The Symposium on Clinical Interventional Oncology (CIO) features a concentrated 2-day program renowned for its originality, patient-care focus and dynamic learning format. CIO focuses on highlighting the most viable and sought-after treatments in interventional oncology while shining a spotlight on current best practices and previewing developments on the horizon. CIO is the must-attend symposium of the year for IO learners searching to stay on the brink of innovation of contemporary techniques, methodologies and technological advances.