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NCT04510597 · SWOG Cancer Research Network

Comparing the Outcome of Immunotherapy-Based Drug Combination Therapy With or Without Surgery to Remove the Kidney in Metastatic Kidney Cancer, the PROBE Trial

(PROBE)

What this study is about

This phase III trial compares the effect of adding surgery to a the usual treatment immunotherapy-based drug combination versus a the usual treatment immunotherapy-based drug combination alone in treating patients with kidney cancer that has spread to other places in the body (metastatic).

View original scientific description

This phase III trial compares the effect of adding surgery to a standard of care immunotherapy-based drug combination versus a standard of care immunotherapy-based drug combination alone in treating patients with kidney cancer that has spread to other places in the body (metastatic).

Interventions

PROCEDURE

Cytoreductive Nephrectomy

Radical or partial nephrectomy may be performed using laparoscopic, open, or robotic approaches. Surgery should be performed within 8 weeks of randomization

DRUG

Active Comparator

Nivolumab 240 mg IV 1 q 2 weeks OR Nivolumab 480 mg IV 1 q 4 weeks OR Pembrolizumab 200 mg IV 1 q 3 weeks Axitinib 5 mg oral Daily BID OR Avelumab 10 mg/kg IV 1 q 2 weeks Axitinib 5 mg oral Daily BID

Primary outcome measures

Overall survival

Time frame: From date of randomization to date of death due to any cause, assessed up to 7 years.

Analysis will be intent-to-treat. Evidence suggesting early termination of the trial and a conclusion that the cytoreductive nephrectomy (CN) approach is superior to treatment alone would be if the null hypothesis is rejected at the one-sided 0.005 level. For the second and third interim analyses, the null and alternative hypotheses with respect to survival will be tested, with superiority tested at the one-sided 0.005 level, and futility determined to be met if the (CN versus no CN) hazard ratio is greater than or equal to 1. A proportional hazards model will be fit to estimate the hazard ratio adjusting for the stratification factors as covariates in the model. Will evaluate whether each of the stratification factors are predictive factors of cytoreductive nephrectomy by placing an interaction term corresponding to each stratification factor and treatment arm in the proportional hazards survival model.

Who can participate

This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.

