title: Avulsion fracture of the anterior half of the foramen magnum involving the bilateral occipital condyles and the inferior clivus--case report.
abstract: A 38-year-old male presented with an avulsion fracture of the anterior half of the foramen magnum due to a traffic accident. He had palsy of the bilateral VI, left IX, and left X cranial nerves, weakness of his left upper extremity, and crossed sensory loss. He was treated conservatively and placed in a halo brace for 16 weeks. After immobilization, swallowing, hoarseness, and left upper extremity weakness improved. Hyperextension with a rotatory component probably resulted in strain in the tectorial membrane and alar ligaments, resulting in avulsion fracture at the sites of attachment, the bilateral occipital condyles and the inferior portion of the clivus. Conservative treatment is probably optimum even for this unusual and severe type of occipital condyle fracture.
authors.affiliation: Division of Neurosurgery, Institute of Neurological Sciences, Faculty of Medicine, Tottori University, Yonago.
authors.forename: M
authors.initials: M
authors.lastname: Tanabe
authors.forename: T
authors.initials: T
authors.lastname: Watanabe
authors.forename: S
authors.initials: S
authors.lastname: Matsumoto
authors.forename: H
authors.initials: H
authors.lastname: Okamoto
authors.forename: K
authors.initials: K
authors.lastname: Shirakashi
mesh_terms: D000063:Accidents, Traffic; D000328:Adult; D002574:Cervical Vertebrae / Q000000981:diagnostic imaging; D003388:Cranial Fossa, Posterior / Q000000981:diagnostic imaging / Q000293:injuries*; D020209:Cranial Nerve Injuries; D005539:Foramen Magnum / Q000000981:diagnostic imaging / Q000293:injuries*; D005592:Fracture Fixation / Q000379:methods; D005596:Fractures, Closed / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000628:therapy*; D006801:Humans; D008297:Male; D011859:Radiography; D016896:Treatment Outcome