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Molecular testing reduces surgical resection rates for indeterminate thyroid nodules in Western and Asian cohortsMolecular testing helps decide if surgery is needed for thyroid nodules

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Key Takeaway
Note that molecular testing is associated with lower resection rates for indeterminate thyroid nodules in both regions.

This meta-analysis synthesized data from 127 studies (100 Western; 27 Asian) to evaluate the impact of molecular testing (MT) on surgical management and risk of malignancy (ROM) in patients with indeterminate thyroid nodules. The analysis compared resection rates and ROM between Western and Asian cohorts with and without the use of MT.

Key findings indicate that resection rates without MT were 66.8% in Western cohorts and 53.9% in Asian cohorts. With MT, resection rates were 42.5% in Western cohorts and 37.4% in Asian cohorts. Risk of malignancy was significantly higher in Asian cohorts regardless of MT use (48.0% vs. 29.5% without MT; 62.7% vs. 37.1% with MT). Furthermore, second-generation platforms were associated with lower resection rates (36.1% vs. 48.3%) but higher risk of malignancy (42.8% vs. 34.4%) compared to first-generation platforms in Western cohorts.

Clinical utility of MT varies by region; it serves as a rule-out tool in the West and a confirmatory risk stratification tool in Asia. While MT is associated with reduced surgical interventions in both regions, the association does not establish causality. The evidence suggests that while MT influences management, its specific role is shaped by regional clinical practices.

When a patient is found to have a thyroid nodule, doctors must decide if it is likely to be cancerous. This decision often determines whether a patient needs surgery. A large review of 127 studies looked at how molecular testing, or MT, helps guide these decisions for patients in both Western and Asian regions.

In Western countries, the study found that patients who did not have molecular testing had a 66.8% surgery rate, while those who did have testing had a 42.5% rate. In Asian countries, the surgery rate dropped from 53.9% without testing to 37.4% with testing. While the numbers are different, the trend shows that molecular testing helps reduce the number of surgeries performed in both regions.

However, the role of these tests varies by location. In the West, the test is often used to rule out the need for surgery. In Asia, it is used more to confirm the risk level of the nodule. Because the study shows different risk levels and surgical needs across these regions, patients should talk to their doctors about how these tests apply to their specific situation.

What this means for you:
Molecular testing can help reduce unnecessary surgeries for thyroid nodules in both Western and Asian patients.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedOct 2026
View Original Abstract ↓
BACKGROUND: Molecular testing (MT) aids in the management of indeterminate thyroid nodules; however, regional differences remain unexamined. This meta-analysis compares MT's clinical impact between Western and Asian cohorts. This study hypothesized that regional disparities in malignancy prevalence, molecular platforms, and practice patterns would yield divergent clinical applications of MT. METHODS: A systematic review up to April 2025 identified studies reporting the surgical management and histopathological outcomes of indeterminate nodules in Asian and Western cohorts, stratified by use of MT versus no MT. Pooled proportions were calculated via random-effects models. RESULTS: Of 127 included studies (100 Western; 27 Asian), MT was performed in 96 Western and 21 Asian studies. Western studies predominantly used commercial panels, whereas Asian studies favored smaller, mutation-specific assays. Without MT, resection rates were 66.8% (95% CI, 55.1%-76.7%) in Western studies versus 53.9% (95% CI, 43.5%-64.0%) in Asian studies (p = .11). With MT, rates fell to 42.5% versus 37.4% (p = .275), respectively. Risk of malignancy (ROM) was significantly higher in Asian cohorts, both without MT (48.0% vs. 29.5%; p = .005) and with MT (62.7% vs. 37.1%; p < .001), which persisted after exclusion of follicular thyroid neoplasm with papillary-like nuclear features. In Western studies, second-generation platforms achieved lower resection rates (36.1% vs. 48.3%; p = .001) but higher ROM (42.8% vs. 34.4%; p = .005) than first-generation tests. CONCLUSIONS: MT reduces surgical interventions across both regions by serving divergent roles. In the West, MT functions as a rule-out tool to avoid surgery via comprehensive panels. In Asia, where baseline malignancy is higher and practice is relatively conservative, MT provides confirmatory risk stratification via focused mutation panels. Regionally tailored guidelines are warranted.
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