Oberwart

This trial is for adults with recurrent or metastatic head and neck squamous cell carcinoma HNSCC that has not been treated with systemic therapy before. The study compares the anti-tumor effects of amivantamab combined with pembrolizumab and carboplatin against pembrolizumab with 5-fluorouracil and platinum therapy carboplatin or cisplatin. Participants have HNSCC in the oral cavity, oropharynx, hypopharynx, or larynx but not nasopharynx or unknown primary tumor sites, and HPV status is considered for oropharynx cases. Participants are randomly assigned to one of two groups. One group receives pembrolizumab, amivantamab, and carboplatin, while the other receives pembrolizumab, 5-fluorouracil given as a 4-day infusion, and carboplatin or cisplatin. Treatments are given according to standard protocols for these drugs. The study is open-label and conducted across multiple centers. During the trial, participants will be monitored for overall survival and tumor response using established criteria up to about 3 years and 7 months. Additional assessments include progression-free survival, duration of response, quality of life questionnaires specific to head and neck cancer, and safety evaluations through adverse event and lab test monitoring. Blood samples will check amivantamab levels and antibodies. Participation involves regular visits for treatment and assessments throughout the study period.