Cost-effectiveness techniques can provide valuable insight into breast cancer treatment. A recent PHAR, LLC study assessed the impact on health outcomes and healthcare expenditures of adopting a 21-gene assay for women with early-stage, minimally node-positive, estrogen receptor-positive HER2-negative breast cancer. The study found that the use of this 21-gene assay was associated with improved outcomes for these breast cancer patients, with no additional cost. To see the publication in its entirety, visit The American Journal of Managed Care website.