Table 2. The BI-RADS categories of breast nodules.

	Total	Benign	Malignant	Malignant rate (%)
BI-RADS 3	25	25	0	0.0
BI-RADS 4A	137	120	17	12.4
BI-RADS 4B	78	45	33	42.3
BI-RADS 4C	60	2	58	96.7
BI-RADS 5	5	0	5	100.0

Notes.

BI-RADS, Breast Imaging Reporting and Data System.