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) (CheckMate 8HW)

September 22, 2025 updated by: Bristol-Myers Squibb

A Phase 3 Randomized Clinical Trial of Nivolumab Alone, Nivolumab in Combination With Ipilimumab, or Investigator's Choice Chemotherapy in Participants With Microsatellite Instability High (MSI-H) or Mismatch Repair Deficient (dMMR) Metastatic Colorectal Cancer

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.

Study Overview

Study Type

Interventional

Enrollment (Actual)

839

Phase

  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

      • Buenos Aires, Argentina, 1093
        • Local Institution - 0084
      • CABA, Argentina, 1199
        • Local Institution - 0100
      • CABA, Argentina, 1426
        • Local Institution - 0072
    • Buenos Aires
      • Ciudad Autonoma Beunos Aires, Buenos Aires, Argentina, 1431
        • Local Institution - 0073
    • Río Negro Province
      • Viedma, Río Negro Province, Argentina, 8500
        • Local Institution - 0074
    • New South Wales
      • Westmead, New South Wales, Australia, 2145
        • Local Institution - 0019
    • Queensland
      • Woolloongabba, Queensland, Australia, 4102
        • Local Institution - 0053
    • South Australia
      • Elizabeth Vale, South Australia, Australia, 5112
        • Local Institution - 0018
    • Victoria
      • Clayton, Victoria, Australia, 3168
        • Local Institution - 0041
      • Heidelberg, Victoria, Australia, 3084
        • Local Institution - 0017
      • Graz, Austria, 8036
        • Local Institution - 0064
      • Linz, Austria, 4010
        • Local Institution - 0068
      • Salzburg, Austria, 5020
        • Local Institution - 0120
      • Vienna, Austria, 1090
        • Local Institution - 0065
      • Wiener Neustadt, Austria, 2700
        • Local Institution - 0067
      • Leuven, Belgium, 3000
        • Local Institution - 0024
    • Antwerpen
      • Bonheiden, Antwerpen, Belgium, 2820
        • Local Institution - 0045
    • Bruxelles-Capitale, Région de
      • Anderlecht, Bruxelles-Capitale, Région de, Belgium, 1070
        • Local Institution - 0025
      • Rio de Janeiro, Brazil, 20231-050
        • Local Institution - 0199
      • São Paulo, Brazil, 01246-000
        • Local Institution - 0193
    • Minas Gerais
      • Ipatinga, Minas Gerais, Brazil, 35160-158
        • Local Institution - 0096
    • Rio Grande do Norte
      • Natal, Rio Grande do Norte, Brazil, 59075-740
        • Local Institution - 0200
    • Rio Grande do Sul
      • Porto Alegre, Rio Grande do Sul, Brazil, 91350-200
        • Local Institution - 0192
    • São Paulo
      • Barretos, São Paulo, Brazil, 14780-070
        • Local Institution - 0102
      • São José do Rio Preto, São Paulo, Brazil, 15090000
        • Local Institution - 0094
      • São Paulo, São Paulo, Brazil, 01509-010
        • Local Institution - 0095
    • Alberta
      • Edmonton, Alberta, Canada, T6G 1Z2
        • Local Institution - 0011
    • British Columbia
      • Vancouver, British Columbia, Canada, V5Z 4E6
        • Local Institution - 0039
    • Ontario
      • Toronto, Ontario, Canada, M5G 1X5
        • Local Institution - 0013
    • Quebec
      • Montreal, Quebec, Canada, H2X 3E4
        • Local Institution - 0016
      • Sherbrooke, Quebec, Canada, J1H 5N4
