Pseudotumoral acute cerebellitis associated with mumps infection in a child

Figure 1 Magnetic resonance imaging: T2 and T1 post contrast images. A and B: Cerebellar hyperintense areas on T2-weighted images predominant on the right side (white arrow in A), related to diffuse edema and producing cerebellar mass-effect on the fourth ventricle (blue arrow) and brainstem (white head arrow), tonsillar herniation (white arrow in B) and supratentorial hydrocephalus (blue head arrow); C: Gadolinium-enhanced T1-weighted sequence revealed leptomeningeal enhancement along the cerebellar folia.

Figure 2 Magnetic resonance spectroscopy (TE = 35 ms) showed mildly reduced N actetyl aspartate/creatine and normal Choline/Creatine ratios. Doublet of lactate/lipid peak (1.3 ppm) was detected. NAA: N actetyl aspartate.