Inclusion criteria

  • STEP 1 REGISTRATION: Participants must have a histologically proven diagnosis of clear cell or non-clear cell renal cell carcinoma. Participants with collecting duct carcinoma histology are not eligible. Participants with multifocal or bilateral tumors are eligible
  • STEP 1 REGISTRATION: Participants must have primary tumor in place
  • STEP 1 REGISTRATION: Participants must have the following scans performed, showing clinical evidence of measurable or non-measurable metastatic disease:
  • Computed tomography (CT) scan of the chest (can be performed without contrast if CT contrast cannot be given)
  • CT of abdomen and pelvis with contrast OR magnetic resonance imaging (MRI) of the abdomen and pelvis with or without contrast Scans must be performed within the following timeframes:
  • Treatment naive participants must have scans documenting metastatic disease completed within 90 days prior to study registration
  • Previously treated participants must have scans documenting metastatic disease completed within 90 days prior to first dose of systemic treatment
  • STEP 1 REGISTRATION: Participants with symptomatic metastases may have received palliative radiotherapy or receive palliative radiotherapy after registration
  • STEP 1 REGISTRATION: Participants must have no clear contraindications to nephrectomy
  • STEP 1 REGISTRATION: Participants must be offered the opportunity to participate in specimen bank. With participant consent, specimens must be collected and submitted via the Southwest Oncology Group (SWOG) Specimen Tracking System
  • STEP 1 REGISTRATION: Participants must be informed of the investigational nature of this study and must sign and give informed consent in accordance with institutional and federal guidelines
  • STEP 1 REGISTRATION: As part of the Oncology Patient Enrollment Network (OPEN) registration process the treating institution's identity is provided in order to ensure that the current (within 365 days) date of institutional review board approval for this study has been entered in the system
  • STEP 2 REGISTRATION: Participants must have at least one of the following scans performed 12 weeks (+/- 2 weeks) after starting pre-randomization treatment
  • CT scan of the chest (can be performed without contrast if CT contrast cannot be given)
  • CT of abdomen and pelvis with contrast OR MRI of the abdomen and pelvis with or without contrast Scans must be performed within 28 days prior to randomization. Response should be assessed by comparing with a CT or MRI of the chest, abdomen and pelvis obtained prior to starting pre-randomization treatment. Participants with complete response in all metastatic sites are not eligible to randomize to Step 2 • STEP 2 REGISTRATION: Participants must have one of the following objective statuses after 12 weeks of pre-randomization treatment
  • Stable disease
  • Partial response
  • The treating investigator believes the patient is deriving clinical benefit from systemic therapy AND have Zubrod performance status 0-1
  • STEP 2 REGISTRATION: Participants must plan to continue the immune-based therapy received during pre-randomization treatment
  • STEP 2 REGISTRATION: Participants must be randomized on or between the 11th and 14th week of protocol-directed pre-randomization treatment therapy
  • STEP 2 REGISTRATION: Participants must have received at least one of the minimum amounts of immunotherapy:
  • 2 infusions of nivolumab + 1 infusion of ipilimumab
  • 2 infusions of pembrolizumab
  • 2 infusions of avelumab
  • STEP 2 REGISTRATION: Participants must have a planned surgery date within 42 days of randomization
  • STEP 2 REGISTRATION: Participants must be a surgical candidate as determined by study urologist. The urology consult should be done within 42 days prior to randomization
  • STEP 2 REGISTRATION: Participants must have a complete physical examination and medical history within 28 days prior to randomization
  • STEP 2 REGISTRATION: Participants must have a Zubrod performance status of 0-1 within 28 days prior to randomization
  • STEP 2 REGISTRATION: Total bilirubin =\< institutional upper limit of normal (ULN) (within 28 days prior to randomization)
  • STEP 2 REGISTRATION: Aspartate aminotransferase (AST)/alanine aminotransferase (ALT) =\< 3 x institutional upper limit of normal (ULN) (within 28 days prior to randomization)
  • STEP 2 REGISTRATION: Serum creatinine =\< 1.5 x the institutional upper limit of normal (IULN) OR measured OR calculated creatinine clearance \>= 50 mL/min using the Cockcroft-Gault Formula) (must have been drawn and processed within 28 days prior to randomization)

Exclusion criteria

  • STEP 1 REGISTRATION: Participants must not have known active brain metastases. Participants with previously treated brain metastases are eligible if participant has no neurologic signs or symptoms suggestive of brain metastasis. Brain imaging studies are not required. If brain imaging studies are performed, they must be negative for disease
  • STEP 1 REGISTRATION: Participants must not have received the following prior treatment of metastatic renal cell carcinoma:
  • Treatment naive participants must not have received any prior lines of systemic therapy for metastatic renal cell carcinoma beyond the line intended as part of protocol therapy
  • Previously treated participants must not have received any systemic therapy for metastatic renal cell carcinoma beyond the one regimen received off protocol as specified in Step 1 pre-randomization treatment
  • STEP 1 REGISTRATION: Participants must not have received more than the following amounts protocol-directed pre-randomization treatment:
  • Treatment naive participants must not have received any pre-randomization treatment.
  • Previously treated participants must not be planning to receive any additional treatment prior to Step 2 randomization, and must not have received more than the following amounts of pre-randomization treatment:
  • 4 infusions of nivolumab
  • 4 infusions of ipilimumab
  • 4 infusions of pembrolizumab
  • 7 infusions of avelumab
  • STEP 1 REGISTRATION: Participants must not have received immunotherapy for any cancer within the following timeframes:
  • Treatment naive participants must not have received any immunotherapy within a year of registration
  • Previously treated participants must not have received any other immunotherapy within a year of the start of off protocol specified pre-randomization treatment
  • STEP 1 REGISTRATION: Participants must not have a solitary kidney and not have a transplanted kidney
  • STEP 1 REGISTRATION: No other prior malignancy is allowed except for the following: adequately treated basal cell or squamous cell skin cancer, any in situ or T1 cancer, adequately treated stage I or II cancer from which the participant is currently in complete remission, or any other cancer from which the participant has been disease free for at least two years
  • STEP 1 REGISTRATION: Participants must not have been previously diagnosed with a medical condition that makes them ineligible for immune based combination therapy or nephrectomy
  • STEP 2 REGISTRATION: Participants must not show progression in the primary tumor. Participants who are considered to have pseudo progression are allowed
  • STEP 2 REGISTRATION: Participants must not have known active brain metastases. Participants with previously treated brain metastases are eligible if participant has no neurologic signs or symptoms suggestive of brain metastasis. Brain imaging studies are not required. If brain imaging studies are performed, they must be negative for disease
  • STEP 2 REGISTRATION: No other prior malignancy is allowed except for the following: adequately treated basal cell or squamous cell skin cancer, in situ cervical cancer, adequately treated stage I or II cancer from which the participant is currently in complete remission, or any other cancer from which the participant has been disease free for two years

