Breast tissue naturally has a bumpy texture. Some women have more lumpiness in their breasts than others. In most cases, this lumpiness is no cause to worry. This type of lump may be a sign of breast cancer or a benign breast condition cyst fibroadenoma. Feb 1, - glands-growth-disorders~The American Academy of Pediatrics (AAP) discusses some of the main breast abnormalities that can occur in Missing: natural | Must include: natural.