The difference between benign breast tumor and malignant tumor includes: 1. Benign breast tumor: generally the lump has clear boundary, soft texture, and the ultrasound examination is at grade III or below, the lump has less blood supply and grows slowly in the short term. It is not easy to recur after surgery. 2. Malignant breast tumor: the lump has irregular border, hard texture, rich blood supply and rapid growth, and can be found to be graded higher through ultrasound and mammography, usually at grade IV or above. It can be treated by surgery, chemotherapy, radiotherapy, endocrine therapy and biological targeting, but it is easy to recur.