Have you got a second opinion on the pathology? How much was 4 is as much art as science. There is an aquablation PC trial going on that you might be a good candidate for at John Hopkins and a number of other places (there is a link on the aquablation site). That will be a focal therapy. There are other focal therapies such as HIFU, Tulsa Pro, IRE/Nanoknife, Laser that will ablate the PC area and wind up shrinking the prostate at the same time. You may or may not be a good candidate for some of these. Prostate size is usually in cc and if it is 73 cc it should be able to be radiated. Again, you may need a second opinion on this. I would be hesitant to get a surgical procedure (TURP) just to get radiated. If you do choose a RP, get the best surgeon you can that uses the latest technique to minimize the risk of ED and incontinence. A few on this board have had excellent results. Most have some period of ED and incontinence even with nerve sparing.