HER2 Biomarker Testing in Lung Cancer

Helena Yu, MD and Joshua Sabari, MD explore the importance of testing for HER2 alterations in lung cancer; how HER2 positivity influences clinical decision-making; and the key methods used for detection, including immunohistochemistry, fluorescence in situ hybridization, and next-generation sequencing. It also addresses challenges in standardizing HER2 testing, disparities in access to biomarker testing, and the evolving role of liquid biopsy compared to traditional tissue biopsy.