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Updated: May 28, 2026

Intraoperative Ultrasound in Spinal Surgery
Published on: August 17, 2022
C1-2 instability from os odontoideum mimicking intramedullary spinal cord tumor
Paul R Gigante1, Neil A Feldstein, Richard C E Anderson
1Department of Pediatric Neurological Surgery, Columbia University College of Physicians & Surgeons, New York, New York 10032, USA. pg2223@columbia.edu
Abstract:
Os odontoideum is a common cause of atlantoaxial instability in the pediatric population. The authors present the cases of 2 patients whose initial clinical presentation and MR imaging findings were suggestive of an intramedullary neoplasm, but whose ultimate diagnosis was determined to be cervical spine instability and cord injury due to os odontoideum.
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