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Gastrointestinal NeoplasmsPhase 3NCT04592913

Assessing Durvalumab and FLOT Chemotherapy in Resectable Gastric and Gastroesophageal Junction Cancer

A Phase 3 study testing Durvalumab and FLOT chemotherapy in people with Gastrointestinal Neoplasms and Esophagogastric Junction, run by AstraZeneca at 156 sites in 20 countries.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
Search all trials

Trial summary

This is a Global Study of Neoadjuvant-Adjuvant Durvalumab or Placebo and FLOT Chemotherapy Followed by Adjuvant Durvalumab or Placebo in Patients with Resectable Gastric and Gastroesophageal Cancer (GC/GEJC) (MATTERHORN). Read more about this study

Who is it for?
Ages 18 to 200 years
What is being tested?
Durvalumab and FLOT chemotherapy
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
957 participants
Where
156 sitesin 20 countries
Study dates
17 Nov 2020to 27 Sep 2027
Phase
Phase 3
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 200 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Patients with histologically documented gastric or gastroesophageal junction adenocarcinoma with resectable disease (Stage II or higher per AJCC 8th edition).
  • Patients must undergo radical surgery.
  • No prior anti-cancer therapy for the current malignancy.
  • World Health Organization (WHO)/ECOG performance status of 0 or 1 at enrollment.
  • Adequate organ and marrow function.
  • Availability of tumor sample prior to study entry.
  • Must have a life expectancy of at least 24 weeks.

Who cannot join

  • Patients with peritoneal dissemination or distant metastasis.
  • Patients with adenosquamous cell carcinoma, squamous cell carcinoma, or GI stromal tumor.
  • Current or prior use of immunosuppressive medication within 14 days before the first dose of durvalumab.
  • Contra-indication to any of the study drugs.
  • History of allogeneic organ transplantation.

Trial locations and contacts

156 sites in 20 countries.