        • Local Institution - 0015
    • Santiago Metropolitan
      • Independencia, Santiago Metropolitan, Chile
        • Local Institution - 0070
      • Santiago, Santiago Metropolitan, Chile, 7500921
        • Local Institution - 0071
      • Santiago, Santiago Metropolitan, Chile, 8320000
        • Local Institution - 0069
    • Anhui
      • Hefei, Anhui, China, 230061
        • Local Institution - 0146
    • Fujian
      • Xiamen, Fujian, China, 361003
        • Local Institution - 0163
      • Zhangzhou, Fujian, China, 363000
        • Local Institution - 0207
    • Gansu
      • Lanzhou, Gansu, China, 730030
        • Local Institution - 0211
    • Guangdong
      • Foshan, Guangdong, China, 528000
        • Local Institution - 0158
      • Guangzhou, Guangdong, China, 510080
        • Local Institution - 0167
      • Guangzhou, Guangdong, China, 510095
        • Local Institution - 0153
      • Guangzhou, Guangdong, China, 510655
        • Local Institution - 0149
    • Guangxi
      • Nanning, Guangxi, China, 530000
        • Local Institution - 0160
      • Nanning, Guangxi, China, 530021
        • Local Institution - 0196
    • Heilongjiang
      • Harbin, Heilongjiang, China, 150040
        • Local Institution - 0180
    • Henan
      • Zhengzhou, Henan, China, 450052
        • Local Institution - 0181
    • Hunan
      • Changsha, Hunan, China, 410013
        • Local Institution - 0197
    • Jiangsu
      • Changzhou, Jiangsu, China, 213003
        • Local Institution - 0145
    • Jiangxi
      • Nanchang, Jiangxi, China, 330006
        • Local Institution - 0151
    • Jilin
      • Changchun, Jilin, China, 130021
        • Local Institution - 0164
    • Liaoning
      • Shenyang, Liaoning, China, 110042
        • Local Institution - 0162
    • Shaanxi
      • Xi'an, Shaanxi, China, 710126
        • Local Institution - 0188
    • Shandong
      • Jinan, Shandong, China, 250117
        • Local Institution - 0210
      • Linyi, Shandong, China, 276001
        • Local Institution - 0212
      • Qingdao, Shandong, China, 266061
        • Local Institution - 0154
      • Yantai, Shandong, China, 264000
        • Local Institution - 0165
    • Shanghai Municipality
      • Shanghai, Shanghai Municipality, China, 200080
        • Local Institution - 0143
      • Shanghai, Shanghai Municipality, China, 200120
        • Local Institution - 0131
      • Shanghai, Shanghai Municipality, China, 200131
        • Local Institution - 0221
    • Yunnan
      • Kunming, Yunnan, China, 650106
        • Local Institution - 0195
    • Zhejiang
      • Hangzhou, Zhejiang, China, 310009
        • Local Institution - 0137
      • Ningbo, Zhejiang, China, 315041
        • Local Institution - 0206
      • Brno, Czechia, 656 53
        • Local Institution - 0087
      • Hradec Králové, Czechia, 500 05
        • Local Institution - 0085
      • Nový Jičín, Czechia, 741 01
        • Local Institution - 0088
      • Olomouc, Czechia, 779 00
        • Local Institution - 0086
      • Herlev, Denmark, 2730
        • Local Institution - 0038
      • Vejle, Denmark, 7100
        • Local Institution - 0036
      • Bayonne, France, 64109
        • Local Institution - 0186
      • Besançon, France, 25030
        • Local Institution - 0028
      • Lyon, France, 69008
        • Local Institution - 0183
