A research group at CVS led by Sergio Gomes has published three studies looking at discospondylitis in dogs and cats.

Discospondylitis describes the infection of an intervertebral disc and its adjacent cartilaginous end plates and vertebral bodies.

It is commonly bacterial or fungal in origin.

The disease can be challenging to diagnose as signs are variable and sometimes vague.

For the research, neurology specialists retrospectively examined cases which presented at multiple referral sites that have furthered the understanding, clinical and imaging features of discospondylitis.

To date MRI has been the imaging modality of choice, with consistent CT imaging features of discospondylitis in dogs and cats not previously reported in detail.

However with the increased availability of CT in clinical practice, the research set out to examine CT features that could support a diagnosis of discospondylitis.

Discospondylitis in cats is uncommon, and very little research had been undertaken in this area. This research group therefore reported clinical presentation and imaging data about a population of cats, to support the future diagnosis of these cases.

During the three studies*, the researchers found that:

• Presentations of discospondylitis in cats is similar to that in dogs, although there was possible evidence of a higher prevalence of neurological dysfunction in cats.
  
  Spinal hyperaesthesia was present in all cats and pyrexia was identified in a minority of cases.
  
  Accompanying nonspecific clinical signs included lethargy, reluctance to move and jump, anorexia and weight loss.
  
  Bacterial culture was unrewarding in most cases, as in dogs, but antibiotic therapy for a mean duration of three months provided a favourable prognosis, with no long-term evidence of recurrence.
  
  
• MRI is currently the imaging modality of choice for discospondylitis however with the availability of CT in clinical practice this research was warranted.
  
  CT presents some advantages over MRI in the diagnosis of discospondylitis such as excellent depiction of bone, FNA guidance and enhanced utility in preoperative planning of spinal surgery in instances of subluxation or fractures.
  
  
• CT imaging features that can support the diagnosis of discospondylitis when performed in all three planes although equivocal cases on CT might still require MRI.
  Prior to this study, CT imaging features of discospondylitis in dogs and cats had not been reported. 

The studies

• Gomes, SA, Targett, M, Lowrie, M. Computed tomography features of discospondylitis in dogs. J Vet Intern Med. 2022; 36( 6): 2123- 2131. https://doi.org/10.1111/jvim.16551 
• Gomes SA, Garosi LS, Behr S, et al. Clinical features, treatment and outcome of discospondylitis in cats. Journal of Feline Medicine and Surgery. 2022;24(4):311-321. https://doi.org/10.1177/1098612X211020159 
• Gomes SA, Behr S, Garosi LS, et al. Imaging features of discospondylitis in cats. Journal of Feline Medicine and Surgery. 2020;22(7):631-640. https://doi.org/10.1177/1098612X19869705 

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