of patients with DTC. However, the optimal surgical management of DTC patients is still controversial. In this review article, we discuss the recent advances and current debates in DTC surgery, including preoperative molecular testing, risk stratification, the extent of thyroid surgery, innovative surgical tools, and new surgical approaches.

Optimal primary wound closure methods after thyroid and parathyroid surgery: network meta-analysis of randomized clinical trials

BACKGROUND

At present, there is no consensus on optimal neck wound closure methods after thyroid and parathyroid surgery. The aim of this study was to perform a systematic review and network meta-analysis of RCTs evaluating the optimal neck closure method after thyroid and parathyroid surgery.

METHODS

A frequentist random-effects network meta-analysis was performed for RCTs comparing at least two closure methods according to PRISMA-network meta-analysis guidelines. Analysis was performed using R packages and Shiny.

RESULTS

Eighteen RCTs evaluating six closure methods (that is adhesive (28.5 per cent, 404 patients), absorbable subcuticular suture (18.1 per cent, 257 patients), non-absorbable subcuticular suture (16.8 per cent, 238 patients), staples (26.3 per cent, 372 patients), steristrips (8.1 per cent, 115 patients), and conventional suture (2.1 per cent, 30 patients)) in 1416 patients were included. At network meta-analysis, there was no difference in complication, infection, dehiscence, or haematoma rates irrespective of closure method used. Staples reduced closure duration versus absorbable subcuticular suture (mean difference (MD) 8.50, 95 per cent c.i. 6.90 to 10.10) and non-absorbable subcuticular suture (MD 0.30, 95 per cent c.i. 0.23 to 0.37), whereas adhesives (MD -1.05, 95 per cent c.i. -1.31 to -0.79) reduced closure time relative to staples. Cosmesis was improved after non-absorbable subcuticular suture (odds ratio (OR) 3.41, 95 per cent c.i. 1.66 to 7.00) relative to staples. Staples reduced patient satisfaction (OR 0.04, 95 per cent c.i. 0.00 to 0.33) and ability to shower (OR 0.04, 95 per cent c.i. 0.00 to 0.33) relative to adhesives.

CONCLUSION

Despite staples decreasing closure times, this advantage is offset by reduced patient satisfaction, ability to shower, and cosmesis compared with patients with wounds closed using adhesives, absorbable subcuticular suture, and non-absorbable subcuticular suture. Therefore, these closure methods are favourable for closing neck wounds due to more acceptable patient-reported outcomes, without compromising the safety of the procedure.

Analysis of scene-guided camera assistance in transaxillary gasless endoscopic thyroidectomy: a minor improvement in operative technique

Background

Transaxillary gasless endoscopic thyroidectomy (TGET) is a widely performed operation, but its side view angle and instrument interference have caused concerns for most surgical groups. The aim of this study was to introduce scene-guided camera assistance (SGA) and analyze its role in facilitating TGET.

Methods

We put forward key points for camera holders, including one pivot, two positions, and three planes, and separated TGET operations into five parts. We also established the view angle for each part of the operation for the camera holder to follow. Then, we reviewed 416 patients who underwent TGET with or without SGA and analyzed their demographic characteristics, operative outcomes, pathologic outcomes, and early complications.

Results

The TGET and TGET-SGA groups were similar in terms of age, sex ratio, height, weight, tumor size, Hashimoto's thyroiditis ratio, and cN1 ratio. The operation time and postoperative hospital stay were significantly longer in the TGET group than in the TGET-SGA group (114.43 ± 17.20 minutes vs. 101.82 ± 19.39 minutes and 3.16 ± 0.77 days vs. 2.16 ± 0.55 days, respectively, P < 0.001). The account of retrieved lymph nodes was less in the TGET group than in the TGET-SGA group (5.61 ± 4.27 vs. 6.57 ± 4.96, P = 0.038).

Conclusion

SGA provided guidance for camera holders, and the data showed that it was an improvement for TGET operations.

Comparison of surgical smoke between two approaches for endoscopic thyroidectomy and open thyroidectomy

BACKGROUND

Surgical smoke has been recognized as a potential health risk by an increasing number of researchers. Moreover, the counts of surgical smoke produced during different surgical approaches are different. This study aimed to measure and compare the particulate matter (PM) of surgical smoke generated during open thyroidectomy and two endoscopic approaches for thyroidectomy to provide guidance for safe clinical practices.