      • Lyon, France, 69373
        • Local Institution - 0029
      • Marseille, France, 13005
        • Local Institution - 0066
      • Montpellier, France, 34298
        • Local Institution - 0030
      • Nantes, France, 44093
        • Local Institution - 0032
      • Paris, France, 75012
        • Local Institution - 0027
      • Pessac, France, 33604
        • Local Institution - 0061
      • Poitiers, France, 86000
        • Local Institution - 0031
      • Strasbourg, France, 67200
        • Local Institution - 0184
      • Toulouse, France, 31059
        • Local Institution - 0040
    • Haute-Vienne
      • Limoges, Haute-Vienne, France, 87042
        • Local Institution - 0176
    • Nord
      • Lille, Nord, France, 59000
        • Local Institution - 0138
      • Dresden, Germany, 01307
        • Local Institution - 0042
      • Essen, Germany, 45122
        • Local Institution - 0007
      • Hamburg, Germany, 20249
        • Local Institution - 0043
      • Hamburg, Germany, 22763
        • Local Institution - 0117
      • Hanover, Germany, 30625
        • Local Institution - 0008
      • Heidelberg, Germany, 69120
        • Local Institution - 0009
      • Marburg, Germany, 35043
        • Local Institution - 0044
      • Munich, Germany, 81377
        • Local Institution - 0010
      • Athens, Greece, 11525
        • Local Institution - 0222
      • Athens, Greece, 11528
        • Local Institution - 0123
      • Cholargós, Greece, 15562
        • Local Institution - 0124
      • Heraklion, Greece, 71110
        • Local Institution - 0125
      • Ioannina, Greece, 45500
        • Local Institution - 0126
      • Dublin, Ireland
        • Local Institution - 0022
      • Limerick, Ireland, V94 F858
        • Local Institution - 0026
    • Dublin
      • Dublin, Dublin, Ireland
        • Local Institution - 0091
      • Catania, Italy, 95122
        • Local Institution - 0055
      • Genova, Italy, 16132
        • Local Institution - 0003
      • Milan, Italy, 20162
        • Local Institution - 0001
      • Napoli, Italy, 80131
        • Local Institution - 0004
      • Padua, Italy, 35128
        • Local Institution - 0002
      • Roma, Italy, 00168
        • Local Institution - 0054
      • Osaka, Japan, 540-0006
        • Local Institution - 0114
    • Aichi-ken
      • Nagoya, Aichi-ken, Japan, 4648681
        • Local Institution - 0109
    • Chiba
      • Chiba, Chiba, Japan, 260-8717
        • Local Institution - 0112
      • Kashiwa-shi, Chiba, Japan, 2778577
        • Local Institution - 0107
    • Ehime
      • Matsuyama, Ehime, Japan, 791-0280
        • Local Institution - 0132
    • Fukuoka
      • Fukuoka, Fukuoka, Japan, 8111395
        • Local Institution - 0116
    • Hokkaido
      • Sapporo, Hokkaido, Japan, 0608648
        • Local Institution - 0174
    • Ishikawa-ken
      • Kanazawa, Ishikawa-ken, Japan, 9208641
        • Local Institution - 0128
    • Kanagawa
      • Kawasaki, Kanagawa, Japan, 216-8511
        • Local Institution - 0111
      • Yokohama, Kanagawa, Japan, 241-8515
        • Local Institution - 0175
    • Kumamoto
      • Kumamoto, Kumamoto, Japan, 8608556
        • Local Institution - 0133
    • Miyagi
      • Ōsaki, Miyagi, Japan, 9896183
        • Local Institution - 0189
    • Okayama-ken
      • Kurashiki, Okayama-ken, Japan, 7108602
