The SUGAR Study; SBRT and Relugolix) for Prostate Cancer
The goal of this clinical trial is to measure the toxicity and effectiveness of the following treatments for cFIR/cgUIR prostate cancer patients.
Stereotactic body radiotherapy (SBRT) alone or Stereotactic body radiotherapy (SBRT) combined with Ultrashort GNRH Antagonist called Relugolix (an oral drug). Treatments will be randomly assigned to study patients.
The main questions it aims to answer are the following:
1. Whether the proportion of men who undergo SUGAR have superior rate of attaining PSA nadir of \<= 0.2 compared to SBRT alone, and
2. Whether SUGAR is superior to historical rates