This clinical trial is focused on studying a type of lung cancer known as non-small cell lung cancer (NSCLC) that has specific genetic changes called EGFR mutations. These mutations are known as Ex19del and L858R. The study is for patients who have undergone surgery to completely remove the tumor. The treatment being tested is a medication called osimertinib, which is also known by its code name AZD9291. Osimertinib is taken in the form of film-coated tablets and is being compared to a placebo to see how effective it is in preventing the cancer from returning.
The purpose of the study is to assess how well osimertinib works in keeping the cancer from coming back after surgery. Participants in the study will be randomly assigned to receive either osimertinib or a placebo. The study will last for a period of up to 36 months, during which time participants will take the medication daily. The study is designed to be double-blind, meaning neither the participants nor the researchers will know who is receiving the actual medication and who is receiving the placebo. This helps ensure that the results are not biased.
Throughout the study, the safety and side effects of osimertinib will be closely monitored. The main goal is to see if osimertinib can help patients live longer without the cancer returning, which is referred to as disease-free survival. The study will also look at overall survival rates and how the treatment affects participants’ physical functioning. By the end of the study, researchers hope to have a clearer understanding of the benefits and risks of using osimertinib for treating this type of lung cancer.



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