They often take 12 cores from six sextants of the prostate. They usually distinguish one as medial and one as lateral. It's a good idea to have that fusion biopsy as confirmation - hopefully, you'll be able to stay on AS.
I've learned about
biopsy pain and how to avoid it, having had three myself. Ask for a "pelvic plexus block" or a "periprostatic nerve block" (use those words). When I had that, I didn't feel a thing, and I wasn't groggy as when I had general anesthesia. You have to get a biopsy specialist who knows how to locate the correct nerves.
Allen - not an MD
•PSA=7.3, prostate volume=55cc, 8/17 cores G6 5-35% involvement
•SBRT 9 yr onc. results
•SBRT 7 yr QOL results
•treated 10/2010 at age 57 at UCLA,PSA now: 0.1,no lasting urinary, rectal or sexual SEsmy PC blog