A critical review on the practice changing studies presented at the San Antonio Breast Cancer Symposium, held December 2015, is presented in this podcast. A number of areas, including neoadjuvant and adjuvant treatment, treatment of metastatic disease and the emergence of new biomarkers are addressed. Trials discussed include the WSG-ADAPT HER2+/HR+ phase II trial, which assessed 12-weeks of neoadjuvant TDM1 with or without endocrine therapy versus trastuzumab+endocrine therapy in HER2-positive hormone-receptor-positive early breast cancer, the CREATE-X study, which assessed adjuvant capecitabine in patients with HER2-negative pathologic residual invasive disease after neoadjuvant chemotherapy, and the TH3RESA study, which investigated trastuzumab emtansine use in patients with previously treated HER2-positive metastatic breast cancer. Further, studies on new promising biomarkers such as the prognostic value of circulating tumour cells in follow up of early breast cancer patients after adjuvant chemotherapy are highlighted. Overall, the present podcast represents a comprehensive overview on some of the most important studies presented at the San Antonio Breast Cancer Symposium.