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Traumatic atlanto-occipital luxation in a dog: Associated hypoglossal nerve deficits and use of 3-dimensional computed tomography

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Objective

To present a detailed description of a dog with atlanto-occipital (A–O) luxation, including results of the neurologic examination, diagnostic imaging, and treatment by closed reduction. Study Design

Clinical case report. Sample Population

One adult intact male German shepherd dog. Results

Neurologic signs included nonambulatory tetraparesis and neck pain. An apparent hypoglossal nerve deficit was consistent with a lesion at the peripheral part of the nerve in the region of the craniocervical junction. Radiographic examination revealed a left-sided luxation of the A–O joint, and fractures were excluded with the aid of computed tomography (CT). Closed reduction of the luxated articulation resulted in a stable A–O joint, and complete neurologic recovery occurred within 4 weeks. Conclusions

Hypoglossal nerve deficits may be associated with A–O luxation. Clinical Relevance

Closed reduction of a unilateral, traumatic luxation of the A–O joint is a therapeutic option in dogs. CT imaging, especially 3-dimensional reconstruction, was considered helpful in excluding fractures as well as defining treatment options.

©Copyright 2003 by The American College of Veterinary Surgeons
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Document Type: Research Article

Affiliations: From the Department of Small Animals, Sections of Surgery/Neurology and Radiology/Radiooncology, Faculty of Veterinary Medicine of the University of Zurich, Zurich, Switzerland.

Publication date: 2003-09-01

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