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ROC analyses for the diagnostic performance of the CEUS TI-RADS for predicting the malignancy of thyroid nodules in different groups. The nodules were grouped based on their sizes as follows: size ≤1 cm, group A; size >1 and ≤4 cm, group B; and size >4 cm, group C. AUC, area under the curve; ROC, receiver operating characteristic; CEUS TI-RADS, contrasted-enhanced ultrasound thyroid imaging reporting and data system.
