Hardbound. The European School of Oncology (ESO) is a non-governmental, non profit-making organisation, which was founded in 1982. The rate of progress in the areas of diagnosis and treatment of cancer is so rapid that oncologists need continuous updating in order to provide their patients the best chances for palliation or cure. ESO recognises the multi-disciplinary nature of cancer treatment, and its activities encompass all medical, nursing and technical specialities dealing with neoplastic diseases. One of the many initiatives of ESO has been the institution of task forces, where leading experts exchange views on the state-of-the-art of a given field, discuss controversies, new developments, and give opinions on future directions. The Scientific Updates are a series of books designed to disseminate the full results of such discussions. The Breast Cancer Task Force of the European School of Oncology met at Runnymede, near London, in