A Salvage Trial of AR Inhibition With ADT and Apalutamide With Radiation Therapy Followed by Docetaxel in Men With PSA Recurrent Prostate Cancer After Radical Prostatectomy (STARTAR)

240mg tablet daily for 36 weeks

ADT will consist of treatment with a GnRH agonist or antagonist per physician and institutional preference. Either leuprolide acetate (Lupron Depot, 22.5 mg or 45 mg IM), triptorelin pamoate (Trelstar, 11.25 mg or 22.5 mg IM), goserelin acetate (Zoladex, 10.8mg SC) or degarelix (Firmagon 120 mg or 240 mg SC) will be administered monthly, every 3 months, or every 6 months, depending on institutional standards, for 36 weeks total.

On week 9 (+/- 28 days), subjects will begin salvage radiation therapy to the prostate bed. The total dose to the prostate bed must be 66-74 Gy in 1.8-2 Gy daily fractions over a total of 6-8 weeks

About 4 weeks (+/- 2 weeks, pending recovery of adverse events from radiation to Grade 2 or less) after completing radiation, patients will start docetaxel 75mg/m2 intravenously, every 3 weeks for 6 cycles.