Surgical Stabilization of an Occipitoatlantoaxial Malformation in an Adult Dog

Galban, Evelyn M.; Gilley, Robert S.; Long, Sam

doi:10.1111/j.1532-950x.2010.00734.x

Cited by 13 publications

(24 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is because this is a high motion joint, and unless this joint could be stabilized and a normal anatomical alignment maintained, chronic pain and the potential for spinal cord compression would be likely. Theoretically, arthrodesis of the AA joint may be possible and has been described in people [41] and dogs [42,43]. The biomechanics of this joint, however, have not been studied in the horse, and it is therefore not known whether any other of the currently available techniques for interbody fusion would be appropriate at this site [44].…”

Section: Discussionmentioning

confidence: 99%

Cervical Vertebral Osteomyelitis With Secondary Septic Arthritis of the Atlantoaxial Joint in a Foal: A Case Report

Crabtree¹,

Jorgensen

2012

Journal of Equine Veterinary Science

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Cervical Vertebral Osteomyelitis With Secondary Septic Arthritis of the Atlantoaxial Joint in a Foal: A Case Report

Crabtree¹,

Jorgensen

2012

Journal of Equine Veterinary Science

View full text Add to dashboard Cite

“…Case studies in dogs with atlantoaxial instability do not report such a focal lesion with ring enhancement, nor post-traumatic syringomyelia as such. 9–12 One study found syringomyelia associated with atlantoaxial instability in two dogs, yet both were associated with enlarged ventricles and one was also associated with the caudal occipital malformation syndrome, suggesting the syrinx might be unrelated to the atlantoaxial instability. 9 Nonetheless, a review article stated that this phenomenon has not been described in veterinary literature, yet reported from the author’s own experience that over time disturbances in cerebrospinal fluid flow at the site of the spinal cord injury can result in the development of syringomyelia.…”

Section: Discussionmentioning

confidence: 99%

Traumatic spinal cord injury caused by suspected hyperflexion of the atlantoaxial joint in a 10-year-old cat

Wessmann

McLaughlin

Hammond

2015

Journal of Feline Medicine and Surgery Open Reports

View full text Add to dashboard Cite

Case summaryA 10-year-old cat presented 5 days after a traumatic event with acute recumbency followed by some clinical improvement. The neuroanatomical localisation was the C1–C5 spinal cord segments. Initial survey radiographs, including lateral flexed views, showed no convincing abnormalities. Magnetic resonance imaging (MRI) revealed a marked focal intramedullary lesion at the level of the dens and suspected oedema extending over C2–C3 vertebrae, suggesting early syrinx formation. The cat made an initial excellent recovery on restricted exercise without medical treatment. The MRI changes largely resolved on follow-up MRI 4 weeks later yet recurred following a relapse 4 months later. At this stage, a post-traumatic syrinx had developed. Moreover, the suspected atlantoaxial instability was finally diagnosed on radiography with fully flexed lateral views. A hyperflexion injury causing tearing of the atlantoaxial ligaments was considered most likely given the lack of malformations or fractures. The cat made a full recovery on conservative management.Relevance and novel informationThis is the first report of sequential MRI findings in a cat with atlantoaxial instability. Moreover, post-traumatic syringomyelia formation following atlantoaxial injury has not been reported. Sequential MRI aids in the diagnosis of hyperflexion injury if survey radiographs fail to identify atlantoaxial instability.

show abstract

“…Occipitoatlantoaxial malformation (OAAM) describes triosseous anomalies of the craniovertebral junction affecting the occipital bones, axis and atlas. [1][2][3][4][5][6][7][8] Case reports of OAAM exist in various species, such as the cat, dog, goat, dromedary camel and wild Japanese serow. 1,[3][4][5][6][7][8][9][10][11] The condition is thought to be inherited in Arabian horses and Holstein cattle, whereas in other species postnatal fracture, trauma or inflammation has been reported.…”

Section: Introductionmentioning

confidence: 99%

Occipitoatlantoaxial Malformation in a Dog Treated with a Custom-Made Implant

Rotter¹,

Rusbridge

Fitzpatrick³

2020

VCOT Open

View full text Add to dashboard Cite

Background Occipitoatlantoaxial malformation (OAAM) is reported rarely in dogs and few treatment options are described. The congenital condition is thought to be associated with a proatlas re-segmentation failure resulting in malformation and malalignment of the craniovertebral junction which can result in C1 to 5 myelopathic signs. Methods Customized three-dimensional printed locking plate with trajectory screw implantation points for the stabilization of the atlantoaxial joint in a dog with OAAM. The dog was evaluated at time points 0, 2, 6 and 9 months to determine clinical outcome, degree of fusion, implant positioning and subsidence. Results New bone formation was noted 9 months after surgery, but complete fusion remained absent, although no implant failure occurred. Clinically, the dog made a good recovery and was able to exercise normally 9 months after surgery. The only residual deficit was a subtle left-sided cervical torticollis. Clinical Significance This report illustrates a management option and outcome of a dog treated with OAAM. Collaboration between clinicians and engineers provides a new dimension of care for patients with vertebral malformations.

show abstract

Surgical Stabilization of an Occipitoatlantoaxial Malformation in an Adult Dog

Abstract: OAAM should be considered as a differential diagnosis in an adult dog with cervical myelopathy. Surgical fixation with cortical bone screws using a ventral approach can be successful.

Cited by 13 publications

References 7 publications

Cervical Vertebral Osteomyelitis With Secondary Septic Arthritis of the Atlantoaxial Joint in a Foal: A Case Report

Cervical Vertebral Osteomyelitis With Secondary Septic Arthritis of the Atlantoaxial Joint in a Foal: A Case Report

Traumatic spinal cord injury caused by suspected hyperflexion of the atlantoaxial joint in a 10-year-old cat

Occipitoatlantoaxial Malformation in a Dog Treated with a Custom-Made Implant

Contact Info

Product

Resources

About