Atlantoaxial stability in ossiculum terminale. Case report

Bergmann's ossicle (ossiculum terminale persistens): a brief review and differentiation from other findings of the odontoid process

PURPOSE

The purpose of this paper was to review the literature on Bergmann's ossicle and provide an overview on its development, etiology, and clinical presentation while also differentiating it from similar structural anomalies.

METHODS

A thorough review of the literature available on Bergmann's ossicle was performed.

RESULTS

Bergmann's ossicle, also referred to as ossiculum terminale persistens, was defined as a developmental anomaly of the odontoid process in which an ossification center that gives rise to the tip of the dens fails to fuse properly with the body of the axis.

CONCLUSION

Bergmann's ossicle is most often a benign condition, although it rarely may present with clinical symptoms such as neck pain and neurological signs. It may be associated with Down's syndrome and contribute to atlantoaxial instability.

Pediatric Spinal Cord Injury: Recognition of Injury and Initial Resuscitation, in Hospital Management, and Coordination of Care

Spinal cord injury is uncommon in the pediatric population with a lifelong impact for the patient and family. Knowledge of spine embryology, mechanisms of injury that lead to specific injuries, appropriate utilization of radiographic imaging based on suspected injury, prehospital and hospital management of various spinal cord injuries is essential for providers attending to traumatically injured patients. In addition to patients who present with soft tissue and bony injuries diagnosed with clinical examination and confirmed with computed tomography or magnetic resonance imaging, it is important to note that the pediatric population is at a higher risk for spinal cord injury without radiographic abnormality than the adult population. Patients who survive the acute phase of injury face long-term rehabilitation and have an increased risk of depression and mortality. Understanding the long-term sequelae of spinal cord injuries is also an essential management component of traumatically injured children. A program that provides long-term rehabilitation, psychosocial and spiritual support, and adaptive environmental supports gives patients and their families the best opportunity for long-term recovery. A review of the current literature on the diagnosis, management, and follow-up of pediatric spinal cord injury is presented.

Special considerations in the interpretation of plain radiographs of the cervical spine in children. A review of the literature

INTRODUCTION

This review provides an overview of the special considerations with regard to correct diagnosis of plain radiographs of the pediatric cervical spine. Injuries to the cervical spine are rare in children. The leading trauma mechanism is motor vehicle injury. Plain radiographs are a common tool in the search for a diagnosis. Taking the growth process into account there are many differences to be found compared to the adult c-spine. Knowledge of these differences is important when working towards the correct interpretation of plain radiographs of the pediatric c-spine.

METHODS

To create this review, a literature search of the electronic databases Cochrane, PubMed/MEDLINE and Embase was conducted.

RESULTS

Special considerations of plain radiographs of the pediatric c-spine are presented. Biomechanical and embryology specifics have been a focus of this review. They are explained relating on the development of the c-spine. The known auxiliary lines used in the interpreting of the pediatric c-spine are reported. A selection of these auxiliary lines is shown.

CONCLUSION

Knowledge of the c-spines characteristics is of major importance for every physician involved in pediatric trauma care. This could lead to not only avoiding misdiagnosis but could also lead to avoiding the overuse of computed tomography of the pediatric c-spine.

Pediatric cervical spine injuries: a comprehensive review

INTRODUCTION

Cervical spine injuries can be life-altering issues in the pediatric population. The aim of the present paper was to review this literature.

CONCLUSIONS

A comprehensive knowledge of the special anatomy and biomechanics of the spine of children is essential in diagnosis and treating issues related to spine injuries.

"Orthotopic" ossiculum terminale persistens and atlantoaxial instability in a child less than 12 years of age: a case report and review of the literature

We report ossiculum terminale persistens associated with atlantoaxial instability in a child less than 12 years of age. Static and dynamic X-rays, thin-cut computed tomography with sagittal and coronal reconstructions, and magnetic resonance imaging of the cervical spine showed atlantoaxial instability and an “orthotopic” ossiculum terminale persistens. This pathologic state was differentiated from the primary ossification center at the tip of the odontoid, which normally is not expected to fuse with the body of the odontoid until the age of 12 years. The patient was taken to the operating room for a posterior instrumented fusion of C1 and C2. The patient has done well in short- and long-term follow-up.

There have been only a few case reports and small case series regarding atlantoaxial instability, requiring surgical intervention, from ossiculum terminale persistens. Most have presented later in life or in association with Down syndrome. Furthermore, most cases have been of the “dystopic” variant. The terms - “orthotopic” and “dystopic” anatomic variants - have usually been reserved to describe os odontoideum. However, we introduce these terms in describing ossiculum terminale persistens and show a rare case of “orthotopic” ossiculum terminale persistens associated with atlantoaxial instability in a pediatric patient less than the age of 12.

[Ossiculum terminale (Bergmann). Differential diagnosis of an odontoid fracture of the Anderson I type]

We describe a case of the rare entity of a persistent ossicle on the top of the odontoid process. In a short review of the literature, we show developmental abnormalities of the odontoid process and its etiologies. The terminal ossicle (Bergmann) plays an important role in the differential diagnosis of a fracture of the odontoid process type I in adults using the classification of Anderson and D'Alonzo. If fracture and instability is excluded by plain radiographs, computed tomography and/or MRI, there is no need for additional therapy.