Pain associated with the sacroiliac joint region: a clinical study of 74 horses.
Authors: Dyson S, Murray R
Journal: Equine veterinary journal
Summary
# Editorial Summary: Sacroiliac Joint Region Pain in Horses Dyson and Murray's landmark study of 74 horses presenting with sacroiliac joint region pain provides the first rigorous characterisation of this condition using dual diagnostic criteria—abnormal radiopharmaceutical uptake on scintigraphy and/or positive response to periarticular local anaesthetic infiltration—enabling confident differentiation from other causes of poor performance. Dressage and showjumping disciplines carried significantly elevated risk, with affected horses typically taller, heavier and older than the general clinic population, whilst Warmbloods were substantially overrepresented (51% versus 29% in the normal population). Clinical presentations centred on restricted hindlimb impulsion—most marked when ridden—alongside common findings of poor thoracolumbar flexibility (35%), asymmetrical hindquarter musculature and epaxial underdevelopment; notably, 99% of horses demonstrated scintigraphic abnormalities, and periarticular anaesthetic infiltration produced profound improvement in all 34 horses treated. These findings establish a diagnostic framework that should significantly improve recognition of sacroiliac joint involvement in performance problems, particularly in larger warmblood competition horses, and validate local anaesthetic blockade as both a diagnostic tool and therapeutic intervention with reliable efficacy.
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Practical Takeaways
- •Dressage and jumping horses presenting with restricted hindlimb impulsion, stiffness, and poor canter quality should be evaluated for sacroiliac joint pain using scintigraphy combined with clinical examination
- •Young, tall Warmbloods in athletic disciplines warrant heightened suspicion for SI joint involvement; poor epaxial muscle development and hindquarter muscle asymmetry are important clinical markers
- •Diagnostic anesthetic infiltration around the SI joint can confirm diagnosis definitively—a positive response predicts good treatment potential and helps distinguish SI pain from concurrent lameness in other regions
Key Findings
- •Dressage and showjumping horses were significantly overrepresented in SI joint disease cases (P < 0.001)
- •Affected horses were older, taller, and heavier than normal clinic population; 51% were Warmbloods compared to 29% in general population
- •Poor epaxial muscle development and hindquarter asymmetry were common; 75% exhibited restricted hindlimb impulsion as predominant feature
- •99% of horses (73/74) showed abnormal scintigraphic findings in SI joint region; local anesthetic infiltration produced profound gait improvement in all 34 horses treated