The Society of Interventional Oncology (SIO) is a non-profit membership society that supports and promotes the field of interventional oncology (IO).

SIO provides a community for IO professionals to connect and work together to advance IO as the fourth pillar of cancer therapy worldwide alongside our clinical partners in medical, surgical, and radiation oncology. Our society offers a space for IO practitioners to continue their professional development, access and develop research opportunities, and advocate together for the advancement of this growing specialty.