Figure 4From: Craniocervical junction malformation in a child with Oromandibular-limb hypogenesis-Möbius syndrome3D reconstruction CT scan ; Hypoplastic anterior arch of the atlas and the impacted os terminale of the odontoid (arrow) between the two halves of the maldeveloped anterior arch of the atlas-the os terminale usually fuses at 12 years of age-this can be confused with fracture.Back to article page