New AGES Heuristic Aims to Guide Robotic Thyroid Surgery Selection

Researchers from Taiwan have proposed a provisional conceptual heuristic named AGES to organize the complex decision-making process involved in selecting remote-access thyroidectomy techniques. Published in Frontiers in Endocrinology, the narrative review synthesizes literature through August 31, 2026, to address the growing divergence between established endoscopic methods and emerging single-port robotic platforms. The authors, led by Yi-Ju Wu from Jen-Ai Hospital, argue that technical feasibility alone is insufficient to determine the most appropriate surgical route for individual patients. Instead, they suggest a structured sequence that prioritizes disease requirements before considering access preferences, local resources, and patient priorities.

The field of remote-access thyroid surgery has expanded significantly, offering options such as transoral endoscopic thyroidectomy vestibular approach (TOETVA), endoscopic breast-axillary approach (BABA), and various robotic systems. While conventional open cervical thyroidectomy remains the reference operation due to its direct exposure and flexibility, remote-access techniques were developed primarily to avoid visible anterior neck scars. However, the evidence base for these alternative routes is uneven. Comparative data for TOETVA and multi-port robotic approaches are more developed, whereas evidence for newer single-port techniques like GOSTA, SPRA, and SAM remains concentrated in selected institutional cohorts with limited long-term follow-up.

The AGES framework is designed as a non-numeric tool to document disease-first discussions. The acronym stands for Age and physiologic reserve, Gland disease, Extension and Economics, and prior Surgery, Shape/anatomy, Scar priorities, Surgeon, and System capability. The authors emphasize that AGES is not a validated decision-support tool, a scoring system, or a clinical guideline. Rather, it serves as an organizational heuristic to ensure that the operation required by the disease is clearly defined before evaluating whether a specific remote-access route is feasible and appropriate within the available evidence and local capabilities.

The first stage of the proposed sequence focuses on the gland disease and its extension. This involves documenting the required resection extent, such as lobectomy or total thyroidectomy, and any necessary lymph node dissections based on established clinical guidelines, including the 2025 American Thyroid Association recommendations for differentiated thyroid cancer. The review notes that technical completion of a remote-access procedure does not automatically establish oncologic safety. For complex cases involving gross invasion, bulky nodal disease, or anticipated reconstruction, direct open exposure generally remains the preferred approach to ensure adequate surgical control and pathological assessment.

Once the disease-directed operation is defined, the second stage assesses patient and center feasibility. This includes evaluating the patient’s physiologic reserve, such as cardiopulmonary status and tolerance for positioning or CO2 insufflation, as well as anatomical factors like body habitus and prior neck surgery. The framework also considers the treating center’s capabilities, including surgeon experience, team preparedness, and the availability of rescue options. The authors highlight that learning curves significantly impact outcomes; for instance, later experience in gasless transaxillary endoscopy has been associated with shorter operative times and improved postoperative parathyroid hormone levels, underscoring the importance of institutional expertise.

The third stage incorporates economics and patient preferences. This domain accounts for local resource constraints, including operating room time, equipment costs, and reimbursement structures, which vary widely across different health systems. Patient-specific factors such as scar priorities, psychosocial readiness, and quality-of-life goals are also integrated into this phase. The review stresses that economic considerations should be discussed only after medical acceptability is established, and they should not override oncologic requirements. Shared decision-making should involve transparent discussions about the evidence maturity of specific routes, potential complications, and the option of open surgery.

The review addresses the interpretation of inflammatory biomarkers in the context of surgical burden. While some studies have reported higher early inflammatory measures after TOETVA compared to open surgery, the authors caution that markers like C-reactive protein and cytokines are surrogate biological endpoints. They are influenced by various factors, including baseline inflammation and operative duration, and have not been validated as a composite ranking of surgical invasiveness. Therefore, these biochemical differences should be interpreted alongside patient-reported outcomes and functional measures, such as pain, voice function, and return to normal activity, which provide a more comprehensive picture of recovery burden.

Evidence for emerging single-port robotic techniques remains preliminary. For example, the GOSTA technique, which uses CO2 insufflation without an external retractor, has shown technical feasibility in expert centers, but its reproducibility and long-term cancer control are not yet established. Similarly, the SPRA and SAM techniques have been described in small series, with complex subgroups like reoperative cases remaining limited. The authors note that while these platforms offer technical characteristics like reduced arm collision and fewer skin entry sites, these features do not inherently guarantee less tissue injury or better recovery compared to established multi-port systems.

The review identifies significant research gaps that must be addressed before AGES can be considered a standardized instrument. The current evidence base is often retrospective, institution-specific, and subject to selection bias. Direct comparisons between newer single-port routes are scarce, and patient-reported instruments vary across studies. The authors propose a multi-phase validation roadmap, beginning with an international Delphi process to refine the framework’s content and domain boundaries. This would be followed by a prospective multicenter registry to capture preoperative assessments and longitudinal outcomes, including functional recovery and hormonal status.

