Standard Systemic Therapy With or Without Definitive Treatment in Treating Participants With Metastatic Prostate Cancer

You may qualify if…

• ✓ STEP 1 REGISTRATION: DISEASE-RELATED CRITERIA: All patients must have a histologically or cytologically proven diagnosis of adenocarcinoma of the prostate. Patients with pure small cell carcinoma\* (SCC), sarcomatoid, or squamous cell carcinoma are not eligible. (\*morphology must be consistent with SCC; synaptophysin or chromogranin positive by immunohistochemical staining is insufficient to diagnose SCC).
• ✓ STEP 1 REGISTRATION: DISEASE-RELATED CRITERIA: Patients must have an intact prostate. No prior local therapy for prostate adenocarcinoma is allowed (e.g., brachytherapy, high-intensity focused ultrasound \[HIFU\], cryotherapy, laser ablative therapies). Any prior therapy for benign conditions, such as obstruction, are acceptable (e.g., transurethral resection of the prostate, greenlight laser ablation, microwave ablation).
• ✓ STEP 1 REGISTRATION: DISEASE-RELATED CRITERIA: Patients must have evidence of metastatic disease on technetium bone scan and computed tomography (CT) or magnetic resonance imaging (MRI) within 42 days prior to starting standard systemic therapy. Metastatic disease that is detected by positron emission tomography (PET) scan only (sodium fluoride \[NaF\], prostate-specific membrane antigen \[PSMA\], anti-1-amino-3-18F-fluorocyclobutane-1-carboxylic acid \[FACBC\], carbon \[C\]11) but not conventional imaging (technetium \[Tc\]99 bone scan, CT or MRI) or solitary metastases by conventional imaging, must be confirmed histologically or cytologically.
• ✓ STEP 1 REGISTRATION: DISEASE-RELATED CRITERIA: Patients with known brain metastases are not eligible. Brain imaging studies are not required for eligibility if the patient has no neurologic signs or symptoms suggestive of brain metastasis. If brain imaging studies are performed, they must be negative for disease.
• ✓ STEP 1 REGISTRATION: PRIOR/CONCURRENT THERAPY CRITERIA: Patients must have received no more than 28 weeks of standard systemic therapy (SST). SST is defined as current National Comprehensive Cancer Network (NCCN) guidelines for metastatic prostate cancer.
• ✓ STEP 1 REGISTRATION: PRIOR/CONCURRENT THERAPY CRITERIA: Patients must not have progressed while on SST.
• ✓ STEP 1 REGISTRATION: PRIOR/CONCURRENT THERAPY CRITERIA: Patients with oligometastatic prostate cancer may receive metastasis directed therapy to up to four sites of disease prior to randomization.
• ✓ STEP 1 REGISTRATION: CLINICAL/LABORATORY CRITERIA: Patients must have a complete physical examination and medical history within 28 days prior to registration.