Dr. Marc Spielmann is a medical oncologist specialising in breast cancer and Director of the Institut Français du Sein (French Breast Institute) in Paris. He spent the majority of his career at Gustave Roussy Cancer Campus, where he was Head of the Department of Cancerology and Breast Pathology (Oncologie Médicale et Pathologie Mammaire) and, subsequently, Medical Director of the International Affairs Division. He has authored more than 290 peer-reviewed scientific and medical publications in national and international journals, with over 10,000 citations, and has served on the scientific committees of numerous national and international courses and congresses. He is a member of ASCO, ESMO, the Société Française de Sénologie et de Pathologie Mammaire (SFSPM), and the Société Française de Mastologie et de Pathologie Mammaire (SFMPP).