M Chand1, T Palmer2, L Blomqvist3, I Nagtegaal4, N West5, G Brown6. 1. Royal Marsden Hospital, Downs Road, Sutton, SM2 5PT, UK. Manish.chand@rmh.nhs.uk. 2. Imperial College London, Exhibition Road, London, UK. 3. Karolinska University Hospital, Karolinska, Sweden. 4. Radboud University Medical Centre, Nijmegen, The Netherlands. 5. Leeds University Hospital, Leeds, UK. 6. Department of Radiology, Royal Marsden Hospital, Sutton, UK.