Fig. 3

Representative ultrasonography and CEUS appearances of the totally non-enhancing thyroid nodules. A A 17 mm × 15 mm × 24 mm solid suspicious degenerating nodule with macro- and microcalcification in right lobe of thyroid of a 54 years old man. B A 5 mm × 5 mm × 8 mm very hypoechoic solid nodule with multi-macrocalcification in right lobe of thyroid gland of a 32 years old woman. C A cystic large nodule with size of 34 mm × 27 mm × 44 mm in the left thyroid lobe of a 35 years old woman. The solid components in all nodules shown totally non-enhancing during CEUS imaging. Final cytopathologic results were Bethesda class I and classified as inadequate specimen