In this issue of PET Clinics, guest editors Drs. Hongming Zhuang and Abass Alavi bring their considerable expertise to the topic of PET/MRI for the Pediatric Patient. Tops experts cover key topics such as application of PET/MRI in the assessment of inflammatory and infection disease in pediatric patients; PET/MRI in the evaluation of lymphomas and post-transplant lymphoproliferative disorder in pediatric patients; evaluation of congenital hyperinsulinism using 18F-FDOPA positron emission tomography; management of pediatric brain tumors with aid of PET/MRI; and much more.