        • Local Institution - 0177
    • Osaka
      • Suita-shi, Osaka, Japan, 565-0871
        • Local Institution - 0115
    • Saitama
      • Hidaka, Saitama, Japan, 350-1298
        • Local Institution - 0187
      • Kitaadachigun, Saitama, Japan, 362-0806
        • Local Institution - 0110
    • Shizuoka
      • Sunto-gun, Shizuoka, Japan, 4118777
        • Local Institution - 0108
    • Tokyo
      • Chuo-ku, Tokyo, Japan, 1040045
        • Local Institution - 0118
      • Koto-ku, Tokyo, Japan, 135-8550
        • Local Institution - 0113
      • Minato-ku, Tokyo, Japan, 1058470
        • Local Institution - 0129
      • Utrecht, Netherlands, 3584 CX
        • Local Institution - 0050
    • North Holland
      • Amsterdam, North Holland, Netherlands, 1066 CX
        • Local Institution - 0052
      • Amsterdam, North Holland, Netherlands, 1081 HV
        • Local Institution - 0051
      • Bergen, Norway, 5021
        • Local Institution - 0033
      • Lorenskog, Norway, 1478
        • Local Institution - 0034
      • Oslo, Norway, 0450
        • Local Institution - 0035
      • Rio Piedras, Puerto Rico, 00935
        • Local Institution - 0058
      • Brasov, Romania, 002200
        • Local Institution - 0168
      • Bucharest, Romania, 022328
        • Local Institution - 0080
      • Iași, Romania, 700483
        • Local Institution - 0205
      • Suceava, Romania, 720237
        • Local Institution - 0089
    • Cluj
      • Cluj-Napoca, Cluj, Romania, 400015
        • Local Institution - 0076
    • Dolj
      • Craiova, Dolj, Romania, 200542
        • Local Institution - 0081
      • A Coruña, Spain, 15006
        • Local Institution - 0173
      • Barcelona, Spain, 08035
        • Local Institution - 0006
      • Madrid, Spain, 28041
        • Local Institution - 0005
      • Málaga, Spain, 29010
        • Local Institution - 0172
      • Seville, Spain, 41013
        • Local Institution - 0063
      • Valencia, Spain, 46014
        • Local Institution - 0171
    • Barcelona [Barcelona]
      • Badalona, Barcelona [Barcelona], Spain, 08916
        • Local Institution - 0056
      • Adana, Turkey (Türkiye), 01060
        • Local Institution - 0092
      • Istanbul, Turkey (Türkiye), 34300
        • Local Institution - 0101
      • London, United Kingdom, EC1A 7BE
        • Local Institution - 0127
      • Oxford, United Kingdom, OX3 7LE
        • Local Institution - 0049
    • California
      • Los Angeles, California, United States, 90033
        • Local Institution - 0059
      • Sacramento, California, United States, 95817
        • Local Institution - 0130
    • Colorado
      • Denver, Colorado, United States, 80218
        • Local Institution - 0103
    • Illinois
      • Arlington Heights, Illinois, United States, 60005
        • Local Institution - 0119
    • New York
      • New York, New York, United States, 10065
        • Local Institution - 0060
    • Oregon
      • Portland, Oregon, United States, 97227
        • Local Institution - 0105
    • Pennsylvania
      • Pittsburgh, Pennsylvania, United States, 15232
        • Local Institution - 0121
    • Texas
      • Dallas, Texas, United States, 75246
        • Local Institution - 0106
    • Virginia
      • Roanoke, Virginia, United States, 24014
        • Local Institution - 0104

