Postoperative radiation therapy is for patients who have a rising PSA after radical prostatectomy
or have adverse findings in their radical prostatectomy pathology report.
These adverse findings are extra-prostatic tumor extension, cancer cells at the surgical margins,
seminal vesicle invasion, or lymph node involvement.
Postoperative radiation therapy should be given using a high-energy linear accelerator that can
deliver at least 15 million electron volt photons.
It is preferable to use 3-dimensional conformal therapy to reduce the side effects on the rectum.
Usually, the total dose given is approximately 64 Gy.
This therapy involves daily treatments that last only a few minutes, 5 days a week for about 6 and