Localized breast cancer can be treated with surgery that removes only the cancer (breast-conserving surgery) rather than with surgery that removes the entire breast (mastectomy). Nevertheless, many women with localized breast cancer are not treated with breast-conserving surgery. Socially disadvantaged women, such as those who are older, are poor, or lack health insurance, are generally less likely to receive high-quality health care and are also less likely to undergo breast-conserving surgery. Women with disabilities have both physical and social disadvantages. They may also be less likely to receive high-quality care, including breast-conserving surgery for early-stage breast cancer. However, this has never been studied.