Presentation
Presented for corrective surgery due to progressive scoliosis, initially noted at age 3 years. A full-term birth after an uneventful pregnancy is reported. Child has non-consanguineous parents. At admission a complete absence of the horizontal eye movements was identified, with preserved convergence and vertical eye movements.
Patient Data
PA radiograph shows thoracolumbar scoliosis.
Midline sagittal T1-weighted image shows pons and medulla oblongata with a reduced volume.
Axial T2-weighted images through the pons and medulla demonstrating butterfly‐like appearance of the medulla, accompanied by a midline cleft, consistent with the absence of corticospinal tract fibers decussation. The floor of the fourth ventricle is tent shaped with missing facial colliculi.