Recurrence After Prostatectomy
Here are links to some helpful articles:

What Happens if PSA Comes Back After Surgery?

Radiation Therapy Following Prostatectomy

Salvage External Beam Radiotherapy for Prostate Cancer After Radical Prostatectomy

Predicting the Outcome of Salvage Radiation Therapy

How to Handle a Relapse after Treatment for Prostate Cancer

Radiation Therapy After Prostate Surgery

Management of Biochemically Recurrent Prostate Cancer After Local Therapy: Evolving Standards of Care and New Directions

Predicting the Outcome of Salvage Radiation Therapy for Recurrent Prostate Cancer After Radical Prostatectomy