Arthroscopic treatment of meniscal cysts in the horse.
Authors: Sparks H D, Nixon A J, Boening K J, Pool R R
Journal: Equine veterinary journal
Summary
# Meniscal Cysts as a Previously Undocumented Source of Equine Lameness Meniscal cysts represent an uncommon but clinically significant femorotibial joint pathology that had not been formally documented in the equine literature prior to this work by Sparks and colleagues, who reviewed surgical records from two practices to characterise the condition's presentation and treatment outcomes. Seven horses underwent arthroscopic cyst excision with concurrent meniscal debridement; five presented with lameness attributable to femorotibial joint disease, whilst two had cysts identified incidentally during diagnostic arthroscopy for unrelated osteochondral lesions of the lateral femoral condyle. At follow-up examination (available for six of seven cases), five horses returned to soundness and one showed improvement at 11 months post-operatively, with no evidence of cyst recurrence documented. The practical significance lies in recognising meniscal cysts as a differential diagnosis for persistent or progressive hind-limb lameness localised to the stifle, particularly when conventional imaging and diagnostic anaesthesia findings remain non-diagnostic; arthroscopic visualisation and debridement appear to offer a reliable resolution with favourable long-term prognosis. Given the rarity of this condition and the positive surgical outcomes reported, equine practitioners encountering obscure stifle lameness should maintain a low threshold for diagnostic arthroscopy when other diagnostic approaches prove inconclusive.
Read the full abstract on PubMed
Practical Takeaways
- •Include meniscal cysts in the differential diagnosis for horses with persistent femorotibial joint lameness, as they may respond well to surgical treatment
- •Meniscal cysts may be discovered incidentally during diagnostic arthroscopy for other conditions and should be addressed when found
- •Arthroscopic approach provides effective treatment with good long-term outcomes and minimal recurrence risk
Key Findings
- •Meniscal cysts are an uncommon but clinically significant cause of femorotibial joint lameness in horses, previously not described in the literature
- •Arthroscopic excision and meniscal debridement resolved or improved clinical signs in all 7 treated cases
- •Five of 6 horses with long-term follow-up were sound 11 months post-surgery with no evidence of recurrence