atlas fracture

C1 fracture

A fracture which occurs with axial loading or axial loading + neck flexion, extension, lateral bending or axial rotation.

Clinical findings
C1F victims either die at the scene or present without neurologic deficit—e.g., neck stiffness, limited neck movement, suboccipital pain, muscle spasm, headache.
 
Imaging
Open-mouth odontoid views may show displacement of the lateral masses and are more useful than lateral views. Up to 25% of C1 fractures are missed on plain radiographs; a CT provides detailed visualisation of fracture(s).
 
Epidemiology
C1Fs are most common in the 2nd decade of life with a 2:1 male:female ratio, account for 4–15% of all cervical fractures and linked to MVAs/RTAs and falls; 40% are associated with C2 injuries.
 
Types of C1Fs
Posterior arch fracture, Jefferson fracture.

atlas fracture

C1 fracture, see there.
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References in periodicals archive ?
5) When an atlas fracture is associated with an axis fracture, patients may undergo external immobilization to allow C1 to heal prior to surgical repair of C2.
A case of Collet-Sicard syndrome associated with traumatic atlas fractures and congenital basilar invagination.

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