Fig. 16

T2 hyperintensity in posterior fossa—dorsal pons (Pattern 6A). Case 1: 4-year-old child with fluctuating GCS. Stool was positive for enterovirus (serotype E-71). T2-weighted imaging (a, b) demonstrated hyperintensity of the dorsal pons and medulla, with extension of signal abnormality into the middle cerebellar peduncles bilaterally (arrows). Case 2: 3-year-old child with lethargy, vomiting and fever, as well as right facial nerve palsy and unsteadiness on feet. Stool was positive for enterovirus (serotype not known). T2-weighted imaging (c, d) demonstrated hyperintensity of the dorsal pons and medulla, with extension of signal abnormality into the middle cerebellar peduncles bilaterally (arrows)