Objective:

To study the characteristics of breast cancer with ultrasound Breast Imaging Reporting and Data System (BI-RADS) category 3-4B

which was pathologically proved to be malignant

and to explore the pathological classification and lymph node metastasis.

Methods:

A retrospective analysis of 176 BI-RADS category 3-4B breast cancer patients with 190 lesions was performed. The features including size

shape

edge

orientation

p

osterior echo

calcification

blood flow

pathological type

molecular typing and lymph node metastasis were analyzed.

Results:

The main pathological types included ductal carcinoma in situ

mucous adenocarcinoma

papillary carcinoma

and infiltrating ductal carcinoma (

2

=45.566

P

＜0.05). There was significant difference in lymph node metastasis (

2

=7.449

P

＜0.05)

but no difference in molecular typing (

2

=3.710

P

＞0.05).

Conclusion:

The majority of breast malignant tumors with BI-RADS category 3-4B are in early stage. With the increasing ultrasound grades

the rate of lymph node metastasis is rising

but the overall prognosis is better.