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Complex posterior atlantoaxial instability in pediatric os odontoideum: A novel stabilization strategy.
Clin Neurol Neurosurg
December 2024
Clinic of Radiology, Bahçeşehir University Göztepe Medical Park Hospital, Istanbul, Turkey.
Introduction: Os odontoideum (OO) is a rare anatomic variant of the axis characterized by the separation of a part of the axis. It may cause cervical instability, atlantoaxial dislocation, myelopathy, or permanent paralysis. We present an extremely rare case of an OO with posterior atlantoaxial dislocation in a child.
View Article and Find Full Text PDFPhilosophies And Surgical Techniques on Os Odontoideum Treatment with Literature Review.
J Orthop Case Rep
September 2024
Department of Spine Surgery, Yonsei Okay Hospital, Seoul, South Korea.
Introduction: Os-odontoideum is a rare condition described radiographically and clinically as a congenital anomaly of the second cervical vertebra (axis). It is a smooth, independent ossicle of variable size and shape separated from the base of a shortened odontoid process by an obvious gap, with no osseous connection to the body of C2.
Materials And Methods: This study reviewed the literature on OO to evaluate its etiology, clinical presentations, differential diagnosis, imaging modalities, and outcomes in the management of asymptomatic and symptomatic cases of Os Odontoideum.
Letter to the editor: C1-C2 fixation by Harms procedure to treat symptomatic os odontoideum in a 2-year-old child.
Neurochirurgie
September 2023
Service de neurochirurgie et de chirurgie rachidienne, assistance publique hôpitaux de Marseille, Marseille, France.
Case report of bilateral middle ear effusion requiring myringotomy and tube placement following inferior U-shaped nasopharyngeal flap elevation for endonasal odontoidectomy: investigation of causality.
Acta Neurochir (Wien)
October 2023
Department of Neurological Surgery, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
We describe a patient with symptomatic os odontoideum and a previous history of C1-2 wiring who underwent successful treatment with a staged endonasal odontoidectomy and C1-2 revision of instrumentation. Access to the odontoid process was gained through the endonasal corridor using an inverted U-shaped nasopharyngeal flap (IUNF). Post-operatively, the patient experienced resolution of her presenting neurologic symptoms but developed conductive hearing loss secondary to bilateral middle ear effusion, requiring bilateral myringotomy and tube placement 3 months post-operatively.
View Article and Find Full Text PDFMR documented craniocervical ligamentous injury at age 18 months: delayed formation of OS odontoideum. Complex management issues. Case-based review.
Childs Nerv Syst
April 2023
Department of Neurosurgery, University of Iowa Hospitals & Clinics, 200 Hawkins Drive, 1824 JPP, Iowa City, IA, 52242, USA.
Objective: There are two separate theories regarding the genesis of os odontoideum: congenital and post-traumatic. Trauma documentation in the past has been the presence of a normal odontoid process at the time of initial childhood injury and subsequent development of the os odontoideum. True MR documentation of craniocervical injury in early childhood and subsequent os odontoideum formation has been very rare.
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