1. A radiomics nomogram for preoperatively predicting of PLN metastasis in patients with ECC was developed and validated.
2. The model displayed good performance (C-index=0.893 in primary cohort and C-index=0.922 in validation cohort).
3. The radiomics nomogram showed a significant improvement over the clinical nomogram in predicting PLN metastasis.
4. The radiomics signature derived from the combined T2WI and DWI has the best performance.