Parasagittal fractures of the proximal phalanx in Thoroughbred racehorses in the UK: Outcome of repaired fractures in 113 cases (2007-2011).
Authors: Smith M R W, Corletto F C, Wright I M
Journal: Equine veterinary journal
Summary
# Editorial Summary: Parasagittal Fractures of the Proximal Phalanx in Thoroughbred Racehorses Parasagittal fractures of the proximal phalanx remain a significant injury in Thoroughbred racehorses, yet outcome data for contemporary surgical repair had not been systematically reviewed since the 1980s. Smith, Corletto and Wright retrospectively analysed 113 cases of surgically repaired parasagittal fractures at Newmarket Equine Hospital between 2007 and 2011, stratifying fractures into short incomplete, long incomplete, complete and comminuted configurations, and tracking return to racing as the primary outcome measure. Approximately 48% of repaired cases subsequently raced, with significantly improved odds for younger horses (those fractured at 2 years old versus older animals had a 1.34 increased odds ratio) and for those with short incomplete fractures compared to complete fractures (OR 2.62); critically, no horses with comminuted fracture patterns returned to racing. These findings provide contemporary evidence for clinical decision-making when advising owners on prognosis and treatment options, whilst highlighting that fracture configuration—rather than age alone—is a key prognostic indicator for racing soundness, and that comminuted injuries warrant particularly guarded expectations from the outset.
Read the full abstract on PubMed
Practical Takeaways
- •Fracture configuration is a critical prognostic indicator: short incomplete fractures have substantially better racing outcomes than complete or comminuted fractures, which should guide owner counselling on treatment decisions
- •Age at injury matters: younger horses (2 years old) have better post-surgical racing prospects than older horses, though this may partly reflect natural attrition from training
- •Comminuted fractures carry a poor prognosis with zero return-to-racing outcomes in this series, making aggressive surgical repair less likely to be justified for racing purposes
Key Findings
- •48% of 113 Thoroughbreds with repaired proximal phalanx fractures returned to racing
- •Horses fractured at 2 years of age had significantly increased odds of racing post-surgery compared to older horses (OR 1.34, 95% CI 1.13-1.59)
- •Short incomplete parasagittal fractures had 2.62 times higher odds of returning to racing than complete parasagittal fractures
- •No horses with comminuted fractures returned to racing