Simultaneous Traumatic Fractures of the Atlas and Axis: Presentation, Management, and Outcomes from a Series of 103 Consecutive Patients.

Background: Simultaneous fractures of C1 and C2 are increasingly common, but contemporary series are limited in their evaluation.

Methods: All patients with traumatic fractures of both C1 and C2 admitted to an academic trauma center from 2012 to 2022 were retrospectively analyzed. Multivariable regression was used to identify characteristics relevant to management and outcomes.

Complex posterior atlantoaxial instability in pediatric os odontoideum: A novel stabilization strategy.

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.

Management of complex vertebral artery anatomy in craniocervical surgery: A case report.

Background: The surgery on the craniocervical junction is associated with complex techniques that endanger the vertebral artery (VA), especially if there are some anatomical variations present, thereby increasing the risk of vascular injury, particularly during cervical decompression or instrumentation.

Case Description: A case of a 60-year-old female with progressive myelopathy and craniocervical junction malformation is presented. Key preoperative imaging findings included basilar invagination, C1 assimilation, and os odontoideum, along with VA anomalies such as a tortuous, hypoplastic left VA arising anomalously from the aortic arch and a right VA with a V2 segment forming a high-riding medial loop into the C2 vertebral body.

The Change of Asymptomatic Atlantoaxial Instability With Down Syndrome From Infant to Adolescent in Japanese Population: Minimum 10 Years Follow-Up.

Background: Although 10% to 60% of patients with Down syndrome (DS) develop atlantoaxial instability (AAI), clarifying the course of asymptomatic AAI may prevent unnecessary clinical interactions and investigations. This study investigates the radiographic changes observed in asymptomatic AAI associated with DS in Japanese children as they grow from infancy to adolescence over a minimum of 10 years.

Methods: A retrospective analysis of cervical radiographs acquired from asymptomatic patients with DS in both infancy and adolescence was carried out.

Dystopic Os Odontoideum With Chronic Posterior Atlantoaxial Subluxation: A Case Report.

Os odontoideum is considered a rare cervical spine anomaly. Depending on its type, it may or may not result in atlantoaxial instability, which can lead to anterior subluxation (the most common type) or posterior subluxation, with the latter being extremely rare. Posterior atlantoaxial subluxation is particularly dangerous, as it can progressively lead to myelopathy through various mechanisms and may ultimately result in quadriplegia or even death.

Endoscopic transnasal and transoral resection of the odontoid process and C1 combined with occipitocervical fusion for osteoradionecrosis of the upper cervical spine: a case report and literature review.

Background: Osteoradionecrosis (ORN) of the upper cervical spine is a rare but severe complication of head and neck cancer radiotherapy. To raise awareness of this condition, we describe a patient with a history of nasopharyngeal carcinoma who developed ORN of the upper cervical spine and review the published literature reporting surgical management.

Case Presentation: A 59-year-old female patient with persistent neck pain for one month and limited range of neck motion who had undergone radiotherapy for nasopharyngeal carcinoma with a total dose of 69.

Outcomes of odontoid fractures with associated cardiac arrest: retrospective bi-center case series and systematic literature review.

Background: Odontoid fractures from high-energy trauma are associated with significant morbidity and mortality, including spinal cord injury, neurological damage, and cardiac arrest. The literature on odontoid fractures leading to cardiac arrest is limited to isolated case reports. This study aims to conduct a retrospective bi-center case series and a systematic review of existing literature.

Cephalometric differences in grades II and IV adenoid hypertrophy: A cross-sectional study.

Objectives: This study aims to determine whether there were cephalometric changes between grades II and IV adenoid hypertrophy.

Methods And Materials: A cross-sectional study was conducted on 120 6-12-year-old patients selected from the ear, nose, and throat department at Imam Al-Hussein Medical City in Karbala. Patients were classified into three groups (each = 40) based on endoscopic findings: control, grade II, and grade IV.

Atlantoaxial Instability due to Os Odontoideum in a Child with Christianson Syndrome.

Introduction: Christianson syndrome is a rare neurodevelopmental disorder associated with mutations in the gene located on the chromosome X. It is characterized by intellectual disability, developmental delay, speech and language impairments, dysmorphic features, seizures, ataxia, and neurobehavioral problems.

Case Presentation: A 5-year-old boy was presented with respiratory failure and then progressive muscle weakness in all four extremities.

Database Review of 514 Patients with Os Odontoideum. Detailed Analysis of 258 Surgically Treated (1978-2019).

Objective: Database review (1978-2019) is to identify the cause of os odontoideum, its presentation, associated abnormalities, and management recommendations.

Methods And Materials: Review of referral database of 514 patients and 258 surgically treated patients ages 4-64 years. Detailed history of early childhood trauma and initial encounter record retrieval were made.

Odontoid Fracture with Locked Posterolateral Atlantoaxial Dislocation: A Case Report and Review of Literature.

Case: Odontoid fractures with atlantoaxial dislocations are rare injuries. We report a case of a 41-year-old man with a Type 2 odontoid fracture with locket facet and posterolateral dislocation. He underwent single-stage C1-C4 posterior fixation and fusion, and at 2-year follow-up, he is symptom-free without any residual pain.

Effect of the Basilar Invagination (Type B) on Cervical Spine: A Case-control Study with MRI.

Objective: To evaluate the effect of the basilar invagination (BI) type B on cervical spine.

Methods: The research protocol used head magnetic resonance imaging (MRI) exams from 41 participants with BI type B and 158 controls. The criterion for BI was the distance of the odontoid apex to Chamberlain's line (DOCL) equal to or greater than 7 mm.