Thanks Barry, that's an important corrective and clearly based on a lot of knowledge of the subject. I certainly wouldn't want to put people off HIFU where it is the right choice for them. Initially, it was the thing that I most wanted to have, since it seems to be the least damaging from of treatment, so I was gutted when the specialist wasn't very positive about it. There was another complicating factor in my case, which was the position of the tumour, close to the apex and therefore the sphincter. That didn't make it impossible, apparently, but did make it potentially trickier. It's interesting what you say about it not being an issue to have RP after HIFU. This is not what the specialist told me, but I suppose it just points to the necessity of doing as much research as you can and getting a variety of opinions -- and making sure to go to the top experts. To be honest, it never occurred to me to question it. The video you have linked to is really interesting. The specialist that I spoke to was also at UCLH, so it it is astonishing to me how different his account was to the account in the video, which is dated about a month before I had my consultation.