Breastfeeding linked with decreased breast cancer recurrence risk

the ONA take:

According to a new Kaiser Permanente study published in the Journal of the National Cancer Institute, women diagnosed with breast cancer who previously breastfed their babies had a 30% overall decreased risk of disease recurrence.

For the study, researchers analyzed data from 1,636 women with breast cancer who completed a questionnaire that included breastfeeding history.

Researchers observed significant benefits between women who had a history of breastfeeding and outcomes of those diagnosed with the luminal A subtype of breast cancer, such as estrogen-receptor positive tumors. Results also showed women who breastfed were 28% less likely to die from the disease.

"Women who breastfeed are more likely to get the luminal A subtype of breast cancer, which is less aggressive, and breastfeeding may set up a molecular environment that makes the tumor more responsive to anti-estrogen therapy," lead author Marilyn L. Kwan, PhD said as a possible explanation of the observed association.

Breastfeeding may decrease risk of pediatric acute lymphoblastic leukemia
Women diagnosed with breast cancer who previously breastfed their babies had a 30% overall decreased risk of disease recurrence.
Women diagnosed with breast cancer who previously breastfed their babies had a 30 percent overall decreased risk of the disease recurring, according to a new Kaiser Permanente study published in the Journal of the National Cancer Institute.
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