Benign Breast
Diseases
Not all breast lumps or changes mean cancer. Many women experience benign breast diseases — non-cancerous conditions that sometimes mimic symptoms of breast cancer, causing unnecessary fear.
Common Benign Breast Conditions
Breast Cysts
Fluid-filled sacs that make up about 25% of breast lumps. May feel tender or lumpy but do not increase cancer risk. Often disappear without treatment.
Fibroadenomas
The most common solid non-cancerous tumors in women ages 15–35. Do not increase cancer risk and may go away naturally.
Fibrocystic Breast Changes
Caused by hormonal fluctuations, leading to lumpiness, density, and tenderness (especially before menstruation). Common in women ages 30–50. Usually resolves without treatment.
Hyperplasia
Overgrowth of cells in the mammary ducts or glands. Usual hyperplasia: No increased cancer risk; no treatment needed. Atypical hyperplasia: May increase cancer risk — surgical removal may be advised.
Intraductal Papilloma
Small wart-like growths inside a milk duct near the nipple. May cause nipple discharge; more common in women ages 30–50. Risk increases with 5 or more papillomas; surgery can remove them and reduce risk.
Mammary Duct Ectasia
Common in menopausal and post-menopausal women. Causes blocked, inflamed milk ducts, sometimes with inverted nipple or discharge. Usually harmless; antibiotics needed if infection is present.
Traumatic Fat Necrosis
Lumps that form when scar tissue replaces damaged breast tissue (from injury, surgery, or radiation). No cancer risk; no treatment usually required.