My brother had surgery for Prostate Cancer in 2009, with complete removal. They found cancer in two lymp nodes. He was placed on hormone therapy, with no other treatment. His PSA has starrted to rise again, and after a bone scan his doctor has decided he would benefit from radiation treatments for 7 weeks. My question is this: Why use the radiation treatment if you cannot determine if it has moved to another location? Is it because they know that area stands a greater chance of having the cancer return? Also, I understand a PET scan is usually not done on Prostate Cancer patients. Any suggestions?View Thread