156 sites in 20 countries

Japan19 sites
  • Research Site

    Chūōku, 104-0045

  • Research Site

    Hidaka-shi, 350-1298

  • Research Site

    Hirakata-shi, 573-1191

  • Research Site

    Hiroshima, 730-8518

  • Research Site

    Kashiwa, 277-8577

  • Research Site

    Kitaadachi-gun, 362-0806

  • Research Site

    Kochi, 781-8555

  • Research Site

    Kurume-shi, 830-0011

  • Research Site

    Nagoya, 464-8681

  • Research Site

    Niigata, 951-8566

  • Research Site

    Ogaki-shi, 503-8502

  • Research Site

    Osaka, 534-0021

  • Research Site

    Osaka, 541-8567

  • Research Site

    Suita-shi, 565-0871

  • Research Site

    Sunto-gun, 411-8777

  • Research Site

    Tokyo, 135-8550

  • Research Site

    Toyoake-shi, 470-1192

  • Research Site

    Wakayama, 641-8510

  • Research Site

    Yokohama, 241-8515

Other trials in Japan

United States16 sites
  • Research Site

    Boston, Massachusetts, 02215

  • Research Site

    Dallas, Texas, 75390

  • Research Site

    Duarte, California, 91010

  • Research Site

    Fort Wayne, Indiana, 46804

  • Research Site

    Lancaster, Texas, 75216

  • Research Site

    Los Angeles, California, 90027

  • Research Site

    Los Angeles, California, 90095

  • Research Site

    Louisville, Kentucky, 40217

  • Research Site

    Nashville, Tennessee, 37203

  • Research Site

    New York, New York, 10065

  • Research Site

    Rochester, New York, 14642

  • Research Site

    Seattle, Washington, 98109

  • Research Site

    St. Petersburg, Florida, 33705

  • Research Site

    Sylmar, California, 91342

  • Research Site

    Tallahassee, Florida, 32308

  • Research Site

    West Palm Beach, Florida, 33401

Other trials in United States

France12 sites
  • Research Site

    Avignon, 84918

  • Research Site

    Besançon, 25030

  • Research Site

    Brest, 29609

  • Research Site

    Dijon, 21000

  • Research Site

    Lyon, 69373

  • Research Site

    Montpellier, 34298

  • Research Site

    Nantes, 44093

  • Research Site

    Nice, 06100

  • Research Site

    Paris, 75012

  • Research Site

    Paris, 75475

  • Research Site

    Paris, 75900

  • Research Site

    Rennes, 35033

Other trials in France

Germany12 sites
  • Research Site

    Berlin, 13353

  • Research Site

    Dresden, 01307

  • Research Site

    Frankfurt, 60488

  • Research Site

    Hamburg, 20246

  • Research Site

    Hamburg, 20249

  • Research Site

    Heidelberg, 69120

  • Research Site

    Heilbronn, 74078

  • Research Site

    Jena, 7743

  • Research Site

    Mainz Am Rhein, 55131

  • Research Site

    München, 81675

  • Research Site

    Schweinfurt, 97421

  • Research Site

    Tübingen, 72016

Other trials in Germany

Spain10 sites
  • Research Site

    Barcelona, 08025

  • Research Site

    Barcelona, 08035

  • Research Site

    Barcelona, 08908

  • Research Site

    Madrid, 28007

  • Research Site

    Madrid, 28034

  • Research Site

    Málaga, 29009

  • Research Site

    Ourense, 32005

  • Research Site

    Santander, 39008

  • Research Site

    Seville, 41013

  • Research Site

    Valencia, 46010

Other trials in Spain

Poland8 sites
  • Research Site

    Bialystok, 15-027

  • Research Site

    Gdansk, 80-952

  • Research Site

    Krakow, 30-688

  • Research Site

    Lodz, 93-513

  • Research Site

    Poznan, 60-569

  • Research Site

    Poznan, 61-866

  • Research Site

    Warsaw, 02-034

  • Research Site

    Warsaw, 04-141

Other trials in Poland

United Kingdom8 sites
  • Research Site

    Cambridge, CB2 0QQ

  • Research Site

    Dundee, DD1 9SY

  • Research Site

    Glasgow, G12 0YN

  • Research Site

    Leicester, LE2 7LZ

  • Research Site

    London, EC1A 7BE

  • Research Site

    Manchester, M20 4BX

  • Research Site

    Oxford, OX3 7LE

  • Research Site

    Surrey, SM2 5PT

Other trials in United Kingdom

Brazil7 sites
  • Research Site

    Barretos, 14784-400

  • Research Site

    Natal, 59075-740

  • Research Site

    Porto Alegre, 90035-903

  • Research Site

    Porto Alegre, 91350-200

  • Research Site

    Rio de Janeiro, 20231-050

  • Research Site

    São José do Rio Preto, 15090-000

  • Research Site

    São Paulo, 01246-000

Other trials in Brazil

Russia7 sites
  • Research Site

    Kaluga, 248007

  • Research Site

    Moscow, 111123

  • Research Site

    Moscow, 115478

  • Research Site

    Moscow, 125284

  • Research Site

    Novosibirsk, 630108

  • Research Site

    Obninsk, 249036

  • Research Site

    Saint Petersburg, 197089

Other trials in Russia

Argentina6 sites
  • Research Site

    Buenos Aires, C1431FWO

