Professor Mary K. Gospodarowicz’s record of service in the Union for International Cancer Control (UICC) stretches back two decades.She has been active since 1990 in UICC'S work on cancer staging, currently chairing the TNM Prognostic Factors Project. She edited three editions of Prognostic Factors in Cancer (3rd edition, August 2006) and the seventh edition of the TNM Classification of Malignant Tumours (November 2009), both published for UICC by John Wiley. Professor Gospodarowicz was a member of the former UICC Council, serving on the Executive Committee. She was elected to the Board of Directors from its inception, serving as a member of the Policy and Finance Committees, UICC Treasurer, Chair of the Membership Committee, and for the past two years as President-Elect.Mary Gospodarowicz is the Medical Director of the Princess Margaret Cancer Centre at the University Health Network in Toronto, Canada and Regional Vice-President of Cancer Care Ontario for Toronto South. She recently completed a 10 year term as Professor and Chair of the Department of Radiation Oncology at the University of Toronto and Chief of the Radiation Medicine Program at Princess Margaret.She is an Fellow of the American Society of Radiology and Oncology (ASTRO), honorary fellow of the Royal College of Radiologists in the United Kingdom, an honorary member of the European Society of Therapeutic Radiology and Oncology (ESTRO), and a past president of the Canadian Association of Radiation Oncologists.