Subsequent phases of the proposed roadmap include independent assessment of the framework’s completeness and transportability, followed by a clinical utility study comparing AGES-guided counseling to usual care. The authors estimate that a completed clinical utility evaluation could take approximately six to eight years, with separate long-term oncologic follow-up required to assess durable cancer control. Until these validation steps are completed, AGES should be viewed as a provisional conceptual heuristic that supplements existing guidance by organizing discussions around candidate research variables, rather than a tool for making definitive clinical recommendations.

The authors conducted a focused narrative review with a literature cutoff of August 31, 2026, using PubMed and MEDLINE as primary sources alongside reference screening. Their search evaluated English-language adult clinical reports published from 2007 onward, combining thyroidectomy terminology with specific routes and platforms such as TOETVA, BABA, transaxillary endoscopy, da Vinci SP, GOSTA, SPRA, START, SP-TART, and SAM. The authors explicitly characterized their methodology as purposive rather than exhaustive, noting the deliberate absence of a registered systematic review protocol, duplicate independent screening, formal risk-of-bias grading, or quantitative pooling. They also disclosed that generative artificial intelligence assisted with structural revision and language drafting based on selected sources, without generating or analyzing original patient-level data.

Anatomical and operative trade-offs further illustrate why technical feasibility does not guarantee procedural superiority. Conventional open surgery uses a short midline incision situated directly above the thyroid bed, whereas remote-access approaches create substantial tissue corridors that instrument articulation cannot eliminate. TOETVA traverses the lower oral vestibule to establish a subplatysmal tunnel into the central neck, while BABA requires extensive dissection across the bilateral anterior chest and cervical spaces. In a multicenter comparison between TOETVA and endoscopic BABA, operative outcomes favored different approaches: TOETVA had longer overall operative times, less early pain, and shorter hospital stays, whereas endoscopic BABA featured a shorter thyroidectomy phase and less specimen disruption. Furthermore, institutional experiences with TOETVA have diverged substantially over time, with one surgical program reporting favorable selected outcomes over a ten-year experience, while another center abandoned the transoral approach as clinical priorities and institutional alternatives evolved.

Multi-port and single-port robotic investigations also reveal important evidence constraints. While multi-port robotics offers three-dimensional visualization and tremor suppression, it introduces equipment amortization, docking time, and maintenance costs. A retrospective single-center study comparing robotic BABA to endoscopic CABBA following lobectomy and ipsilateral central dissection stratified patients at a body mass index of 24 kg/m². In the higher-BMI subgroup, analyzing only 16 matched patients per group, robotic surgery achieved a higher central lymph node retrieval, but metastatic lymph node counts showed no significant difference, and long-term oncologic outcomes remained unassessed. The authors stress that this BMI boundary represented a study-specific analytical threshold rather than a validated clinical indication. Similar evidentiary gaps characterize emerging single-port platforms. Published single-port series include distinct routes such as the transaxillary SP-TART and START procedures, which must not be conflated with transoral robotic surgery. Moreover, reports like a 64-patient SPRA cohort in women relied on mathematical modeling rather than direct physical measurement to estimate reduced flap area, and an initial feasibility trial of the modular Carina system evaluated only seven patients.

To maintain diagnostic precision, the review refines heuristic terminology by replacing Grade with Gland disease in the AGES mnemonic. This change ensures clinicians distinguish preoperative Bethesda cytological categories, which estimate malignancy risk, from postoperative histological grade, pathological tumor stage, or disease recurrence risk. The authors also highlight that post-surgical length of stay represents a health-system process metric rather than a direct indicator of biological recovery. Discharge timing is shaped by institutional care pathways, drain management protocols, outpatient calcium surveillance, and reimbursement incentives. To prevent misinterpretation in future research, the authors advocate recording when patients become medically fit for discharge separately from their recorded discharge times and any institutional delays. Finally, the authors clarify that statistical evaluation techniques such as calibration, discrimination, and decision-curve analysis are applicable only if a distinct risk-prediction model is formally derived, and cannot be used to validate the non-numeric AGES heuristic itself.

Subject of Research: Proposal of the AGES conceptual heuristic for patient-centered selection in remote-access thyroidectomy

Article Title: From technical feasibility to patient-centered selection in remote-access thyroidectomy: the AGES framework in the single-port robotic era

Article References: Wu, Y.-J., Chan, Y.-C., Chi, S.-Y., Chou, F.-F., & Lin, W.-C. (2026). From technical feasibility to patient-centered selection in remote-access thyroidectomy: the AGES framework in the single-port robotic era. Frontiers in Endocrinology, 17, Article 1983957. https://doi.org/10.3389/fendo.2026.1983957

Image Credits: AI Generated

DOI: 10.3389/fendo.2026.1983957

Keywords: remote-access thyroidectomy, single-port robotic surgery, AGES framework, patient selection, TOETVA, endoscopic thyroid surgery, surgical decision-making, thyroid cancer guidelines, quality of life outcomes, narrative review, robotic platforms, clinical validation, surgical morbidity, health economics, medical heuristics