okzipitozervikale Instabilität

School ager

with Trisomy 21. Lateral radiograph of the cervical spine in flexion (left) shows a normal atlanto dens interval and normal relationship of the occipital condyles to the lateral masses of C1 while on extension (right) there is posterior translation of the occipital condyles in relation to the lateral masses of C1.The diagnosis was atlanto occipital instability in a patient with Trisomy 21.

Neuroimaging

assessment in Down syndrome: a pictorial review. a Sagittal T2/TSE of a 12-year-old Down syndrome patient showing a small and flattened shape of the occipital condyle as well as the C1 superior articular facet, with some degree of anterior luxation of C1. b Sagittal T2/TSE of a normal 12-year-old boy for comparison; there is normal curved shape of articular facets