Fig. 2
Main conventional imaging findings of this patient with horizontal gaze palsy with progressive scoliosis. a Chest X-ray showing S-shaped scoliosis of the thoracolumbar spine. b Axial T2-weighted brain magnetic resonance imaging showing a midline cleavage at the dorsal aspect of the pons (split pons sign) (arrow). c Butterfly configuration of the medulla (arrow). d Atrophic change of the pons in sagittal view