Rare congenital anomalies simulating upper cervical spine fractures.
Congenital anomalies of the cervical spine are rare, especially those involving the atlas. Two cases are reported, one each of an unfused anterior arch and an unfused posterior arch of C1 that on plain film radiographs simulated unusual odontoid fractures. A general discussion of the development of the dens and the atlas follows.
Glasser
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Department of Radiology, Albert Einstein Medical Center, Philadelphia, Pennsylvania 19128.
Glasser
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D000328:Adult; D001270:Cervical Atlas / Q000002:abnormalities / Q000000981:diagnostic imaging; D002574:Cervical Vertebrae / Q000002:abnormalities* / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D016103:Spinal Fractures / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed