Systemic and Intracranial Efficacy and Safety of Trastuzumab Deruxtecan in Patients with HER2-Mutant Non-Small Cell Lung Cancer across Treatment Lines: Evidence from the TRACER/HERTras Real-World Cohort

In the largest real-world cohort reported to date, T-DXd demonstrated robust systemic and intracranial activity in HER2-mutant NSCLC, including treatment-naïve patients and those with active brain metastases who were largely excluded from prior studies. Toxicity was consistent with previous reports, with ILD remaining the main safety concern. These findings support integration of HER2-targeted therapies into evolving treatment algorithms.