The Different Types of Breast Cancer, Explained

Phyllodes Tumor

Phyllodes tumor describes rare tumors that develop in breast tissue that grow in a leaf-like arrangement and account for less than one percent of all diagnosed breast tumors. Phyllodes tumors differ from other types of breast tumors because they do not develop from the cells of an individual's milk ducts or in the cells making up the milk-producing glands or lobules of the breast. Phyllodes tumors develop in the cells that make up the connective tissues inside the breast (stroma), which include the ligaments and fatty tissues that encapsulate and surround the lobules, blood vessels, milk ducts, and lymph vessels in the breast. The most common indication of a phyllodes tumor is a palpable lump or mass that can be felt during a breast examination. Phyllodes tumors tend to grow rapidly, reaching a size of between two and three centimeters in just a matter of weeks or months. Phyllodes tumors can be more challenging to diagnose than other types of breast cancer because they are so rare. A physical exam, mammogram, ultrasound, MRI scan, and tissue biopsy are used to make a phyllodes tumor diagnosis.