The most common cause of benign breast lumps in adolescence is also seen in women older than 40 years. Fibroadenomas have a long natural course, a few may resolve spontaneously or increase in size rapidly and may develop into giant fibroadenomas, with slow change in most cases. Fibroadenomas have a very low rate of malignancy and in rare cases may be associated with breast cancer, most often in LCIS. They are bilateral in 10% of cases and most are unintentionally detected in young patients who present to the clinic. On mammography, it has clear borders, smooth surface and good mobility, like a glass ball played with as a child. The sensitivity and specificity of diagnosing fibroadenoma based on breast ultrasound alone is about 87%. In young women with dense glands, molybdenum and palladium have a limited diagnostic role in fibroadenoma and are not routinely recommended, but for those with suspected malignancy, mammography is recommended. Given the extremely low malignancy rate of fibroadenomas, follow-up observation is recommended for most patients with slow or unchanging growth less than 3 cm in diameter, and a pathologic diagnosis should be obtained for suspected fibroadenomas with a Breast Imaging Reporting Data System (BI-RADS) grade 3 or higher in the imaging judgment. Hollow needle aspiration histology (CNB) is generally recommended to obtain sufficient tissue volume for benign and malignant differentiation. For rapid tumor growth within a short period of time, increased BI-RADS grading level, tumor diameter greater than 3 cm, corresponding clinical symptoms or increased psychological stress of the patient, sexual surgery should be considered, which is mainly a complete resection with expanded margins to avoid recurrence. However, for patients older than 35 years old, surgical excision is required due to the risk of developing lobulated breast tumors. The main surgical approaches are the traditional incisional tumor resection and the newer vacuum-assisted hollow needle minimally invasive spinotomy. The advantages of the traditional surgical approach are that it facilitates complete removal of the tumor under direct vision and protection of the breast tissue, but the disadvantage is that it leaves an aesthetic scar. Vacuum-assisted hollow-needle minimally invasive rotational resection (McMurdo, etc.): The advantage is that it generally does not leave an aesthetic scar, but the disadvantage is that it is not conducive to complete removal of the tumor and protection of the breast tissue.