Abstract: Phyllodes tumours is biphasic, because it is composed of neoplastic stromal cells and evolution containing epithelium. However, this stromal tumour is more cellular and increased. This tumours are far less common than fibroadenoma and de novo arising, and not from previous fibroadenoma tumours. The bad changes are the feared malignant are increased stromal cellularity, anaplasia, high mitotic activity, rapidly increasing tumour size, and infiltative edges. The incidence of phyllodes is <1% of all breast neoplasm in 0,1-0,5%, with the most incidence occurring at the age of 30 to 40 years