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1080 Chapter 10

as enhanced osteoclastic resorption activity. Recently 13. McIlwraith CW, Foerner JJ, Davis DM. Osteochondritis dissecans
published results have shown a 90% success rate with of the tarsocrural joint: results of treatment with arthroscopic
surgery. Equine Vet J 1991;23;155–162.
VetBooks.ir SCLs. Some instances of SCLs (other than type 2) have 14. McIlwraith CW, Nixon AJ, Wright IM, et al. Diagnostic and
unilateral SCLs and 67% success rate with bilateral
Surgical Arthroscopy of the Horse, 4th ed. Elsevier, London, 2014.
been treated with debridement, but intralesional therapy
15. McIntosh SC, McIlwraith CW. Natural history of femoropatellar
with triamcinolone acetonide is attempted in the first osteochondrosis in three crops of Thoroughbreds. Equine Vet J
Suppl 1993;16:54–61.
instance and any debridement is limited to a loose flap 16. Nixon AJ. Diagnostic and surgical arthroscopy of the equine
associated with the SCL defect. shoulder joint. Vet Surg 1987;16:44–52.
Most recently a technique of lag screw fixation across 17. Nixon AJ, Fortier LA, Goodrich LR, et al. Arthroscopic reattach­
23
the cystic lesion has been described. Promising results ment of select (OCD) lesions using resorbable polydioxanone pins.
have been reported. The author has done a number of Equine Vet J 2004;36:376–383.
cases with this technique after encouraging results were 18. Poulos P. Radiologic manifestations of developmental problems. In
AQHA Developmental Orthopedic Disease Symposium. McIlwraith
reported in this paper and favorable results have been CW, ed. American Quarter Horse Association, Amarillo, TX,
experienced by other surgeons including the author. 1986;1–2.
19. Ray CS, Baxter GM, McIlwraith CW, et al. Development of sub­
chondral cystic lesions following articular cartilage and subchon­
dral bone damage in young horses. Equine Vet J 1996;
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