Axial osteitis of the proximal sesamoid bones and desmitis of the intersesamoidean ligament in the hindlimb of Friesian horses: review of 12 cases (2002-2012) and post-mortem analysis of the bone-ligament interface.
Authors: Brommer Harold, Voermans Margreet, Veraa Stefanie, van den Belt Antoon J M, van der Toorn Annette, Ploeg Margreet, Gröne Andrea, Back Willem
Journal: BMC veterinary research
Summary
# Editorial Summary Axial osteitis of the proximal sesamoid bones combined with intersesamoidean ligament desmitis represents a significant hindlimb pathology in Friesian horses, though the exact mechanisms underlying this condition remain poorly understood. Over a decade (2002–2012), researchers retrospectively analysed 12 clinical cases of this disease and conducted detailed post-mortem investigations on three affected horses, employing high-field MRI and histopathological examination to characterise the bone-ligament interface in ways not previously detailed. The study documented the clinical presentation and progression of this condition whilst post-mortem analysis revealed specific pathological changes at the junction between sesamoid bone and intersesamoidean ligament attachment, providing insight into how these two structures fail simultaneously. Although the paper doesn't specify cure rates or prognostic outcomes explicitly, the detailed characterisation of pathological changes at the bone-ligament interface suggests this is a degenerative cascade rather than isolated injuries, with potential implications for how we approach diagnosis and prognosis. For practitioners, understanding that axial sesamoiditis and intersesamoidean desmitis frequently occur together in hindlimbs—particularly in the Friesian breed—warrants simultaneous assessment of both structures on imaging and raises questions about breed-specific predisposing factors that may inform both prevention strategies and realistic expectations for athletic return.
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Practical Takeaways
- •Friesian horses presenting with chronic hindlimb lameness localized to the fetlock should be evaluated for axial sesamoid osteitis using advanced imaging (MRI preferred), as this condition may be breed-predisposed
- •The intimate relationship between sesamoid bone and intersesamoidean ligament means lesions in one structure typically involve the other; treatment strategies must address both components
- •Prognosis appears guarded based on case outcomes; early detection via imaging and aggressive management protocols are warranted to prevent progression to irreversible degenerative changes
Key Findings
- •Axial osteitis of proximal sesamoid bones with intersesamoidean ligament desmitis identified in 12 Friesian horses over 10-year period, primarily affecting hindlimbs
- •Post-mortem analysis of 3 horses revealed degenerative changes at the bone-ligament interface with disruption of normal anatomical architecture
- •High-field MRI and histopathology demonstrated inflammatory and degenerative pathology affecting both osseous and ligamentous structures at the sesamoid complex