Age is one of the strongest risk factors for breast cancer: nearly half of new cases occur in women 65 or older, and about 20% in those 75 and up. Yet older women are often left out of clinical trials, leaving doctors with limited evidence on how treatments work in this group. Neil Carleton, a cancer biologist and first-year resident at Brigham and Women’s Hospital, argues that breast tumors in older patients can behave differently due to hormone levels and inflammation, and that care should be tailored rather than