Fibrocystic breast changes -- once called fibrocystic breast disease -- is a common noncancerous breast condition. More than half of all women have fibrocystic breasts at some point.
Fibrocystic breast changes can occur at any age, but is most common in younger women of childbearing age. Fibrocystic breasts after menopause are not as common. Fibrocystic changes can occur in one or both breasts and in more than one type of breast tissue.
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Most fibrocystic breast changes are the result of monthly hormonal changes and are nothing to be concerned about. However, some may suggest a slightly increased risk of cancer. These may require other tests to confirm a diagnosis.
Types of fibrocystic breast changes are:
Fibrosis. This is fibrous tissue similar to scar tissue. It feels rubbery, firm, or hard to the touch. It does not increase the risk for cancer.
Cysts. These are fluid-filled sacs. Microscopic cysts are too small to feel. These may get bigger and form macrocysts, which may be 1 to 2 inches across; at this size you can feel them.
Cysts may enlarge and become tender right before your period. They tend to be round and movable. But it may be hard to tell the difference between a cyst and a solid mass. So you may need other tests to confirm a diagnosis.
Symptoms of Fibrocystic Breast Changes
Common symptoms of fibrocystic breast changes are:
Breast swelling or thickening
Lumps within the breast, which may vary in size and texture
Symptoms may change throughout your menstrual cycle. That's because hormones increase the amount of fluid in your breasts. Your breasts may also change during pregnancy or in response to hormones you take. This includes hormones in birth control pills and hormone replacement therapy.
If you find a lump or other breast change, especially if it remains the same throughout your cycle, see your doctor. Be prepared to answer questions like these:
Describe your breast lump or changes. Has this changed over time?
When was your last period? Are you pregnant or nursing?