Equine Antebrachial Compartment Syndrome Secondary to Flexor Muscle Myopathy With Subsequent Muscle Atrophy And Tendonitis: A Case Report.
Authors: Costa Felipe, Brunsting Julie, Corrêa Felipe
Journal: Journal of equine veterinary science
Summary
# Editorial Summary A 16-year-old jumping stallion presented with acute lameness (4/5 on AAEP scale) and significant swelling in the caudal antebrachial region following a fall, which imaging and clinical examination revealed to be flexor muscle myopathy complicated by compartment syndrome. The case was managed medically with improvement over several days; however, follow-up examination at six months demonstrated substantial flexor muscle atrophy despite return to soundness at walk and trot. Three months later, the horse developed superficial digital flexor tendonitis in the same limb, prompting the authors to explore the biomechanical cascade linking the initial compartment syndrome and myopathy to subsequent muscle wasting and secondary tendon pathology. This progression illustrates how acute muscle injury in the antebrachium can trigger chronic compensatory changes and predispose the flexor apparatus to degenerative conditions, emphasising the importance of long-term monitoring and targeted rehabilitation following compartment syndrome. For practitioners managing similar cases, the report underscores that clinical soundness at intermediate timepoints may mask ongoing muscle dysfunction, making detailed follow-up imaging and consideration of prophylactic management strategies essential to prevent secondary tendon injury and optimise long-term athletic prognosis.
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Practical Takeaways
- •Compartment syndrome can develop following traumatic injury to the antebrachium; early recognition and medical intervention may prevent progression to chronic complications.
- •Monitor horses with flexor muscle injury long-term, as muscle atrophy can alter limb biomechanics and predispose to secondary soft tissue injuries such as tendonitis.
- •Post-injury lameness improvement does not guarantee complete functional recovery; serial imaging at 6+ months may reveal progressive changes requiring modified management or rehabilitation protocols.
Key Findings
- •16-year-old jumping stallion developed antebrachial compartment syndrome and flexor muscle myopathy following a fall, presenting with 4/5 lameness and marked caudal antebrachial swelling.
- •Clinical improvement occurred over several days with medical treatment, but muscle atrophy was evident at 6 months post-injury despite return to soundness at walk and trot.
- •Secondary superficial digital flexor tendonitis developed 9 months post-injury, likely resulting from altered biomechanics caused by flexor muscle atrophy.