An Interpretable Machine-Learning Model for Predicting Occult Central Lymph Node Metastasis in Papillary Thyroid Cancer
Authors' conclusion
This is the first study to identify RET fusion positivity as an independent OLNM risk factor in cN0 PTC. The developed RF model demonstrates moderate predictive performance for OLNM risk and provides a framework for integrating clinical, sonographic, and molecular data, and is deployed as a web calculator (https://predictingoccultlymphnodemetastasis.shinyapps.io/web3/).
Study context
- Population
- Patients with clinically lymph node negative (cN0) papillary thyroid carcinoma (PTC), August 2018–August 2023
- Participants
- 961 patients
- Outcome
- Prediction of occult central lymph node metastasis (OLNM)
Methodological detailsmachine-learning prediction model, random split into training and test sets, internal validation in tumors ≤1 cm, SHAP interpretability
- Machine-learning prediction model
- Random split into training and test sets
- Internal validation in tumors ≤1 cm
- SHAP interpretability
Main finding
As reported in the abstract
Predictive performance for OLNM
| Group | AUC, training set | AUC, test set | Brier score, training set | Brier score, test set |
|---|---|---|---|---|
| Random forest (RF) | 0.906 | 0.733 | 0.135 | 0.212 |
Random forest (RF)
AUC, training set0.906
AUC, test set0.733
Brier score, training set0.135
Brier score, test set0.212
Observational data: associations, not effects.
Further findings
| Outcome | Values |
|---|---|
| Internal validation in tumors ≤1 cm (test-set subset) | RF AUC 0.719 |
Independent risk factors for occult lymph node metastasis (OLNM)
- Predictors incorporated into the model
- 9
- RET fusion positivity and BRAF mutation positivity were independent molecular risk factors, alongside 6 clinical and ultrasonographic variables
SHAP analysis
- Top predictors: size, age, and clustered punctate echogenic foci
Original publication
An Interpretable Machine-Learning Model for Predicting Occult Central Lymph Node Metastasis in Papillary Thyroid Cancer. J Clin Endocrinol Metab. Published 11 December 2025. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →