The Value of Peripheral Enhancement Pattern for Diagnosing Thyroid Cancer Using Contrast-Enhanced Ultrasound

Figure 3

A peripheral irregular high-enhancement ring of a thyroid nodule on CEUS. (a) Gray-scale US showed a heterogeneous nodule (arrow) with an ill-defined margin, an irregular shape, and some cystic regions (arrowhead) in the left lobe of thyroid (arrow). (b) CEUS suggested a heterogeneous low-enhancement pattern (arrow) with small no-enhancing regions in the nodule and an irregular incomplete high-enhancement ring (arrowhead) around the nodule. The pathology was papillary thyroid carcinoma.

(a)

(b)