Incidence of palmar process fractures of the distal phalanx and association with front hoof conformation in foals.
Authors: Faramarzi B, McMicking H, Halland S, Kaneps A, Dobson H
Journal: Equine veterinary journal
Summary
# Editorial Summary: Palmar Process Fractures and Hoof Conformation in Foals Palmar process fractures of the distal phalanx occur with surprisingly high frequency in young foals, yet their relationship to specific anatomical predispositions remains poorly understood. Faramarzi and colleagues conducted a longitudinal radiographic study of 19 foals (Thoroughbred, Quarter Horse and Arabian breeds) over approximately two-and-a-half year periods, using five different radiographic projections to detect fractures and correlate them with precise measurements of distal limb and hoof conformation. Fractures were identified in 74% of foals during the study, with medial and lateral palmar process fractures occurring at similar rates; critically, certain hoof conformational traits emerged as risk factors—specifically, increased dorsal length of the distal phalanx associated with medial fractures, whilst a smaller lateral angle and reduced lateral palmar length increased the likelihood of lateral fractures. These findings suggest that hoof geometry in the early months of development plays a material role in fracture susceptibility, with Thoroughbreds appearing particularly vulnerable. For practitioners managing young foals, this work highlights the value of early radiographic screening and the potential benefit of monitoring hoof balance and growth patterns as preventative strategies, particularly in at-risk breeds and individuals displaying the identified conformational characteristics.
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Practical Takeaways
- •Nearly three-quarters of young foals develop palmar process fractures, making this a common developmental concern requiring monitoring through repeated radiography
- •Hoof conformation assessment is valuable for identifying at-risk foals; excessive dorsal length, reduced lateral angles, and short lateral palmar lengths warrant close observation and potential farriery intervention
- •Breed predisposition exists with Thoroughbreds showing highest fracture prevalence, suggesting breed-specific management protocols may be warranted
Key Findings
- •Palmar process fractures were found in 74% (14/19) of foals during the study period
- •Longer dorsal length of the distal phalanx was associated with medial palmar process fractures
- •Smaller lateral angle and shorter lateral palmar length were associated with higher prevalence of lateral palmar process fractures
- •Thoroughbred foals showed particularly high prevalence of palmar process fractures compared to Quarter Horse and Arabian foals