Malcolm Mason is the Cancer Research Wales Professor of Clinical Oncology, and Dean of Research in Life Sciences and Health, at Cardiff University. He graduated from St Bartholomew’s Hospital in London, and trained in Oncology at the Institute of Cancer Research & Royal Marsden Hospital. He is the current chair of the UK National Cancer Research Network Prostate Cancer Clinical Studies Group. He has been responsible for a several practice-changing national and international clinical trials in cancer, most notably the recent intergroup study which demonstrated that radiotherapy could halve the mortality from locally advanced prostate cancer. He is the Director of the Wales Cancer Bank, the first national population-based tumour bank to be launched in the UK. He also works for the Union for International Cancer Control on their TNM programme for cancer staging, for which he is the Co-Chair of the Process Task Force, a member of the Core Group, and the Chairman of the UK National TNM Committee.