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • 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)
  • 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)
  • Known tumor microsatellite instability-high (MSI-H) or mismatch repair deficient (dMMR) status per local standard of practice
  • Eastern cooperative oncology group (ECOG) performance status lower than or equal to 1

Exclusion Criteria:

  • An active, known or suspected autoimmune disease
  • History of interstitial lung disease or pneumonitis
  • Known history of positive test for human immunodeficiency virus (HIV) or known acquired immunodeficiency syndrome (AIDS)

Other protocol-defined inclusion/exclusion criteria apply

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Arm A: Nivolumab Monotherapy
Specified dose on specified days
Experimental: Arm B: Nivolumab + Ipilimumab Combination
Specified dose on specified days
Specified dose on specified days
Active Comparator: Arm C: Investigator's Choice Chemotherapy
Participants in Arm C would be allowed to receive Nivolumab + Ipilimumab if they progress
Specified dose on specified days
Specified dose on specified days
Specified dose on specified days
Specified dose on specified days
Specified dose on specified days
Specified dose on specified days

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Progression-free Survival (PFS) by Blinded Independent Review Center (BICR) - Arm B vs. Arm A All Lines Centrally Confirmed MSI-H/dMMR
Time Frame: From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months)
BICR-assessed Progression-free survival (PFS) is defined as the time from the randomization date to the date of first objectively documented disease progression per RECIST 1.1 (i.e, radiologic) or death due to any cause, whichever occurs first.
From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months)
Progression-free Survival (PFS) by Blinded Independent Review Center (BICR) - Arm B vs. Arm C 1L Participants Centrally Confirmed MSI-H/dMMR
Time Frame: From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 32 months)
BICR-assessed Progression-free survival (PFS) is defined as the time from the randomization date to the date of first objectively documented disease progression per RECIST 1.1 (i.e, radiologic) or death due to any cause, whichever occurs first.
From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 32 months)

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Progression-free Survival (PFS) by Blinded Independent Review Center (BICR) - 1L Participants
Time Frame: From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first
BICR-assessed Progression-free survival (PFS) is defined as the time from the randomization date to the date of first objectively documented disease progression per RECIST 1.1 (i.e, radiologic) or death due to any cause, whichever occurs first.
From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first
Progression-free Survival (PFS) by Blinded Independent Review Center (BICR) - Arm B vs. Arm A All Randomized Participants
Time Frame: From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months)
BICR-assessed Progression-free survival (PFS) is defined as the time from the randomization date to the date of first objectively documented disease progression per RECIST 1.1 (i.e, radiologic) or death due to any cause, whichever occurs first.
From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months)
Progression-free Survival (PFS) by Blinded Independent Review Center (BICR) - 1L Randomized Participants
Time Frame: From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months)
BICR-assessed Progression-free survival (PFS) is defined as the time from the randomization date to the date of first objectively documented disease progression per RECIST 1.1 (i.e, radiologic) or death due to any cause, whichever occurs first.
From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months)
Progression-free Survival (PFS) by Blinded Independent Review Center (BICR) - Crossover and First Line Arm
Time Frame: From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first
BICR-assessed Progression-free survival (PFS) is defined as the time from the randomization date to the date of first objectively documented disease progression per RECIST 1.1 (i.e, radiologic) or death due to any cause, whichever occurs first.
From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first
Progression-free Survival (PFS) by Blinded Independent Review Center (BICR) by Polymerase Chain Reaction (PCR) - Arm B vs. Arm A
Time Frame: From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months)
BICR-assessed Progression-free survival (PFS) is defined as the time from the randomization date to the date of first objectively documented disease progression per RECIST 1.1 (i.e, radiologic) or death due to any cause, whichever occurs first.
From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months)
Progression-free Survival (PFS) by Blinded Independent Review Center (BICR) by Immunohistochemistry (IHC) - Arm B vs. Arm A
Time Frame: From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months)
BICR-assessed Progression-free survival (PFS) is defined as the time from the randomization date to the date of first objectively documented disease progression per RECIST 1.1 (i.e, radiologic) or death due to any cause, whichever occurs first.
From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months)
Progression-free Survival (PFS) by Blinded Independent Review Center (BICR) by Polymerase Chain Reaction (PCR) - Arm B vs. Arm C
Time Frame: From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 32 months)
BICR-assessed Progression-free survival (PFS) is defined as the time from the randomization date to the date of first objectively documented disease progression per RECIST 1.1 (i.e, radiologic) or death due to any cause, whichever occurs first.
From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 32 months)
Progression-free Survival (PFS) by Blinded Independent Review Center (BICR) by Immunohistochemistry (IHC) - Arm B vs. Arm C
Time Frame: From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 32 months)
BICR-assessed Progression-free survival (PFS) is defined as the time from the randomization date to the date of first objectively documented disease progression per RECIST 1.1 (i.e, radiologic) or death due to any cause, whichever occurs first.
From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 32 months)
Progression-free Survival (PFS) by Investigator- Arm B vs. Arm A All Lines
Time Frame: From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months)
Investigator-assessed Progression-free survival (PFS) is defined as the time from the randomization date to the date of first objectively documented disease progression per RECIST 1.1 (i.e, radiologic) or death due to any cause, whichever occurs first.
From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months)
Progression-free Survival (PFS) by Investigator - Arm A and Arm B All Lines With dMMR/MSI-H mCRC
Time Frame: From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months)
Investigator-assessed Progression-free survival (PFS) is defined as the time from the randomization date to the date of first objectively documented disease progression per RECIST 1.1 (i.e, radiologic) or death due to any cause, whichever occurs first.
From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months)
Progression-free Survival (PFS) by Investigator - 1L Participants
Time Frame: From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months for arm A and arm B; up to 32 months for arm C)
Investigator-assessed Progression-free survival (PFS) is defined as the time from the randomization date to the date of first objectively documented disease progression per RECIST 1.1 (i.e, radiologic) or death due to any cause, whichever occurs first.
From date of randomization to the date of first objectively documented disease progression or death due to any cause, whichever occurs first (Up to approximately 60 months for arm A and arm B; up to 32 months for arm C)
Objective Response Rate (ORR) by Blinded Independent Review Center (BICR) - Arm A and Arm B All Lines With dMMR/MSI-H mCRC
Time Frame: From date of randomization to the date of the initial objectively documented tumor progression, or the date of initiation of subsequent therapy, whichever occurs first (Up to approximately 60 months)

