Bogengangsaplasie

Neuroimaging

assessment in Down syndrome: a pictorial review. Temporal bone CT (a) and MRI (axial T2/3D) (b) from a 2-year-old patient with Down syndrome at the level of the internal auditory canal, showing complete absence of the right bone island and consequent aplasia of the lateral semi-circular canal. Note also the dysplastic vestibule as a result of the absence of the lateral semi-circular canal