Patient: Description of the condition (onset time, main symptoms, hospital visited, etc.): Female, 38 years old, in June, the ultrasound detected an oval hypoechoic mass of 1.15×0.6 in the right upper inner quadrant of the right breast, with clear borders, envelope, uniform internal echogenicity and posterior echogenic enhancement. No circumferential blood flow signal was detected around the mass. 1. How to determine benign and malignant? The tumor is generally not large. 4. the peripheral and tumor blood flow is absent or not abundant.