For Healthcare Professionals

A Study of Nivolumab, Nivolumab Plus Ipilimumab, or Investigator's Choice Chemotherapy for the Treatment of Participants With Deficient Mismatch Repair (dMMR)/Microsatellite Instability High (MSI-H) Metastatic Colorectal Cancer (mCRC)


About the study

The main purpose of this study is to compare the clinical benefit, as measured by Progression-Free Survival (PFS), Objective Response Rate (ORR), and Overall Survival (OS), achieved by nivolumab in combination with ipilimumab or by nivolumab monotherapy in participants with Microsatellite Instability High (MSI-H) or Mismatch Repair Deficient (dMMR) metastatic colorectal cancer (mCRC). This study will also compare nivolumab plus ipilimumab combination vs chemotherapy for treatment of MSI-H/dMMR mCRC participants.

Who can take part

You may be eligible to participate in the study if you meet the following criteria:


  1. Histologically confirmed recurrent or metastatic colorectal cancer (CRC) irrespective of prior treatment history with chemotherapy and/or targeted agents not amenable to surgery (Applicable only during Part 1 enrollment of the study)
  2. Histologically confirmed recurrent or metastatic CRC with no prior treatment history with chemotherapy and/or targeted agents for metastatic disease and not amenable to surgery (Applicable during Part 2 enrollment of the study)
  3. Known tumor microsatellite instability-high (MSI-H) or mismatch repair deficient (dMMR) status per local standard of practice
  4. Eastern cooperative oncology group (ECOG) performance status lower than or equal to 1


  1. An active, known or suspected autoimmune disease
  2. History of interstitial lung disease or pneumonitis
  3. Known history of positive test for human immunodeficiency virus (HIV) or known acquired immunodeficiency syndrome (AIDS) Other protocol-defined inclusion/exclusion criteria apply
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Study Locations

Enter your ZIP code/Postal code/PIN code to locate study sites near you:

How to Apply

Contact the study center to learn if this study is a good match for you.
Phone iconCall 855-907-3286Email iconEmail Study Center

Study’s details


Metastatic Colorectal Cancer




Phase 3

Participants needed


Est. Completion Date

Jun 2026

Treatment type



Bristol-Myers Squibb identifier


Study number


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