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Cervical Vertebral Stenotic Myelopathy (view source)

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'''Objective''' radiographic signs:

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* Intravertebral ~~ratios~~

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* Intravertebral ratio:

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* Intervertebral ~~ratios~~

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**Minimum saggital diameter of spinal canal divided by the maximum dorsoventral height of the same vertebral body.

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**<50% is significant

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* Intervertebral ratio:

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**"Caudal aspect of the dorsal lamina of the vertebral arch of the more cranial vertebra to the dorsocranial aspect of the body of the more caudal vertebra, OR from the caudal vertebral body of the more cranial vertebra to the cranial dorsal lamina of the vertebral arch of the more caudal vertebra, whichever is smaller"

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**<48% is significant

If the radiographs are of a high quality, a combination of these signs should be sufficient to make the diagnosis of CVM.

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Abscesses, tumours, synovial cysts, ligamental hypertrophy and trauma may not show signs radiographically despite producing the clinical signs of CVM.

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'''Myelography''' is generally only indicated in potential '''surgical''' cases.

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'''Myelography''' is gold-standard ante-mortem diagnostic procedure to document location of spinal cord compression.

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*Minimal complications encountered when performed with experienced personnel

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*It is generally only indicated in potential '''surgical''' cases but also essential to create a surgical plan.

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*>50% narrowing of dorsal dye column is considered significant

==Differential Diagnosis==

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May, SA & McIlwraith, CW (1998) '''Equine Orthopaedics and Rheumatology Self-Assessment Colour Review''' ''Manson Publishing Ltd''

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Robinson N.E. & Sprayberry K.A. (2008) "Current Therapy in Equine Medicine" "Saunders"

Arejones

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