A breast lump can develop as a result of conditions such as:

  1. Breast cancer
  2. Breast cysts
  3. Fibroadenoma
  4. Fibrocystic breasts
  5. Hamartoma, a noncancerous tumor in the breast
  6. Injury or trauma to the breast
  7. Intraductal papilloma, a noncancerous, wart-like growth in a milk duct
  8. Lipoma
  9. Mastitis
  10. Milk cyst (galactocele)

Causes shown here are commonly associated with this symptom. Work with your doctor or other health care professional for an accurate diagnosis.

Oct. 30, 2012