Breast cancer accounts for the most frequently diagnosed malignancy and the second-highest number of cancer-related deaths in women. Although the most common types of breast cancer are epithelial tumors of the ducts of lobular units, other types exist which affect mortality significantly. Another subtype category is the family of fibroepithelial tumors, which include fibroadenomas most commonly and phyllodes tumors. In 1981 the World Health Organization adopted the term phyllodes tumour and sub-classified them histologically as benign, borderline, or malignant according to the features such as tumour margins, stromal overgrowth, tumour necrosis, cellular atypia, and number of mitosis per high power field as described by Rosen in Rosen′s Breast Pathology, Lippincott.
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