Breast lumps can be caused by:

1. Breast cancer
2. Breast cysts (fluid-filled sacs in breast tissue that are usually benign)
3. Fibroadenoma (a solid, benign mass most common in young women)
4. Fibrocystic breasts (lumpy or rope-like breast tissue)
5. Galactocele (a milk-filled cyst that's usually harmless)
6. Injury or trauma to the breast
7. Intraductal papilloma (a benign, wartlike growth in a milk duct)
8. Lipoma (a slow-growing, doughy mass that's usually harmless)
9. Mastitis (an infection in breast tissue that most commonly affects women who are breast-feeding)

• Definition
• When to see a doctor

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Nov. 26, 2020