In this issue ofPET Clinics, guest editors Drs. Hongming Zhuang and Abass Alavi bring their considerable expertise to the topic ofPET/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.