School ager with Ehler Danlos syndrome being cleared for general anesthesia

Flexion and extension radiographs of atlanto axial instability
Lateral radiograph of the cervical spine in extension (left) shows the atlanto dental interval to measure 0 mm. Lateral radiograph of the cervical spine in flexion (right) shows the atlanto dental interval to measure 7 mm.

The diagnosis was atlanto axial instability in a patient with Ehlers Danlos syndrome.