Epstein, Andrew JWong, Yu-NingMitra, NanditaVachani, AnilHin, SakhenaYang, LinArmstrong, KatrinaSmith-McLallen, AaronGroeneveld, Peter W2023-05-222023-05-222016-02-032016-09-01https://repository.upenn.edu/handle/20.500.14332/38228Genomic testing in patients with early-stage breast cancer is associated with decreased use of chemotherapy and lower costs in younger patients, and slightly increased use of chemotherapy and higher costs in older patients. Genomic testing in actual practice may “rule out” chemotherapy in younger women, and “rule in” chemotherapy in older women.http://creativecommons.org/licenses/by-nd/4.0/personalized medicine and genomicsmedical decision makingAnalytical, Diagnostic and Therapeutic Techniques and EquipmentHealth Services ResearchBrief