Fig. 3. Graph shows results of ROC analysis for differentiating malignant from benign thyroid incidentalomas by MTV 2.5, MTV 3.0, MTV 3.5, and MTV 4.0.

AUC were 0.764, 0.796, 0.819, and 0.872, respectively. Threshold MTV 4.0 of 0.325 cm3 had 85.9% sensitivity and 71.4% specificity for identifying malignant thyroid incidentalomas.