An Extra-Articular Surgical Approach to Subchondral Bone Cysts in the Humeral Head and Talus in Two Horses.
Authors: Ravanetti Paolo, Kühnle Christoph, Lechartier Antoine, Zucca Enrica
Journal: Journal of equine veterinary science
Summary
# Editorial Summary: Extra-Articular Surgical Treatment of Subchondral Bone Cysts Subchondral cystic lesions (SCLs) in the humeral head and talus present a significant diagnostic and therapeutic challenge, yet surgical management options remain poorly documented in the equine literature. Ravanetti and colleagues report on two cases—a three-year-old racing Thoroughbred with a humeral SCL and an eleven-year-old Arabian with a talar lesion—both presenting with severe lameness and radiographic confirmation of cystic disease; scintigraphy demonstrated focal increased radiopharmaceutical uptake in both horses, with CT imaging revealing secondary osteoarthritic changes in the Arabian's tarsocrural joint. Using an extra-articular surgical approach combined with a biocompatible, osteoinductive and osteoconductive implant, the authors achieved at least 70% radiographic reduction in cyst size for both cases, with both horses subsequently returning to their previous level of athletic work. This approach offers equine practitioners a potentially valuable alternative to intra-articular techniques, potentially reducing cartilage trauma whilst still addressing the underlying pathology. Given the poor prognosis traditionally associated with SCLs in these high-motion joints, this extra-articular technique may meaningfully extend athletic longevity and improve client outcomes, though further clinical validation across larger patient populations and varied presentations would strengthen evidence for broader adoption.
Read the full abstract on PubMed
Practical Takeaways
- •Extra-articular surgical approach with absorbable implants offers a viable treatment option for SCLs in the humeral head and talus when standard approaches may be limited
- •Consider this technique for racing and performance horses with radiographically visible SCLs causing severe lameness, as both cases returned to athletic function
- •Use of biocompatible, osteoinductive, and osteoconductive implants appears beneficial for promoting healing and reducing cyst size in these challenging locations
Key Findings
- •Extra-articular surgical approach with biocompatible implant reduced SCL radiographic appearance by at least 70% in both cases
- •Both horses returned to previous athletic activity following treatment
- •Scintigraphy demonstrated focal intense radiopharmaceutical uptake confirming SCL diagnosis in both cases
- •CT imaging revealed osteoarthrosis associated with SCL in the talus case