Clinical and imaging findings in dogs with nerve root signature associated with cervical intervertebral disc herniation

Author:

Schachar Jordan1,Bocage Alan2,Nelson Nathan C.2ORCID,Early Peter J.1ORCID,Mariani Christopher L.1ORCID,Olby Natasha J.1ORCID,Muñana Karen R.1ORCID

Affiliation:

1. Department of Clinical Sciences College of Veterinary Medicine, NC State University Raleigh, North Carolina 27606 USA

2. Department of Molecular and Biomedical Sciences College of Veterinary Medicine, NC State University Raleigh, North Carolina 27606 USA

Abstract

AbstractBackgroundIntervertebral disc herniation (IVDH) is the most common spinal cord disease in dogs. Little information is available regarding the clinical presentation of nerve root signature (NRS) associated with cervical IVDH.Hypothesis/ObjectiveTo detail the clinical and magnetic resonance imaging (MRI) findings in dogs with NRS associated with cervical IVDH.AnimalsForty‐seven client‐owned dogs presenting with thoracic limb NRS and MRI confirmed IVDH.MethodsMedical records from 2010 to 2020 were retrospectively reviewed for dogs that met inclusion criteria. Imaging studies were evaluated by 2 individuals to characterize location and severity of neural tissue compression.ResultsChondrodystrophoid dogs comprised the majority of the study cohort, with dachshund the most common breed (n = 10). Three‐quarters of dogs were ≥7 years of age. Interobserver agreement was moderate or good for all of the imaging variables evaluated. The C6‐C7 intervertebral disc space was significantly overrepresented (P = .01), comprising 32% (15/47) of the affected discs. However, 42% (20/47) of cases involved C2‐C3 though C4‐C5 disc sites. Disc material was more frequently located laterally compared to medially within the vertebral canal (P = .0005), and to be associated with compression of the nerve root at the level of the intervertebral foramen (P = .012).Conclusion/Clinical ImportanceNRS is most commonly associated with lateralized or foraminal cervical disc herniations. It is most prevalent with C6‐C7 intervertebral disc involvement, suggesting that there might be unique anatomic factors that contribute to development of NRS at this site, but can be a clinical manifestation of IVDH occurring anywhere along the cervical spine.

Publisher

Wiley

Reference35 articles.

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3. Surgical treatment of cervical disc herniations in ambulatory dogs. Ventral decompression vs. fenestration, 111 cases (1980‐1988);Fry TR;Prog Vet Neurol,1991

4. Cervical pain secondary to intervertebral disc disease in dogs; radiographic findings and surgical implications;Morgan PW;Prog Vet Neurol,1993

5. Ventral decompression for the treatment of cervical disk disease in the dog: a review of 54 cases;Seim HB;J Am Anim Hosp Assoc,1982

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