乳腺纤维瘤是发生于乳腺小叶内,纤维组织和腺上皮的混合性良性瘤,是乳房良性肿瘤中最常见的一种,可发生于任何年龄的成年女性,特别好发于18~35岁者,尤以20~25岁者最常见。其纤维成分可恶变为肉瘤,腺上皮可恶变为癌,但恶变者比较少见。乳腺纤维瘤的发病原因目前还不是十分清楚,可能是体内雌激素水平相对或绝对升高,导致乳腺导管上皮和间质成分异常增生,形成 Breast fibroids are mixed benign tumors that occur within the lobular lobes, fibrous tissues and glandular epithelium of the breast and are the most common form of benign breast disease and can occur in adult women of any age, particularly those aged 18-35 , Especially in 20 to 25 years of age the most common. The fiber components of malignant change into sarcoma, glandular epithelium malignant change into cancer, but the less common malignant. The pathogenesis of breast fibroids is not yet very clear, may be the relative or absolute increase in estrogen levels, leading to breast duct epithelial and interstitial components of abnormal proliferation, the formation of