Table 2. BI-RADS Classification by CESM and US, and Association with Histological Results.

BI-RADS Classification	Malignant	Benign	Total
CESM
BI-RADS 1	1	18	19
BI-RADS 2	1	3	4
BI-RADS 3	2	38	40
BI-RADS 4	27	5	32
BI-RADS 5	33	3	36
US
BI-RADS 1	0	2	2
BI-RADS 2	0	0	0
BI-RADS 3	6	53	59
BI-RADS 4	35	10	45
BI-RADS 5	23	2	25
Total	64	67	131

BI-RADS = Breast Imaging Reporting and Data System, CESM = contrast-enhanced spectral mammography, US = ultrasonography