MRI (Flair, T2, and T1 sequences) performed in the child at the admission (2007) and four years later (2010). 2007: Hamartoma in the right pontine region and swallen aspect of the omolateral cortico-spinal tract. High signal intensity foci diffuse in the cerebellar emispheres (T2 hyperintensities). 2010: unmodified size of the pontine hamartoma and persistent bulge of the right cortico-spinal tract. Unchanged the UBOs lesions too.