The Advanced Breast Cancer ESO-ESMO International Consensus Conference has established itself as a major international breast cancer conference. Its primary aim is the development of international consensus guidelines for the management of ABC.

ABC guidelines are jointly developed by ESO (European School of Oncology) and ESMO (European Society of Medical Oncology) and guidelines or ABC conferences have been endorsed and supported by several other international oncology Organisations such as EUSOMA (European Society of Breast Cancer Specialists), ESTRO (European Society of Radiation Oncology), ESGO (European Society of Gynaecological Oncology), UICC (Union International Contre le Cancer), SIS (Senologic International Society) / ISS (International School of Senology), FLAM (Federacion Latino-Americana de Mastologia), OECI (Organisation of European Cancer Institutes), Susan G. Komen and BCRF (Breast Cancer Research Foundation), and have official representation from ASCO.

The guidelines are based on the most up-to-date evidence and can be used and adapted to guide treatment decisions in many different healthcare settings globally. They are updated at each biennial Conference.