Malignancy Risk and Related Factors of Atypia of Undetermined Significance/Follicular Lesion of Undetermined Significance in Thyroid Fine Needle Aspiration

Table 3

Comparison of characteristics between surgically confirmed (histologically confirmed?) benign and malignant nodules after initially being diagnosed as AUS/FLUS.

	Number of nodules	Age (yrs)	Number of women (%)	TSH (uIU/mL)	Free T4 (ng/dL)	Size (mm)	K-TIRADS
Benign	26	51 ± 11	23 (88.5)	2.18 ± 1.86	1.30 ± 0.38	24.9 ± 13.9	3.2 ± 0.4
Malignant	70	52 ± 11	64 (91.4)	2.42 ± 1.98	1.25 ± 0.22	9.9 ± 11.3	4.1 ± 0.6
value		0.66	0.66	0.59	0.59	<0.01	<0.01

AUS/FLUS: atypia of undetermined significance/follicular lesion of undetermined significance; K-TIRADS: Korean Thyroid Imaging Reporting and Data System.