<qa>  How many women are diagnosed with breast cancer?The proposed project is a prospective longitudinal cohort study of young women with breast cancer. Over a 3-year period, we aim to identify a total of 600 women with newly diagnosed breast cancer, of those 300 women age 40 and younger and 300 older women from academic and community health care institutions across the Riyadh area. It is anticipated that at least 400 of these women from study and control group will agree to participate in the study. 