Atlantoaxial Dislocation on Os Odontoideum Complicated by Dural Breach and Cervical Myelopathy in an Adolescent: A Case Report

Authors

Mehdi Salmane, Abdallah Said, Alia Yassine Kassab, Lina Lasri, Firdaous Touarsa, Meryem Fikri

Journal Information

Journal: Medpeer Publisher

ISSN: 3066-2737

Volume: 3

Issue: 5

Date of Publication: 2026/05/27

DOI: 10.70780/medpeer.000QGSY

Abstract

Os odontoideum is a rare anomaly of the odontoid process that may predispose to atlantoaxial instability and neurological complications. We report the case of a 16-year-old patient with a history of cervical trauma two years earlier, presenting with progressive upper limb paresis. Cervical MRI and CT imaging demonstrated C1–C2 dislocation on underlying os odontoideum complicated by dural breach and signs of cervical spinal cord suffering. This case highlights the importance of imaging in diagnosing delayed complications of atlantoaxial instability associated with os odontoideum.

Keywords

Os odontoideum, Atlantoaxial dislocation, Cervical myelopathy, Dural breach, Cervical trauma.