Polycystic ovary syndrome (PCOS) is the most common hormonal disorder in women of reproductive age. There is no clear association between PCOS and benign breast disease (BBD). The latter is a frequent benign disorder, affecting women between 20 and 50 years of age. To date, the classification remains controversial, and the risk of developing breast cancer that is associated with these changes is different depending on the histopathological findings. The most frequent changes are breast cysts, which are noted in up to 50% of patients older than 30 years of age. This up-to-date review presents the relationship between PCOS and BBD. In conclusion, there is no clear association between benign breast disease and PCOS. Further studies on a large population with prospectively collected data using updated PCOS criteria are necessary.
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