The 16th St. Gallen Breast Cancer Conference will be held in Vienna, Austria, from March 20 to 23, 2019. For many years the traditional conference, which attracts close to 3.000 delegates from all over the globe, has set the benchmark in primary therapy of early breast cancer. The conference is renowned for its high level of quality as well as its top speakers representing the best in breast cancer research and therapy worldwirde. The highlight of the congress is the St. Gallen Breast Cancer Consensus, in which up to 60 experts gather on stage to engage in a live-voting process on therapy of early breast cancer, which shapes treatment procedures for the coming two years. Participants are sure to witness history in the making for the good of breast cancer patients worldwide. The conference, which will be held in Vienna, Austria for the third time, combines the best of Swiss precision and thoroughness with the strengths of Vienna as a destination: a centrally located meeting place of cultures, which attracts researchers and clinicians from all over the world. In addition, Vienna is a treasure trove of culture and history. Be it music, architecture or cuisine, there will not be a dull moment during congress hours and after. The event is supported by an industry exhibition, showcasing the latest technology for breast cancer diagnosis and care. Industry will also have the opportunity to hold their own activities for the benefit of attendees. Abstracts are accepted from August 31 2018. The submission period ends on 15 December 2018. The conference is pending to be accredited with around 18 CME credits. Special "early bird" registration rates are available until 19 December 2018, after which the regular congress rates apply.