Dr. Matthew Ehrhardt is an Associate Member in the Division of Cancer Survivorship at St. Jude Children’s Research Hospital specialized in the care of long-term childhood cancer survivors and children newly diagnosed with Hodgkin and non-Hodgkin lymphoma. He is a Co-Chair of the Children’s Oncology Group (COG) Group Long-Term Follow-Up Guidelines for Survivors of Childhood, Adolescent, and Young Adult Cancers and a member of the American Society of Clinical Oncology Survivorship (ASCO) Guideline Advisory Group, the American College of Radiology (ACR) Appropriateness Criteria Committee, and multiple COG, National Comprehensive Cancer Network (NCCN), and International Guideline Harmonization Group (IGHG) guideline panels and initiatives. His research is focused on the long-term effects of childhood cancer therapy as well as surveillance guideline development, dissemination, and utilization.