The International Breast Cancer Study Group is a network of institutions in Europe, South America, Australia and New Zealand, Asia, and South Africa. Since 1978, the IBCSG has conducted large, randomized Phase III clinical trials evaluating the timing and duration of chemotherapy and the role of endocrine therapy as adjuvant treatment for breast cancer.
The IBCSG has been a leader in the field of tailored treatment approaches for specific subpopulations of patients with breast cancer. Members of this Department form the Statistical Center for the IBCSG.