Diagnosis of NSCLC typically involves imaging studies such as chest X-rays, computed tomography (CT) scans, and positron emission tomography (PET) scans. Once a suspicious lesion is identified, a biopsy is performed to confirm the diagnosis and to determine the specific type and stage of cancer. Molecular testing for genetic mutations, such as EGFR, ALK, and KRAS, is increasingly used to tailor targeted therapies.
