叶状瘤占乳腺肿瘤的1％，约占乳腺上皮样肿瘤的2～3％[1]。与纤维腺瘤一样，叶状瘤是由上皮成份及结缔组织基质构成的，但叶状瘤具有更完善的基质细胞结构。肉眼观察叶状瘤呈肉质。分叶、囊状，MulerJ首先于1838年将叶状瘤描述为“叶状囊性肉瘤”，并认为该肿瘤为良性。1931年L The phyllodes tumor accounts for 1% of breast tumors and accounts for about 2-3% of breast epithelioid tumors [1]. Like fibroadenoma, phyllodes are composed of epithelial components and connective tissue matrix, but phyllodes have a more complete stromal cell structure. Visual observation of phyllodes tumors was meaty. Splitting and cystic, Muler J first described the phyllodes as “cystolar cystic sarcoma” in 1838 and considered the tumor to be benign. 1931 L