SUMMARY
Although accounting for only ~5.6% of invasive breast cancer cases, breast cancer is the most commonly diagnosed cancer among women aged 18-39 (adolescents and young women (AYA)), accounting for 30% of cancers seen in this age group. In contrast to older women, in AYA patients, obesity may be a protective factor against breast cancer as there is an association with decreased hormone synthesis. There has been no proven association between breast cancer risk and in_vitro fertilization. Identifying AYA patients at risk for breast cancer development is important, as 15% of deaths caused by breast cancer . . .

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