Wife:
A member of my PCa support group had surgery for colo-rectal coancer in the past and then was diagnosed with prostate cancer, treated with radiation/hormone combination since the colon surgery eliminated the surgical option for the prostate. These events were not synchronous, separated by some few years. It is likely that the colon cancer will be the more serious of the two. It is nearly impossible that the prostate cancer has created the colon cancer. Prostate cancer occasionally invades the rectal wall but is still prostate cancer.