Complementary and Alternative Medicines and Patients With Breast Cancer: A Case of Mortality and Systematic Review of Patterns of Use in Patients With Breast Cancer

BACKGROUND: The use of complementary and alternative medicines (CAMs) is common among women being treated for breast cancer. A recent mortality associated with CAM at our center precipitated a systematic review of the Cochrane, EMBASE, and PubMed databases to identify English manuscripts including "CAM" and "breast cancer." METHODS: Papers included for review were selected based on predefined inclusion and exclusion criteria. The primary outcome was the use of CAM by women with breast cancer. Secondary outcomes included timing of use along disease trajectory, attitudes toward CAM by allopathic practitioners, and patient disclosure of CAM use to treating allopathic physicians. RESULTS: Of 701 titles identified by the search strategy, 36 met the inclusion criteria. The weighted average proportion of women with breast cancer who use CAM was 40% (standard deviation: 18%). The diagnosis of breast cancer also prompts the initiation or increase of CAM use. However, up to 84% of patients do not disclose the use of CAM to their allopathic practitioners. CONCLUSIONS: Although CAM is often dismissed as a harmless addition to allopathic therapy, significant complications and interactions can occur. Our review and the dramatic case example provided highlight the need for physicians to educate themselves regarding CAM and to engage with their patients regarding its use.