Professor Nicholas van As is Medical Director of The Royal Marsden, Consultant Clinical Oncologist in the Urology Unit, and a Reader at the Institute of Cancer Research.
Professor van As' main research interests are in stereotactic and image-guided radiotherapy, treatment of oligometastaic disease, risk prediction in early prostate cancer, and functional magnetic resonance imaging. He has published numerous papers on these subjects and delivered presentations at international meetings.
Professor van As is clinical lead for stereotactic body radiotherapy (SBRT) at The Royal Marsden, national clinical lead for NHS England's evaluation programme for SBRT. He is Chair of the UK SBRT Consortium. He leads a number of clinical trials, most notably he is chief investigator for the international clinical trial PACE, comparing SBRT to image-guided radiotherapy and surgery for treating localised prostate cancer.