  • Research Site

    Ciudad Autonoma Buenos Aires, 1093

  • Research Site

    Ciudad de Buenos Aires, 1280

  • Research Site

    Ciudad de Buenos Aires, C1426ANZ

  • Research Site

    Rosario, 3101

  • Research Site

    Rosario, S2000DEJ

Other trials in Argentina

Canada6 sites
  • Research Site

    Edmonton, Alberta, t6G1Z2

  • Research Site

    Montreal, Quebec, H2X 0A9

  • Research Site

    Montreal, H3T 1E2

  • Research Site

    North York, Ontario, M2K 1E1

  • Research Site

    Oshawa, Ontario, L1G 2B9,

  • Research Site

    Toronto, Ontario, M5G 2M9

Other trials in Canada

Chile6 sites
  • Research Site

    La Serena, 1720430

  • Research Site

    Santiago, 7500653

  • Research Site

    Santiago, 7500921

  • Research Site

    Talca, 3461341

  • Research Site

    Temuco, 4800827

  • Research Site

    Temuco, 4810218

Other trials in Chile

South Korea6 sites
  • Research Site

    Hwasun-gun, 58128

  • Research Site

    Seongnam-si, 13620

  • Research Site

    Seoul, 03080

  • Research Site

    Seoul, 03722

  • Research Site

    Seoul, 06351

  • Research Site

    Seoul, 06591

Other trials in South Korea

Taiwan6 sites
  • Research Site

    Kaohsiung City, 807

  • Research Site

    Taichung, 40443

  • Research Site

    Tainan, 70403

  • Research Site

    Taipei, 10048

  • Research Site

    Taipei, 112

  • Research Site

    Taoyuan City, 333

Other trials in Taiwan

Turkey (Türkiye)6 sites
  • Research Site

    Adana, 01120

  • Research Site

    Ankara, 06340

  • Research Site

    Erzurum, 25240

  • Research Site

    Istanbul, 34098

  • Research Site

    Istanbul, 34457

  • Research Site

    Samsun, 55139

Other trials in Turkey (Türkiye)

Belgium5 sites
  • Research Site

    Charleroi, 6060

  • Research Site

    Edegem, 2650

  • Research Site

    Leuven, 3000

  • Research Site

    Liège, 4000

  • Research Site

    Roeselare, 8800

Other trials in Belgium

Hungary5 sites
  • Research Site

    Budapest, 1122

  • Research Site

    Győr, 9024

  • Research Site

    Kecskemét, 6000

  • Research Site

    Szekszárd, 7100

  • Research Site

    Szolnok, 5004

Other trials in Hungary

Peru5 sites
  • Research Site

    Bellavista, CALLAO 2

  • Research Site

    Lima, LIMA 29

  • Research Site

    Lima, Lima 32

  • Research Site

    Lima, LIMA 34

  • Research Site

    San Isidro, 27

Other trials in Peru

Denmark3 sites
  • Research Site

    Aalborg, 9000

  • Research Site

    København Ø, 2100

  • Research Site

    Odense, 5000

Other trials in Denmark

Netherlands3 sites
  • Research Site

    Amsterdam, 1066 CX

  • Research Site

    Eindhoven, 5623EJ

  • Research Site

    Rotterdam, 3015GD

Other trials in Netherlands

About this study

Official title: A Randomized, Double-blind, Placebo-controlled, Phase III Study of Neoadjuvant-Adjuvant Durvalumab and FLOT Chemotherapy Followed by Adjuvant Durvalumab in Patients With Resectable Gastric and Gastroesophageal Junction Cancer (GC/GEJC)

This is a Global Study of Neoadjuvant-Adjuvant Durvalumab or Placebo and FLOT Chemotherapy Followed by Adjuvant Durvalumab or Placebo in Patients with Resectable Gastric and Gastroesophageal Cancer (GC/GEJC) (MATTERHORN).

Read the detailed description

This study investigates treatment of durvalumab or placebo therapy combined with FLOT chemotherapy (flurouroacil + leucovorin + oxaliplatin + docetaxel) given before surgery (neoadjuvant) and durvalumab or placebo therapy combined with FLOT chemotherapy after surgery (adjuvant), will work and be safe for the treatment of resectable (removable by surgery) gastric or gastroesophageal cancer, and also to better understand the studied disease and associated health problems.

Being tested
Durvalumab, FLOT chemotherapy
Medical subject headings
Gastrointestinal Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • DurvalumabDrug

    Human monoclonal antibody

  • FLOT chemotherapyDrug

    A combination treatment made up of flurouroacil + leucovorin + oxaliplatin + docetaxel

Study groups in NCT04592913
Study groupRoleWhat they receive
Arm BPlacebo comparatorplacebo product and FLOT chemotherapy
Receives: Drug: FLOT chemotherapy
Arm AExperimentalDurvalumab and FLOT chemotherapy
Receives: Drug: Durvalumab; Drug: FLOT chemotherapy

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Event-free survival (EFS)

    EFS is the time from date of randomization until the date of disease progression or death.

    Measured: Up to 5 years

Secondary outcomes (2)
  1. To compare Arm A relative to Arm B on overall survival (OS)

    Overall survival is length of time from randomization until the date of death due to any cause.

