Pediatric body applications of FDG PET.

who had PET scans to evaluate CNS disease. These two patients illustrate normal variability of FDG uptake in pediatric chest. A, 1-year-old girl with developmental delay after neonatal encephalitis. Note normal FDG accumulation, which is intense in heart and more mild in thymus (arrow) in inverted “V’ configuration. B, 5-year-old autistic boy with less intense FDG uptake in thymus (arrow), but more intense uptake in lymphoid tissues in neck (arrowhead).