Trial reportJournal of clinical oncology : official journal of the American Society of Clinical Oncology2020
Phase II Open-Label Study of Pembrolizumab in Treatment-Refractory, Microsatellite Instability-High/Mismatch Repair-Deficient Metastatic Colorectal Cancer: KEYNOTE-164.
Trial report in Journal of clinical oncology : official journal of the American Society of Clinical Oncology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 3 registered trials, which are not on this map. Cited by 570 papers, 6 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
A Phase II Study of Pembrolizumab (MK-3475) as Monotherapy in Subjects With Previously Treated Locally Advanced Unresectable or Metastatic (Stage IV) Mismatched Repair Deficient or Microsatellite Instability-High Colorectal Carcinoma (KEYNOTE-164)
Role of Circulating Tumor DNA (ctDNA) in Genetic Profiling and Clinical Outcomes for Advanced Biliary Tract Cancer (BTC) Patients - A Multicenter, Prospective, Observational Epidemiology Study
Role of Circulating Tumor DNA (ctDNA) in Genetic Profiling and Clinical Outcomes for Advanced Biliary Tract Cancer (BTC) Patients - Prospective, Observational, Epidemiology Study
Who cites it
570 citing papers in PubMed, 6 syntheses or guidelines pooled it.
- A Comprehensive Evaluation of the Effectiveness and Safety of Pembrolizumab for the Treatment of Metastatic Colorectal Cancer: A Systematic Review and Meta-Analysis.Current cancer drug targets · 2026Pooled it
- Prognostic utility of circulating tumor DNA assessment in immune checkpoint inhibitor-treated advanced non-small cell lung cancer: a systematic review and meta-analysis.Frontiers in immunology · 2026Pooled it
- Efficacy and safety of neoadjuvant PD-1 inhibitors or PD-L1 inhibitors combined with chemoradiotherapy for locally advanced rectal cancer: a systematic review and meta-analysis.Frontiers in pharmacology · 2025Pooled it
- Biomarkers to predict efficacy of immune checkpoint inhibitors in colorectal cancer patients: a systematic review and meta-analysis.Clinical and experimental medicine · 2024Pooled it
- A comprehensive overview of the molecular features and therapeutic targets in BRAFClinical and translational medicine · 2024Pooled it
- Efficacy and safety of PD-1/L1 inhibitors as first-line therapy for metastatic colorectal cancer: a meta-analysis.Frontiers in immunology · 2024Pooled it
- Association of HRD Score With Efficacy of Neoadjuvant Short-Course Radiotherapy Plus Sequential Chemoimmunotherapy in pMMR Locally Advanced Rectal Cancer.Cancer reports (Hoboken, N.J.) · 2026Trial
- Pembrolizumab monotherapy for microsatellite instability-high or mismatch repair deficient recurrent gliomas: results from the multicohort KEYNOTE-158 study.Journal of neuro-oncology · 2026Trial
- Neoadjuvant Fc-enhanced anti-CTLA-4 targets Tregs to augment androgen deprivation in high-risk prostate cancer: A randomized phase I trial.Cell reports. Medicine · 2026Trial
- Development of the rationale of a personalized cancer vaccine based on the in situ vaccine effect of radiotherapy: a mechanistic study of the POLARSTAR trial.Cancer immunology, immunotherapy : CII · 2025Trial
- Inflammation and mutational burden differentially associated with nivolumab or ipilimumab combination efficacy in colorectal cancer.Nature communications · 2025Trial
- Toripalimab, bevacizumab, and irinotecan in dMMR/MSI locally advanced colorectal cancer: First-stage results from a phase 1b/2 trial.Cell reports. Medicine · 2025Trial
- Efficacy and Safety of Nivolumab Monotherapy in Patients with High PD-1-Positive CD8/Treg Ratio in Advanced NSCLC and Gastric Cancer: A Phase II, Multicenter Study.Cancer research communications · 2025Trial
- Pembrolizumab in Patients of Chinese Descent with Microsatellite Instability-high/Mismatch Repair Deficient Advanced Solid Tumors: KEYNOTE-158 Final Analysis.Advances in therapy · 2025Trial
- Pembrolizumab in microsatellite-instability-high and mismatch-repair-deficient advanced solid tumors: updated results of the KEYNOTE-158 trial.Nature cancer · 2025Trial
- Iparomlimab (QL1604) in patients with microsatellite instability-high (MSI-H) or mismatch repair-deficient (dMMR) unresectable or metastatic solid tumors: a pivotal, single-arm, multicenter, phase II trial.Journal of hematology & oncology · 2024Trial
- Trial
- An international phase II trial and immune profiling of SBRT and atezolizumab in advanced pretreated colorectal cancer.Molecular cancer · 2024Trial
- Antibody-lectin chimeras for glyco-immune checkpoint blockade.Nature biotechnology · 2026Article
- Targeting WIP1 reprograms immunosuppressive tumor microenvironment to potentiate immunotherapy response in colorectal cancer.Cell death and differentiation · 2026Article
510 more citing papers are in PubMed but not listed here.
Corrections and comments
- Commented on by
Authors and funding
22 authors.
Funding
Abstract
purposeKEYNOTE-164 (NCT02460198) evaluated the antitumor activity of pembrolizumab in previously treated, metastatic, microsatellite instability-high/mismatch repair-deficient (MSI-H/dMMR) colorectal cancer (CRC).
methodsThis phase II open-label study involved 128 centers worldwide. Eligible patients were age ≥ 18 years and had metastatic MSI-H/dMMR CRC treated with ≥ 2 prior lines of standard therapy, including fluoropyrimidine, oxaliplatin, and irinotecan with or without anti-vascular endothelial growth factor/epidermal growth factor receptor monoclonal antibody (cohort A) or ≥ 1 prior line of therapy (cohort B). MSI-H/dMMR status was assessed locally. Patients received pembrolizumab 200 mg every 3 weeks for up to 2 years until progression, unacceptable toxicity, or withdrawal. The primary end point was objective response rate by RECIST version 1.1 by independent central review. Secondary end points were duration of response, progression-free survival (PFS), overall survival, safety, and tolerability.
resultsA total of 124 patients with MSI-H/dMMR CRC (61 in cohort A, 63 in cohort B) enrolled. At data cutoff, median follow-up was 31.3 months (range, 0.2-35.6 months) for cohort A and 24.2 months (range, 0.1-27.1 months) for cohort B. Objective response rate was 33% (95% CI, 21% to 46%) and 33% (95% CI, 22% to 46%), respectively, with median duration of response not reached in either cohort. Median PFS was 2.3 months (95% CI, 2.1 to 8.1 months) and 4.1 months (95% CI, 2.1 to 18.9 months). Median overall survival was 31.4 months (95% CI, 21.4 months to not reached) and not reached (95% CI, 19.2 months to not reached). Treatment-related grade 3-4 adverse events occurred in 10 patients (16%) in cohort A and 8 (13%) in cohort B, with the most common occurring in ≥ 2 patients being pancreatitis, fatigue, increased alanine aminotransferase, and increased lipase (2 patients each; 3%) in cohort A.
conclusionPembrolizumab is effective with a manageable safety profile in patients with MSI-H/dMMR CRC.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.