Navicular disease in the horse: risk factors, radiographic changes, and response to therapy.
Authors: Ackerman, Johnson, Dorn
Journal: Journal of the American Veterinary Medical Association
Summary
# Editorial Summary Navicular disease affects horses across a range of ages and types, though middle-aged geldings and Quarter Horses appear particularly predisposed; this retrospective analysis of 74 horses with clinical and historical features consistent with the condition examined risk factors, radiographic findings, and long-term outcomes following various therapeutic approaches. Diagnostic radiographic changes were identified in 60% of the 70 horses radiographed, with symmetrical involvement of the front feet, yet crucially these radiographic findings bore no relationship to either the horse's response to treatment or its previous work category. Follow-up data from 51 owners revealed a sobering prognosis: only 9 of 38 horses (24%) that survived at least 6 months post-treatment achieved soundness, with no demonstrable advantage attributable to medical therapy, surgery, corrective farriery, or conservative management. Given the poor functional outcomes regardless of intervention type, practitioners should counsel clients that navicular disease carries a guarded prognosis and that return to pre-lameness work capacity is unlikely, emphasising the importance of early recognition and realistic expectation-setting in managing these cases. The absence of correlation between radiographic severity and clinical response warrants caution in over-interpreting imaging findings as predictors of treatability.
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Practical Takeaways
- •Navicular disease carries a poor prognosis regardless of treatment type—expect that most affected horses will not return to prelameness work capacity, so manage owner expectations accordingly
- •Radiographic evidence of navicular changes does not reliably predict treatment outcome or help select between medical, surgical, or corrective shoeing approaches
- •Consider breed, age, and sex as risk factors when evaluating lameness cases, particularly in Quarter Horses and geldings aged 4-9 years
Key Findings
- •Most affected horses were 4-9 years old, with males, geldings, and Quarter Horses at higher risk than their counterparts
- •Diagnostic radiographic changes were present in 60% (42/70) of examined horses with equal distribution between front feet
- •No correlation existed between radiographic findings and response to therapy or type of work performed
- •Only 24% (9/38) of horses were sound at follow-up (7-91 months post-treatment), with no advantage demonstrated for medical or surgical therapy over other approaches