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The Lead: Unprecedented Cancer Treatment SuccessDoctors have hailed "unprecedented" trial results that show a triple-action cancer jab can eradicate entire tumours in patients. In an international trial spanning 11 countries, the injection was offered to patients whose cancer had spread or come back and whose disease had failed to respond to other treatments.The Breakthrough: Amivantamab's Triple-Action ApproachThe jab, called amivantamab, shrank the tumours of more than a third of patients, with dramatic changes seen within weeks. In 15 of them, doctors found the drug had melted away their tumours altogether.The smart jab targets cancer in three ways. It blocks both EGFR (epidermal growth factor receptor), a protein that helps tumours grow, and MET, a pathway that cancer cells often use to escape treatment. It also helps activate the immune system to attack the tumour.The Clinical Trial Data: Impressive Response RatesIn the trial, 102 patients with head and neck cancer, the world's sixth most common cancer, were given the jab. Tumours shrank or disappeared completely in 43 patients, including 28 whose tumours shrank significantly and 15 who saw them eradicated entirely.Patients receiving amivantamab lived for a median of 12.5 months overall after starting treatment, despite having a form of cancer with very poor outcomes, once standard treatments stop working.The Impact Analysis: New Hope for Treatment-Resistant CancersKevin Harrington, professor in biological cancer therapies at the Institute of Cancer Research, London (ICR), said: "These are unprecedentedly strong responses in patients whose disease has become resistant to both chemotherapy and immunotherapy. This is a group of patients for whom treatment options are extremely limited, so seeing this level of benefit is very striking."Researchers also highlighted that the trial focused on people with head and neck cancers that did not include those with human papillomavirus (HPV) positive oropharyngeal squamous cell carcinoma. That is particularly significant, they said, since head and neck cancers not caused by HPV are usually harder to treat, making progress in this group hugely important.The Patient Experience: Transforming Quality of LifeOne of the first patients to benefit was Carl Walsh, 56, who was diagnosed with tongue cancer in May 2024 and joined the OrigAMI-4 trial at the Royal Marsden in July 2025. "I was initially treated with both chemotherapy and immunotherapy, which unfortunately were not successful," he said. "At that point, I was recommended for the OrigAMI-4 trial. I'm now on my 17th cycle of treatment and I'm very pleased with the progress so far."Unlike many cancer treatments, amivantamab is given as a tiny jab under the skin rather than via an intravenous drip, making treatment quicker and more convenient for patients and much easier to deliver in outpatient clinics.The Future Outlook: Expanding Treatment ApplicationsThe results will be presented on Sunday in Chicago at the world's largest cancer conference, the annual meeting of the American Society of Clinical Oncology (Asco).Amivantamab, developed by Johnson & Johnson, is now being evaluated in about 60 clinical trials, primarily for lung cancer, but also for colorectal, brain and gastric cancers.Prof Kristian Helin, the chief executive of the ICR, said: "This study demonstrates how the development of new treatments through rigorous cancer research may lead to meaningful advances, even for patients with very limited treatment options. Achieving this level of tumour response and encouraging survival outcomes in such a challenging-to-treat group represents a significant step forward."