METHODS

Forty-eight patients with thyroid cancer admitted to our hospital from June 2020 to December 2021 and treated with different surgical approaches were enrolled in this study. The total and peak counts of PM, dynamic changes, and other characteristics of surgical smoke produced during surgery were recorded. PM was classified as PM2.5 (size ≤ 2.5 μm) and PM10 (size ≤ 10 μm).

RESULTS

In a single cut, both the peak and total counts of PM2.5 and PM10 of surgical smoke in the open thyroidectomy group (n = 15) were significantly higher than those in the breast approach endoscopic thyroidectomy with CO2 insufflation group (n = 15) and the gasless transaxillary endoscopic thyroidectomy group (n = 18) (p < 0.001). Moreover, the latter two groups showed no significant differences in the peak and total counts of PM2.5 and PM10 (p > 0.05).

CONCLUSION

In thyroid surgery, more surgical smoke is produced during open thyroidectomy than during endoscopic thyroidectomy, while different endoscopic approaches showed no significant difference in surgical smoke production. Thus, endoscopic approaches outperform the open thyroidectomy approach with regard to surgical smoke production.

Safety and Feasibility of Single-Port Trans-Axillary Robotic Thyroidectomy: Experience through Consecutive 100 Cases

Background and Objectives: Recently, the single-port (SP) robotic system was introduced for minimally invasive operative techniques. Thus, this study aimed to validate the safety and feasibility of SP trans-axillary robotic thyroidectomy (SP-TART) through experiences in a single tertiary institution. Materials and Methods: This study retrospectively analyzed 100 consecutive patients who underwent SP-TART from October 2021 to June 2022 in Seoul St. Mary’s Hospital in Seoul, Korea. We analyzed the clinicopathological characteristics and perioperative outcomes, including complications. Results: Less than total thyroidectomy (LTT) was performed in 81, total thyroidectomy (TT) in 16, and TT with modified radical neck dissection (mRND) in 3 patients. The mean operation time (min) was 53.3 ± 13.7, 86.3 ± 15.1, and 245.7 ± 36.7 in LTT, TT, and TT with mRND, respectively. The mean postoperative hospital stay was 2.0 ± 0.2, 2.1 ± 0.3, and 3.7 ± 1.5 days, respectively. A total of 84 cases of thyroid cancer were included, and 97.6% of them (82 cases) were papillary carcinoma and the rest were follicular and poorly differentiated carcinomas. Regarding complications, five cases had major complications, including three cases of vocal cord palsy and two cases of transient hypoparathyroidism. Conclusions: SP-TART is safe and feasible with a short operation time and a short length of hospital stay.

Safety and Efficacy of Transoral Robotic Thyroidectomy for Thyroid Tumor: A Systematic Review and Meta-Analysis

Simple Summary

This systemic review and meta-analysis compared and analyzed the safety and effectiveness of transoral robotic thyroidectomy on the thyroid tumor with other thyroid approaches. Transoral robotic thyroidectomy showed similar results to other robotic-assisted thyroid surgeries. Compared to a conventional open thyroidectomy, transoral robotic thyroidectomy had longer operational times and hospitalization days, and worse postoperative pain, but a higher cosmetic satiation score. However, more randomized controlled studies need to be included and analyzed.

Abstract

Background: To assess the safety and effectiveness of transoral robotic thyroidectomy (TORT) in thyroid tumor. Methods: PubMed, Embase, Web of Science, SCOPUS, Cochrane database, and Google Scholar up to June 2022. Studies comparing outcomes and complications between TORT and control groups (robotic bilateral axillo-breast, trans-axillary, postauricular approach, conventional open thyroidectomy (OT), and transoral endoscopic approach) were analyzed. Results: Ten studies of 1420 individuals. The operative time (SMD 1.15, 95%CI [0.48; 1.89]) was significantly longer and the number of retrieved lymph nodes (LNs) (SMD −0.27, 95%CI [−0.39; −0.16]) was fewer in TORT than in the control group. The postoperative cosmetic satisfaction score (SMD 0.60, 95%CI [0.28; 0.92]) was statistically higher in TORT than in the control group. In subgroup analysis, there was no significant difference between robotic surgeries. However, TORT had significantly longer operative times (SMD 2.08, 95%CI [0.95; 3.20]) and fewer retrieved LNs (SMD −0.32, 95%CI [−0.46; −0.17]) than OT. TORT satisfied significantly more patients in cosmetic view. However, it increased hospitalization days and postoperative pain on the operation day and first day compared to OT. Conclusions: TORT is not inferior to other robotic-assisted approaches. Its operation time and hospitalization days are longer and postoperative pain is greater than OT, although its cosmetic satisfaction is high.