Women experience various kinds of breast lumps and other breast changes.
These changes include those that normally occur during the menstrual cycle, during pregnancy, and with aging, as well as several types of breast lumps and other changes. Most breast lumps and other changes are benign. Among breast conditions for which biopsies are often done, the results show that some 80 percent are not cancer. Each breast has 15 to 20 sections, called lobes, each with many smaller lobules. The lobules end in dozens of tiny bulbs that can produce milk.