Adenosis is a benign (non-cancerous) condition often spotted during a breast self-exam ormammogram.

Premenopausal women are most commonly affected.

Treatment is usually not necessary unless there is pain.

woman speaking to her doctor

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It also explains why this benign condition is sometimes monitored for breast cancer.

This is because the lumps are often small and not situated near the surface of the skin.

One or both breasts may be affected.

Unlike many types of breast cancer, adenosis does not change the skin or shape of the breast.

It also does not affectlymph nodes.

What Causes Adenosis of the Breast?

Scientists do not know what causes adenosis.

Some research suggests that, in some people, the hormoneestrogentriggers the rapid growth of cells lining milk-producing glands.

This would explain why the lumps get larger or smaller during the menstrual cycle.

Other factors such as genetics may contribute.

More research is needed.

Imaging tests such as amammogramor ultrasound can certainly help, but even those have limitations.

The problem is that the same can occur when looking at breast cancer on a mammogram.

How Is Breast Adenosis Treated?

Since adenosis is not cancer, no treatment is necessary.

If the breasts are painful, wearing a bra with good support may help.

For some females, reducing caffeine consumption has been known to help (although it is unclear why).

If you have been diagnosed with sclerosing adenosis, your healthcare provider may recommend routine screening for breast cancer.

Summary

Adenosis of the breast is a noncancerous condition in which the milk glands increase in size.

This can cause lumps that may be painful and change in size during your menstrual cycles.

American Cancer Society.Adenosis of the breast.

2009;118(1):1-7. doi:10.1007/s10549-008-0198-8

American Cancer Society.Breast biopsy.

American Academy of Family Physicians.Benign breast conditions.