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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)

A Randomized, Double-blind, Placebo-controlled, Phase III Study of Neoadjuvant-Adjuvant Durvalumab and FLOT Chemotherapy Followed by Adjuvant Durvalumab or Placebo in Patients with Resectable Gastric and Gastroesophageal Cancer (GC/GEJC) (MATTERHORN) - MATTERHORN

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTR
Registry ID
EUCTR2019-001555-40-HU
Enrollment
900
Registered
2020-10-05
Start date
2020-12-18
Completion date
Unknown
Last updated
2025-01-27

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Histologically documented gastric or gastroesophageal junction adenocarcinoma with resectable disease (Stage II or higher per AJCC 8th edition).

Interventions

Product Name: Durvalumab Product Code: MEDI4736 Pharmaceutical Form: Concentrate for solution for infusion INN or Proposed INN: durvalumab CAS Number: 1428935-60-7 Current Sponsor code: MEDI4736 Conce

Sponsors

AstraZeneca AB
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Patients with histologically documented gastric or gastroesophageal junction adenocarcinoma with resectable disease (Stage II or higher per AJCC 8th edition). Patients must have undergo radical surgery. No prior anti-cancer therapy for the current malignancy. World Health Organization (WHO)/ECOG PS 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 Are the trial subjects under 18? no Number of subjects for this age range: F.1.2 Adults (18-64 years) yes F.1.2.1 Number of subjects for this age range 450 F.1.3 Elderly (>=65 years) yes F.1.3.1 Number of subjects for this age range 450

Exclusion criteria

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

Design outcomes

Primary

MeasureTime frame
Main Objective: To compare Arm A relative to Arm B on event-free survival (EFS);Secondary Objective: To compare Arm A relative to Arm B on overall survival (OS) To compare Arm A relative to Arm B on pathological complete response (pCR) rate To compare Arm A relative to Arm B on the proportion of patients who undergo gastrectomy or gastrophagectomy To compare Arm A relative to Arm B on the rate of complete resection (R0) To compare Arm A relative to Arm B on metastasis-free survival (MFS) and disease-specific survival (DSS) To compare Arm A relative to Arm B on disease-free survival in patients who undergo R0 resection surgery To compare Arm A relative to Arm B on EFS24, EFS36, OS24, OS36, DFS24, and DFS36 To compare Arm A relative to Arm B on efficacy endpoints by PD-L1 expression To compare Arm A relative to Arm B on disease-related symptoms, impacts, and HRQoL To evaluate PK of Arm A and Arm B To assess the immunogenicity of Arm A and Arm B;Primary end point(s): EFS (event free survival);Timepoint(s) of evaluation of this end point: EFS will be analyzed at the end of the study using a stratified log-rank test adjusting for the stratification factors of geographic region, clinical lymph node status, and PD-L1 expression status.

Secondary

MeasureTime frame
Secondary end point(s): OS, pCR rate Surgery rate R0 resection rate MFS, DSS, DFS EFS24, EFS36, OS24, OS36,DFS24, DFS36 EORTC QLQ-C30, QLQ-STO22, and IL38;Timepoint(s) of evaluation of this end point: The primary and key secondary endpoints will be evaluated at an interim analysis and all endpoints will be evaluated at the final analysis.

Countries

Argentina, Australia, Belgium, Brazil, Canada, Chile, Denmark, France, Germany, Hungary, Japan, Korea, Democratic People's Republic of, Netherlands, Poland, United Kingdom, United States, Vietnam

Contacts

Public ContactStudy Information Center

AstraZeneca Clinical

information.center@astrazeneca.com1877240-9479

Outcome results

None listed

Source: EU CTR (via WHO ICTRP) · Data processed: Feb 4, 2026