Go online to PeerView.com/KCV860 to view the activity, download slides and practice aids, and complete the post-test to earn credit. Cancer immunotherapy in the form of anti–PD-1, anti–PD-L1, and anti–CTLA-4 monoclonal antibodies is swiftly expanding from metastatic to early-stage, curative-intent settings in an increasing number of solid tumors. Furthermore, it’s on the cusp of further explosive growth as other novel agents, including inhibitors of new checkpoints such as LAG-3 and TIGIT, are starting to emerge. Pathologists and oncologists play a crucial role in identifying patients who would benefit the most from the broadening arsenal of immunotherapies and assessing response to these therapies. While there are substantial gaps in biomarker testing, pathologic response assessment, and the use of immunotherapies in current practice, things will only become more complicated. This PeerView Live educational activity, based on a recent symposium, will help you refine your current best practices and prepare you for what’s to come next. Top experts convene to provide a visual exploration of the most important recent advances in immuno-oncology, conduct demonstrations of representative and challenging real-world cases, and walk you through practical exercises on operationalizing biomarker testing and pathologic response assessment in different laboratory and clinical settings. Upon completion of this activity, participants should be better able to: Discuss the rationale, recommendations, and practical considerations related to cancer immunotherapy biomarker testing and pathologic response assessment in different tumors and treatment settings, Use appropriate immunotherapy biomarker testing and pathologic response assessment to cancer immunotherapies according to the latest evidence, requirements, and best practice recommendations across different tumors and treatment settings, Implement effective strategies for multidisciplinary communication, collaboration, and coordination among pathologists, oncologists, and other care team professionals regarding selection and interpretation of immunotherapy biomarker tests and pathologic response assessment to guide clinical decision-making regarding cancer immunotherapies across different tumors and treatment settings.