Objective Response Rate (ORR) is defined as the percentage of all randomized participants whose best overall response is either confirmed complete response (CR) or confirmed partial response (PR).

CR= Disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to < 10 mm.

PR= At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.

Progressive disease (PD)=At least a 20% increase in the sum of diameters of target lesions. the sum must also demonstrate an absolute increase of at least 5 mm.

From date of randomization to the date of the initial objectively documented tumor progression, or the date of initiation of subsequent therapy, whichever occurs first (Up to approximately 60 months)
Objective Response Rate (ORR) by Blinded Independent Review Center (BICR) - 1L Participants
Time Frame: From date of randomization to the date of the initial objectively documented tumor progression, or the date of initiation of subsequent therapy, whichever occurs first (Up to approximately 60 months)

Objective Response Rate (ORR) is defined as the percentage of all randomized participants whose best overall response is either confirmed complete response (CR) or confirmed partial response (PR).

CR= Disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to < 10 mm.

PR= At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.

Progressive disease (PD)=At least a 20% increase in the sum of diameters of target lesions. the sum must also demonstrate an absolute increase of at least 5 mm.

From date of randomization to the date of the initial objectively documented tumor progression, or the date of initiation of subsequent therapy, whichever occurs first (Up to approximately 60 months)
Overall Survival (OS) - Arm B vs. Arm A All Lines With dMMR/MSI-H mCRC
Time Frame: From randomization to the date of death due to any cause (Up to approximately 60 months)
Overall Survival (OS) is defined as the time from the randomization date to the date of death due to any cause. A participant who has not died will be censored at last known date alive.
From randomization to the date of death due to any cause (Up to approximately 60 months)
Overall Survival (OS) - 1L Participants
Time Frame: From randomization to the date of death due to any cause
Overall Survival (OS) is defined as the time from the randomization date to the date of death due to any cause. A participant who has not died will be censored at last known date alive.
From randomization to the date of death due to any cause

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Study Director: Bristol-Myers Squibb, Bristol-Myers Squibb

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

August 5, 2019

Primary Completion (Actual)

August 28, 2024

Study Completion (Estimated)

June 10, 2026

Study Registration Dates

First Submitted

July 2, 2019

First Submitted That Met QC Criteria

July 2, 2019

First Posted (Actual)

July 5, 2019

Study Record Updates

Last Update Posted (Estimated)

October 3, 2025

Last Update Submitted That Met QC Criteria

September 22, 2025

Last Verified

September 1, 2025

More Information

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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