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

Table 2

Peripheral rings of thyroid nodules on CEUS and the corresponding pathological types.

Pathology	Regular high-enhancement ring n (%)	Regular no-enhancement ring n (%)	Irregular high-enhancement ring n (%)	Irregular no-enhancement ring n (%)
Benign
Adenoma	20 (28.6%)	5 (41.7%)	0	0
Nodular goiters	40 (57.1%)	2 (16.7%)	0	0
Hashimoto thyroiditis	8 (11.4%)	2 (16.7%)	0	0
Granulomatous thyroiditis	1 (1.4%)	0	0	0
Malignant
Papillary thyroid carcinoma	0	3 (25%)	13 (100%)	24 (96%)
Medullary carcinomas	1 (1.4%)	0	0	1 (4%)
Total	70	12	13	25