    Measured: Up to 5 years

  2. To compare Arm A relative to Arm B on pathological complete response (pCR) rate

    pCR rate is the proportion of patients who have no residual viable tumor in the resected specimens.

    Measured: Up to 5 years

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted19 Oct 2020
  2. Study start17 Nov 2020
  3. Primary completion20 Dec 2024
  4. Study completion27 Sep 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Model description
Randomized, Double-blind, Placebo-controlled study
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
957 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04592913
Sponsor's protocol ID
D910GC00001
Other IDs
2019-001555-40, 2019
Status last verified
Dec 2025
First submitted
26 Aug 2020
Last updated
24 Dec 2025
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Yes: Qualified researchers can request access to anonymized individual patient-level data from AstraZeneca group of companies sponsored clinical trials via the request portal. All request will be evaluated as per the AZ disclosure commitment: https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure. Yes, indicates that AZ are accepting requests for IPD, but this does not mean all requests will be shared.

Publications

  • Janjigian YY, Al-Batran SE, Wainberg ZA, Muro K, Molena D, Van Cutsem E, Hyung WJ, Wyrwicz L, Oh DY, Omori T, Moehler M, Bragagnoli AC, Garbaos G, Liberman M, Miron MLL, Smyth EC, Cheng LY, Robbins SH, Valeri N, Xynos I, Tabernero J; MATTERHORN investigators. Perioperative durvalumab plus fluorouracil, leucovorin, oxaliplatin, and docetaxel for resectable gastric and gastro-oesophageal junction adenocarcinoma (MATTERHORN): final results of overall survival and event-free survival by pathological response in a global, randomised, double-blind, placebo-controlled, multicentre, phase 3 trial. Lancet. 2026 Sep 9:S0140-6736(26)01254-7. doi: 10.1016/S0140-6736(26)01254-7. Online ahead of print.

    PubMed 42716074
  • Janjigian YY, Al-Batran SE, Wainberg ZA, Muro K, Molena D, Van Cutsem E, Hyung WJ, Wyrwicz L, Oh DY, Omori T, Moehler M, Garrido M, Oliveira SCS, Liberman M, Oliden VC, Smyth EC, Stein A, Bilici M, Alvarenga ML, Kozlov V, Rivera F, Kawazoe A, Serrano O, Heilbron E, Negro A, Kurland JF, Tabernero J; MATTERHORN Investigators. Perioperative Durvalumab in Gastric and Gastroesophageal Junction Cancer. N Engl J Med. 2025 Jul 17;393(3):217-230. doi: 10.1056/NEJMoa2503701. Epub 2025 Jun 1.

    PubMed 40454643
  • Chang X, Ge X, Zhang Y, Xue X. The current management and biomarkers of immunotherapy in advanced gastric cancer. Medicine (Baltimore). 2022 May 27;101(21):e29304. doi: 10.1097/MD.0000000000029304.

    PubMed 35623069
  • Janjigian YY, Van Cutsem E, Muro K, Wainberg Z, Al-Batran SE, Hyung WJ, Molena D, Marcovitz M, Ruscica D, Robbins SH, Negro A, Tabernero J. MATTERHORN: phase III study of durvalumab plus FLOT chemotherapy in resectable gastric/gastroesophageal junction cancer. Future Oncol. 2022 Jun;18(20):2465-2473. doi: 10.2217/fon-2022-0093. Epub 2022 May 10.

    PubMed 35535555
  • Cowzer D, Janjigian YY. Top advances in esophageal/gastroesophageal junction cancers in 2021. Cancer. 2022 May 15;128(10):1894-1899. doi: 10.1002/cncr.34140. Epub 2022 Feb 18. No abstract available.

    PubMed 35179774

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing Durvalumab and FLOT chemotherapy in people with Gastrointestinal Neoplasms and Esophagogastric Junction, run by AstraZeneca at 156 sites in 20 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 7 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: under way, not looking for participants, as of the sponsor's last update on 24 Dec 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 156 sites in Japan, United States, France, Germany, Spain and 15 more countries. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Event-free survival (EFS) (time frame: Up to 5 years). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04592913, which also lists 5 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 24 Dec 2025.

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