Where

  • Birmingham, Alabama
  • Gilbert, Arizona
  • Kingman, Arizona
  • Tucson, Arizona
  • Fort Smith, Arkansas
  • Arroyo Grande, California
  • Auburn, California
  • Berkeley, California
  • Buena Park, California
  • Cameron Park, California
  • Castro Valley, California
  • Davis, California

And 253 more locations — see the full list below.

Collaborators

National Cancer Institute (NCI)

Related conditions & keywords

Metastatic Clear Cell Renal Cell CarcinomaMetastatic Renal Cell CarcinomaStage IV Renal Cell Cancer AJCC v8

Frequently asked questions

What is a clinical trial?

A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.

Is it safe to participate?

Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.

Will I be compensated?

Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.

Will I receive a placebo instead of treatment?

When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.

Can I leave a trial if I change my mind?

Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.

How long does a clinical trial last?

Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.

Data: ClinicalTrials.gov · synced Oct 8, 2026 · Source of record for eligibility and locations

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Study locations

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Birmingham

Alabama

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Gilbert

Arizona

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Kingman

Arizona

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Tucson

Arizona

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Tucson

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Fort Smith

Arkansas

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Arroyo Grande

California

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Auburn

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Auburn

California

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And 378 more locations available.

Express your interest

Share your contact details and a study coordinator can follow up about screening.

Secure & Confidential

Your information is protected and will only be shared with the research team.

What participation can include

  • Study-related care provided by the research team
  • Close monitoring by medical professionals
  • Possible compensation for time and travel*
  • The option to withdraw at any time
  • Contributing to medical research that may help future patients

*Compensation varies by study. Confirm details with coordinator.

Typical next steps

  1. 1.Submit this form
  2. 2.Phone screening
  3. 3.In-person assessment if eligible
  4. 4.Begin participation

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Looking for Kidney Cancer Treatment in Birmingham?

Join others in Alabama exploring innovative treatment options through clinical research

Kidney Cancer Treatment Options in Birmingham, Alabama

If you're searching for Kidney Cancer treatment in Birmingham, participating in a clinical research study may provide access to innovative approaches under expert medical supervision. This study is actively recruiting participants in Birmingham, Gilbert, Kingman and surrounding areas.

Clinical trials offer participants the opportunity to receive cutting-edge treatments while contributing to medical research that may help future patients with Kidney Cancer. All study-related care is provided at no cost to participants.

Local Sites
3 locations in Alabama
Now Enrolling
Up to 364 participants
Quick Start
Screening available now

Why Consider a Clinical Trial for Kidney Cancer?

Potential Benefits

  • ✓Access to new treatment approaches before public availability
  • ✓Close monitoring by experienced medical professionals
  • ✓Study-related care provided at no cost
  • ✓Contribute to medical research for Kidney Cancer

What to Expect

  • →Initial screening to determine eligibility
  • →Regular check-ups and monitoring visits
  • →Possible compensation for time and travel
  • →You can withdraw at any time

Frequently Asked Questions About This Kidney Cancer Study

Important Clinical Trial Information

This information is provided for educational purposes and does not constitute medical advice. Clinical trial participation involves potential risks and benefits. Eligibility requirements apply and will be assessed during the screening process.

Study identifier: NCT04510597. For complete study details, visit ClinicalTrials.gov. Always consult with your healthcare provider before making decisions about your medical care or participating in clinical research.