Narrative Review Disorders of the Cervical Vertebral Column Part 2:
Update on Current Surgical Techniques, Application and Case Selection
Abstract
Summary Pathologic conditions of the cervical vertebral
column cause combinations of pain, neurologic deficits and behavioural
issues that affect welfare and performance in the horse. A diagnosis of
cervical vertebral malformation (CVSM) is associated with a high
mortality rate, especially when identified in young animals. Surgical
treatment offers the potential for long term improvement or resolution
of clinical signs, at the cost of the potential for complications and an
initial increased financial outlay. There are difficulties with
extrapolating published outcomes to the individual case, however
representative reported outcomes following cervical vertebral interbody
fusion are an improvement in ataxia of 1 grade in 60-86% of horses, 2
grades in 7-74% of horses and 3 grades in 1-13% of horses, with a
fatal complication rate of 6-18%. Multiple factors such as lesion
location, cause of stenosis and duration of compression affect surgical
outcome. Case selection should take into account factors such as
severity of initial presentation, temperament, intended use and owner
attitudes. Uniportal endoscopic foraminotomy is in its infancy but shows
great promise as a minimally invasive procedure able to relieve clinical
signs associated with spinal nerve impingement in the cervical vertebral
column. This condition is being increasingly recognised, particularly in
Warmblood sport horses. Details of greater case numbers and longer term
follow up is required but around 87% of the first operated cases have
shown significant improvement in signs. Cervical articular process joint
arthroscopy/arthrotomy is uncommonly indicated but offers a low risk and
successful treatment option for horses diagnosed with clinically
relevant and surgically accessible intra-articular fragments or loose
bodies within these joints.