Pathological cervical fracture after spinal manipulation in a pregnant patient.
OBJECTIVE
To present the rare case of a displaced odontoid fracture after manipulative treatment.


METHODS
A 37-year-old, 15-week pregnant patient was referred with acute neck pain and a diffuse paravertebral swelling that started after cervical manipulation performed by her general medical practitioner 5 days before. Because of pregnancy, a cervical spine radiographic series was not obtained before treatment. Magnetic resonance imaging revealed a displaced odontoid fracture associated with a pathological process in the vertebral body of C2 and a paravertebral hematoma on the left side from C2 to C4.


RESULTS
After initial halo vest immobilization, an anterior-posterior fusion of C1-C2 was performed. The histological analysis showed features of an aneurysmal bone cyst. The patient was discharged and had an undisturbed pregnancy and was without any neurological complications.


CONCLUSIONS
Because of the weakening lesion in C2, the spinal manipulation most likely caused the displaced odontoid fracture. Special imaging should be performed, preferably with magnetic resonance imaging, when a patient experiences significant new symptoms after cervical manipulation.
Schmitz
Alfred
A
Department of Orthopaedic Surgery, University of Bonn, Germany. a.schmitz@uni-bonn.de
Lutterbey
Goetz
G
von Engelhardt
Lars
L
von Falkenhausen
Marcus
M
Stoffel
Michael
M
D000328:Adult; D002574:Cervical Vertebrae / Q000293:injuries*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D026882:Manipulation, Chiropractic / Q000009:adverse effects*; D009809:Odontoid Process / Q000293:injuries*; D011247:Pregnancy; D016103:Spinal Fractures / Q000209:etiology*