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Study identifier: NCT06111781 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

The SUGAR Study; SBRT and Relugolix) for Prostate Cancer

Condition: Prostate Cancer  ·  Sponsor: Yale University

PhasePhase 2
Planned participants60
Who can joinMale, 18 Years to no upper limit
Healthy volunteersNo

About this study

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 of minimal clinically important decline (MCID) in sexual and hormonal function at 6 months for patients undergoing 6 months of androgen deprivation therapy (ADT) Men aged 18+ with cFIR/cgUIR will be enrolled. Specifically, patients must meet one of the following 2 criteria: 1) Gleason score must be Gleason 3+4 with a PSA \< 20 ng/mL, or 2) Gleason 6 (3+3) and PSA \> 10 ng/mL and \< 20 ng mL.

This description comes directly from the study's public registry record.

Talk to the study team

Camalene Chrysostoum  ·  2037375851  ·  camalene.chrysostoum@yale.edu

Tara McPartland  ·  2037377173  ·  tara.mcpartland@yale.edu

Always discuss trial participation with your own doctor first.

Locations (4)

Yale Cancer CenterNew Haven, Connecticut, United StatesRecruiting
Dartmouth-Hitchcock Medical CenterLebanon, New Hampshire, United StatesNot Yet Recruiting
Memorial Sloan Kettering Cancer CenterNew York, New York, United StatesRecruiting
University of WashingtonSeattle, Washington, United StatesRecruiting

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Source record: clinicaltrials.gov/study/NCT06111781