EGFR Exon 19 Deletion Mutation

The purpose of this observational study is to understand how well a treatment combining chemotherapy and amivantamab works in real life, and how safe it is, in adults with metastatic non-small cell lung cancer (NSCLC) who have certain EGFR gene mutations. The study includes two groups of people: * Group A: people with an EGFR exon 20 insertion who receive amivantamab together with platinum-based chemotherapy as their first treatment, through an early access program. * Group B: people with an EGFR exon 19 or exon 21 mutation who receive amivantamab with platinum-based chemotherapy after having been treated with osimertinib (with or without chemotherapy), also through an early access program. The main question the study wants to answer is: How long can the combination of amivantamab and chemotherapy keep the cancer from coming back or getting worse in these two groups of people? People already receiving amivantamab and chemotherapy for NSCLC through an early access program may be included. They will continue to be followed by their usual oncologist as part of their normal medical care. The study will simply collect their medical information from March 21, 2024 to October 21, 2025. No extra tests or procedures are required. This is an observational study, carried out by the GFPC and partner centers in France.

EGFR gene mutations are some of the most commonly occurring mutations in non-small cell lung cancer. Investigators have developed a DNA instability model that estimates a risk score to assess the likelihood of an individual acquiring a cancer-linked mutation. The aim of this study is to collect blood from both those diagnosed with EGFR positive lung cancer and healthy individuals, evaluate their gene sequence surrounding the EGFR landscape and use the cancer positive and healthy sequences to validate the risk assessment model, which may one day be used to provide insight on susceptibility of getting EGFR positive lung cancer or potentially other cancer types.