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ROC curves of PTC size [area under the ROC curve (AUROC) = 0.598], homogeneity on CEUS (AUROC = 0.560), peak intensity on CEUS (AUROC = 0703), and Equation (AUROC = 0.757) for the prediction of CLNM. CEUS, contrast-enhanced ultrasound; CLNM, cervical lymph node metastasis; PTC, papillary thyroid carcinoma; ROC, receiver operating characteristic.
