12/05/2025
Biomarker testing looks at certain features of a lung tumor to learn more about how it behaves. In non-small cell lung cancer (NSCLC), this information can help doctors better understand the cancer and consider different treatment options.
Testing is often done when someone is first diagnosed or if treatment plans are being reviewed. The results may help guide decisions about whether targeted therapy, immunotherapy or other approaches could be appropriate.
Knowing what biomarker testing is and why it’s done can help patients and caregivers feel more confident asking questions and taking part in conversations with their care team.