Surgery has been the most usual route for 'young' men for many years. If they are able to remove all cancer with the Prostate, unlike with RT or Focal therapy, there is not the risk of cancer developing at some point in the Prostate over many remaining years. There may be other reasons why one of the forms of RT may be unsuitable in an individual case but it is a treatment with a long history. Long term outcomes of HIFU have yet to be established and a higher proportion of men treated with HIFU need it to be repeated or to be followed in some cases by RP or RT as salvage treatment. However, HIFU, (one form of Focal Treatment), has fewer and milder side effects than with RP or RT. So as a Primary Treatment HIFU has generally been given to older men or those that are prepared to accept the greater and unknown risk of subsequent treatment over many years for less severe side effects.