The equine stifle is equivalent to a human knee and, like all limb joints, is prone to injury and disease. Colorado State University (CSU) researchers, for instance, recently examined 458 Western horses intended for cutting, during which routine survey radiographs (X rays) identified "abnormalities" in the stifles of almost half the horses. At the 12th Congress of The World Equine Veterinary Association, held Nov. 2-6, 2011 in Hyderabad, India, one CSU researcher discussed what treatment options veterinarians currently have and new treatment modalities in the works.

In the equine stifle, two long bones (the femur and tibia) come together to form a hingelike joint with multiple ligaments and two cartilagelike "discs." These "menisci" lie between the femur and tibia to help cushion the impact of the bones during weight bearing.

David Frisbie, DVM, PhD, Dipl. ACVS, from CSU's Gail Holmes Equine Orthopaedic Research Center, relayed that some of the most common stifle problems include cysts, osteochondritis dissecans (OCD), and injury to the ligaments and tendons stabilizing the joint.

Frisbie said one of the current recommendations for the surgical management of horses with medial femoral condyle cysts is injecting the anti-inflammatory corticosteroid triamcinolone acetonide directly into the lesion. This approach requires only one to two months of rest, whereas horses treated surgically by debridement (scraping the cyst out until healthy bone is reached) requires six to eight months' rest