This clinical trial is focused on studying certain types of advanced cancers that have specific changes in a gene called EGFR. These changes are known as EGFR exon20 insertion mutations. The trial is testing a new treatment called BLU-451, which is taken as a film-coated tablet. The purpose of the study is to find out how safe and effective BLU-451 is when used alone or in combination with other treatments, such as platinum-based chemotherapy.
The study is divided into two phases. In the first phase, researchers aim to determine the best dose of BLU-451 that can be given safely to patients. They will also look at how well patients tolerate the treatment. In the second phase, the focus will be on how well BLU-451 works against the cancer. Participants will receive either BLU-451 or a placebo, and their health will be monitored closely throughout the study.
During the trial, participants will take the medication orally and will have regular check-ups to assess their response to the treatment. The study will also gather information on any side effects experienced by participants. The trial is expected to continue until July 2026, with recruitment starting in February 2024.



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