Breast cancer is the most common cancer diagnosis in women aged less than 40 years and
the second most common cause of cancer death in this age group. Global rates of young …

A growing body of work indicates that exposures over the life course have important roles to
play in the aetiology of breast cancer. This review synthesises the literature that has been …

Nearly one in four breast cancers is diagnosed before the age of 50, and many early-stage
premalignant lesions are present but not yet diagnosed. Therefore, we review evidence to …

Because of its increasing incidence, breast cancer is a significant burden for women
worldwide. In industrialized countries, breast cancer is the second-leading cause of cancer …

Breast cancer is the most common malignancy in women with 6.6% of cases diagnosed in
young women below the age of 40. Despite variances in risk factors, Age Standardized …

Simple Summary Breast cancer is the most common cancer affecting women under 40 years
of age worldwide, with an increasing number of cases diagnosed each year. Despite this …

Aspects of nutrition and lifestyle may be largely responsible for the development of common
cancers in Western countries, as indicated by the large differences in breast cancer rates …

The perinatal period, childhood, and adolescence are important intervals for breast cancer
risk development. Endogenous estrogen exposure is thought to be highest in utero, and …

Almost 7% of breast cancers are diagnosed among women age 40 years and younger in
Western populations. Clinical outcomes among young women are worse. Early age-of-onset …

At least a fifth of breast cancer cases in Western countries are likely to be due to modifiable
lifestyle factors. Previous work has found that while women in Western countries are aware …