Infant with a bump on the forehead

3D CT of metopic craniosynostosis
Axial CT without contrast of the brain (left) shows fusion of the metopic suture in the midline and a triangular appearance to the anterior aspect of the skull (trigonocephaly). Anterior 3D CT reconstruction (right) shows a prominent midline ridge in the anterior skull and hypotelorism with quizzical eye deformities present bilaterally.

The diagnosis was metopic suture craniosynostosis.