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Foramen magnum syndrome caused by a dolichoodontoid process.

A 21-year-old Japanese man with basilar impression with an anomalous configuration of the odontoid process and many other vertebral anomalies is reported. We thought that posterior decompression alone would be hazardous; therefore, in one session, the odontoid tip and anterior arch of the atlas were removed transorally, and posterior fixation between the occipital squama and the lamina of C-3 using acrylic plastic was performed. This treatment resulted in marked clinical improvement and required only a short hospital stay.

Adult↗

Foramen magnum schwannoma with an unusual clinical presentation: case report.

This case report illustrates a patient with a unilateral localized epidural schwannoma at C1-2 level, showing contralateral spinal cord symptoms and signs. The clinical presentation was compared with the neuroradiological examinations showing an epidural cord tumor at the right C1-C2 level. However, the neurological examination revealed contralateral hemiparesis and ipsilateral hemihypoalgesia, indicating a contralateral Brown-Sequard syndrome. We presumed with this slow growing tumor, contralateral cord involvement may result from counter pressure on the spinal cord, which may be generated by cord deviation and by frequent neck rotation.

Brain Neoplasms↗