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IMFINZI (durvalumab) UK Prescribing Information
IMJUDO (tremelimumab) ▼ UK Prescribing Information
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MATTERHORN Home

 

Extending the boundaries

of curative-intent treatment – with evidence of longer survival vs. standard perioperative chemotherapy

Therapeutic Indication: IMFINZI (durvalumab) in combination with FLOT chemotherapy as neoadjuvant and adjuvant treatment, followed by adjuvant IMFINZI monotherapy, is indicated for the treatment of eligible adults with resectable gastric and gastro-oesophageal junction adenocarcinoma1

 

Always refer to the Summary of Product Characterictics before prescribing

The MATTERHORN regimen is now approved and NICE recommended in the UK for resectable gastric or gastro-oesophageal junction cancers (GC/GOJC) based on the results of the Phase III MATTERHORN trial*1–5

*The MATTERHORN trial was a global double-blind Phase III trial, whereby eligible patients with resectable GC/GOJC were assigned in a 1:1 ratio to receive IMFINZI 1500 mg (N=474) or placebo Q4W on Day 1 of each cycle, plus FLOT chemotherapy, Q2W on Day 1 and Day 15 of each cycle for 4 cycles (N=474; 2 cycles of each neoadjuvant and adjuvant therapy), followed by IMFINZI 1500 mg or placebo Q4W for 10 cycles.3

Survival outcomes in GC and GOJC remain poor in the UK6–9

Around 6800 people in the UK are newly diagnosed with GC or GOJC each year6

 

 

Nearly half of patients with GC or GOJC present with advanced disease at diagnosis, limiting potentially curative treatment options7

Even when diagnosed with GC at Stage II–III, only ~1 in 4 patients are alive at 5 years8,9

 

Discover the possibilties for eligible patients treated with IMFINZI + FLOT with resectable GC/GOJC1–5

Patients treated with perioperative IMFINZI + FLOT achieved statistically significant and clinically meaningful event-free survival (primary endpoint) and met key secondary endpoints; two-year EFS was 67.4% vs. 58.5% in the IMFINZI group vs. the FLOT alone group (HR for event or death, 0.71 [95% CI 0.58–0.86]; p<0.001)3–5

The safety profile for the combination of IMFINZI + FLOT was consistent with the known profiles of each agent3,4

The addition of IMFINZI to FLOT saw double the pathological complete response rates (key secondary endpoint) with no impact to surgical completion vs. FLOT alone, with 19.2% observed in the IMFINZI group vs. 7.2% in the FLOT alone (RR, 2.69 [95% CI 1.86-3.90]3,4

Explore the MATTERHORN trial
The MATTERHORN regimen
Resources

FLOT, fluorouracil, leucovorin, oxaliplatin and docetaxel; GC, gastric cancer; GOJC, gastro‑oesophageal junction cancer; HCP, healthcare professional; MHRA, Medicines and Healthcare products Regulatory Agency; OG, oesophagogastric; Q2W, every 2 weeks; Q4W, every 4 weeks; UK, United Kingdom.

  1. IMFINZI. Summary of Product Characteristics. United Kingdom.
  2. NICE. TA1160. Available at: https://www.nice.org.uk/guidance/TA1160. Accessed June 2026.
  3. Janjigian YY, et al. N Engl J Med. 2025;393(3):217–230.
  4. Janjigian YY, et al. Presented at ASCO 2025; 30 May–2 June; Chicago, IL. Abstract #LBA5.
  5. Tabernero J, et al. Presented at ESMO 2025; 17–21 October; Berlin, Germany. Abstract #LBA81.
  6. Cancer Research UK. Stomach Cancer Statistics. Available at: https://www.cancerresearchuk.org/health-professional/cancer-statistics/statistics-by-cancer-type/stomach-cancer/. Accessed June 2026.
  7. Cancer Research UK. Early Diagnosis Hub. Available at: https://crukcancerintelligence.shinyapps.io/EarlyDiagnosis/. Accessed June 2026.
  8. Cancer Research UK. Stomach Cancer Survival. Available at: https://www.cancerresearchuk.org/about-cancer/stomach-cancer/survival. Accessed June 2026.
  9. Cancer Research UK. Oesophageal Cancer Survival. Available at: https://www.cancerresearchuk.org/about-cancer/oesophageal-cancer/survival. Accessed June 2026.

GB-77157 | August 2026

Adverse events should be reported. Reporting forms and information can be found at http://www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store. Adverse events should also be reported to AstraZeneca by visiting https://contactazmedical.astrazeneca.com/ or by calling ‌‌‌0‌‌‌8‌‌‌‌‌0‌‌‌‌0‌‌‌ ‌‌7‌‌‌‌‌‌8‌‌‌3‌‌‌ ‌‌0‌‌‌‌‌0‌‌‌‌3‌‌‌‌3‌‌‌.

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