What are the advantages and disadvantages of ultrasound examination of breast diseases? Ultrasound examination is painless to the examinee, has no radiological damage, can be performed repeatedly for a short period of time, and is suitable for any age and any physiological period of women, including pregnancy and lactation; 2, before the examination, the examinee usually does not need special preparation, and the operation is relatively simple. 3.Ultrasound has good resolution of soft tissues and can clearly show all layers of the breast and chest wall, so that the anatomical site and level of the lesion can be determined, breast masses and chest wall masses can be identified, and small masses of several millimeters can be found; 4.Determine the physical nature of the mass (cystic, solid or mixed cystic and solid); 5.According to the sonographic performance, combined with blood flow characteristics, the benignity and malignancy of the mass can be inferred. and the presence of local and distant metastases can be detected; 6. Puncture, biopsy and treatment under ultrasound guidance; 7. Screening and follow-up; 8. For dense breasts that are difficult to show on mammography, ultrasound can help determine the presence or absence of masses; 9. Certain nodules, masses, calcifications, etc. can be Doing a BI-RADS grading can guide the clinician to do the next step of proper management. Disadvantages: 1. Although ultrasound is very sensitive to calcified foci within hypoechoic masses, it is difficult to detect tiny calcified foci and burr-like changes easily detected by mammography when no masses are present or when mass images are not obvious; 2. It is still difficult to diagnose the benign and malignant nature of small masses by ultrasound. The fat in the gland or subcutaneous fat is nodular and hypoechoic, sometimes not easy to differentiate from the lesion; 3. For parasternal lymph node metastasis, it is difficult to display due to the obscuration of the sternum and rib cage; 4. The instrument and the frequency of the probe directly affect the image quality and the display of the lesion, and the examiner’s knowledge of breast disease, operational skills and analytical ability have a greater impact on the diagnostic accuracy; at present, I believe that the most scientific method is clinical experience + manual palpation + ultrasound + mammography and sometimes even MRI. Of course, it would be better if there were puncture results.