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phyllodes tumor
Phyllodes tumors (from Greek: ''phullon'' leaf), also cystosarcoma phyllodes, cystosarcoma phylloides and phylloides tumor, are typically large, fast-growing masses that form from the periductal stromal cells of the breast. They account for less than 1% of all breast neoplasms.
==Classification==
Phyllodes tumors are a fibroepithelial tumor composed of an epithelial and a cellular stromal component. They may be considered benign, borderline, or malignant depending on histologic features including stromal cellularity, infiltration at the tumor's edge, and mitotic activity. All forms of phyllodes tumors are regarded as having malignant potential. They are also known as ''serocystic disease of Brodie''.
They are classified as a fibroepithelial tumor by ICD-O, but not by MeSH.
Women as young as 14 years old have developed the malignant form and it seems to be more aggressive in younger women.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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