Imaging Features of Juvenile Xanthogranuloma of the Pediatric Head and Neck.

Head and neck juvenile xanthogranuloma has varied manifestations. Mild hyperintensity on T1, hypointensity on T2 compared with the cerebral cortex, decreased diffusivity, and homogeneous enhancement are characteristic. Awareness of these features should prompt radiologists to include juvenile xanthogranuloma in the differential diagnosis of pediatric head and neck masses.