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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) (MATTERHORN)

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) (MATTERHORN)

Status
Unknown
Phases
Early Phase 1
Study type
Interventional
Source
REPEC
Registry ID
PER-094-20
Enrollment
900
Registered
2021-02-15
Start date
2020-11-12
Completion date
Unknown
Last updated
2026-02-03

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

Conditions

C16 Malignant neoplasm of stomach Malignant neoplasm of stomach

Interventions

None listed

Sponsors

AstraZeneca AB
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1Capable of giving signed informed consent which includes compliance with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol. 2Provision of signed and dated, written informed consent form prior to any mandatory study specific procedures, sampling, and analyses. 3Age =18 years at the time of screening. For patients aged T2 N0-3 M0 or T0-4 N1-3 M0] per AJCC 8th edition). GEJC includes Siewert* type 2 and 3 tumor. Siewert* type 1 tumor is also eligible as long as the patient is intended to be treated in the same way as for Siewert type 2 and 3 tumors. (a)Per the judgment of the Investigator, patient must be medically fit for treatment with neoadjuvant FLOT therapy prior to radical surgery. (b)At screening, complete surgical resection of the primary GC/GEJC must be deemed achievable, as assessed by a multidisciplinary evaluation, which must include a board certified GI surgeon (see Section 6.1.3 regarding surgical plan). (c)No prior anti-cancer therapy (eg, chemotherapy, radiation therapy, or chemoradiation therapy) for the current malignancy. 5World Health Organization (WHO)/ECOG performance status (PS) of 0 or 1 at enrollment

Exclusion criteria

Exclusion criteria: 1Patients with peritoneal dissemination (including tumor cells in peritoneal fluid) or distant metastasis 2Patients with adenosquamous cell carcinoma, squamous cell carcinoma, or GI stromal tumor 3History of allogeneic organ transplantation. 4Active or prior documented autoimmune or inflammatory disorders (including inflammatory bowel disease [eg, colitis or Crohn’s disease], diverticulitis [with the exception of diverticulosis], systemic lupus erythematosus, Sarcoidosis syndrome, or Wegener syndrome [granulomatosis with polyangiitis, Graves’ disease, rheumatoid arthritis, hypophysitis, uveitis, etc]). The following are exceptions to this criterion: (a)Patients with vitiligo or alopecia (b)Patients with hypothyroidism (eg, following Hashimoto syndrome) stable on hormone replacement (c)Any chronic skin condition that does not require systemic therapy (d)Patients without active disease in the last 5 years may be included but only after consultation with the Sponsor (e)Patients with celiac disease controlled by diet alone

Design outcomes

Primary

MeasureTime frame
EFS is defined as the time from randomization to the following, according to RECIST 1.1 per BICR assessment and/or locally by pathology testing: 1) Progression that precludes surgery or requires non-protocol therapy, 2) Local or distant recurrence or progression of disease, or 3) death due to any cause. NAME OF THE RESULT: To compare Arm A relative to Arm B on event-free survival (EFS) PERIOD OF TIME WHERE TE MEASUREMENT WILL BE CONDUCTED AND WHICH WILL ALLOW OBTAINING THE PRIMARY RESULT: Since randomization till progression disease

Secondary

MeasureTime frame
EFS is defined as the time from randomization to the following, according to RECIST 1.1 per BICR assessment and/or locally by pathology testing: 1) Progression that precludes surgery or requires non-protocol therapy, 2) Local or distant recurrence or progression of disease, or 3) death due to any cause. NAME OF THE RESULT: To compare Arm A relative to Arm B on event-free survival (EFS) PERIOD OF TIME WHERE TE MEASUREMENT WILL BE CONDUCTED AND WHICH WILL ALLOW OBTAINING THE PRIMARY RESULT: Since randomization till progression disease ;Overall survival is length of time from randomization until the date of death due to any cause. NAME OF THE RESULT: To compare Arm A relative to Arm B on overall survival (OS) PERIOD OF TIME WHERE TE MEASUREMENT WILL BE CONDUCTED AND WHICH WILL ALLOW OBTAINING THE PRIMARY RESULT: Since randomizarion till progression disease ;pCR rate is defined as the proportion of patients who have no residual viable tumor in the resected specimens and as determined by pathology review. NAME OF THE RESULT: To compare Arm A relative to Arm B on pathological complete response (pCR) rate PERIOD OF TIME WHERE TE MEASUREMENT WILL BE CONDUCTED AND WHICH WILL ALLOW OBTAINING THE PRIMARY RESULT: Since randomizarion till progression disease

Countries

Argentina, Belgium, Brazil, Canada, Chile, Denmark, France, Germany, Hungary, Japan, Korea South, Netherlands, Poland, Russian Federation, Spain, Taiwan, Turkey, United Kindgdom, United States

Outcome results

None listed

Source: REPEC (via WHO ICTRP) · Data processed: Feb 7, 2026