Table 3.

Comparison between benign and malign fTI groups.

US characteristics	Benign (n = 31)	Malignant (n = 10)	P value
Size (mm; mean ± s.d.)	17.2 ± 7.1	20.0 ± 16.4	0.619
Hypoechogenicity (n)	15	8	0.145
Marked hypoechogenicity (n)	1	2	0.149
Irregular margins (n)	3	3	0.163
More tall than wide (n)	1	2	0.156
Microcalcification(s) (n)	4	2	0.29
Kim criteria* (n)	4	6	0.006
TIRADS ≥ 4A* (n)	10	9	0.238
FES guidelines* (n)	17	6	0.775

^*Proportion of FNAB indication according to each US classification.