A benign nodule (the Bethesda System for Reporting Thyroid Cytopathology category II on fine-needle aspiration cytology) in the right thyroid lobe of a 43-year-old woman.A transverse ultrasonography shows an isoechoic and hyperechoic mixed solid-cystic nodule with well-defined margins (arrowheads). The total malignancy score of this nodule was 1 because of the mixed vascularization (not shown).