Unlike older breast cancer survivors, young women 40 and under with breast cancer face different psychological and social burdens: Newer careers, newer couple relationships, younger families, and a peer group that's by-and-large healthy, says a psychologist. Her research looks at women fighting Triple Negative Breast Cancer -- an aggressive subtype striking 10 to 20 percent of women with breast cancer -- typically young, African-American/Hispanic, or testing positive for BRCA1 gene mutation.