title: Osteochondritis dessicans and subchondral cystic lesions in draft horses: a retrospective study.
abstract: The clinical features, radiographic findings, treatment, and outcome in 51 draft horses with osteochondritis dessicans (OCD) or subchondral cystic lesions (SC) are reported. Clydesdale and Percheron were the most commonly affected breeds, and affected animals represented only 5% of the hospital population of draft horses. Horses were most frequently affected in the tibiotarsal joints and 73% (24 of 33 cases) of the horses with tibiotarsal effusion were affected bilaterally. Osteochondritis dessicans of the distal intermediate ridge was the most common lesion found in the tibiotarsal joint. The stifle was also frequently affected; 87% (13 of 15 cases) of horses with femoropatellar OCD only were lame, and lesions were most commonly located on the lateral trochlear ridge. Sixteen cases were managed conservatively, 30 received surgery, and 5 were euthanized. Lameness, effusion, or both clinical signs resolved in more than 50% of surgically treated cases, but clinical signs improved in 30% of conservatively-managed cases.
authors.affiliation: Department of Veterinary Anesthesiology, Radiology and Surgery, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon.
authors.forename: C B
authors.initials: CB
authors.lastname: Riley
authors.forename: W M
authors.initials: WM
authors.lastname: Scott
authors.forename: J P
authors.initials: JP
authors.lastname: Caron
authors.forename: P B
authors.initials: PB
authors.lastname: Fretz
authors.forename: J V
authors.initials: JV
authors.lastname: Bailey
authors.forename: S M
authors.initials: SM
authors.lastname: Barber
mesh_terms: D000818:Animals; D001845:Bone Cysts / Q000503:physiopathology / Q000628:therapy / Q000662:veterinary*; D005260:Female; D006734:Horse Diseases / Q000503:physiopathology / Q000628:therapy*; D006736:Horses; D008297:Male; D010008:Osteochondritis Dissecans / Q000503:physiopathology / Q000628:therapy / Q000662:veterinary*; D012189:Retrospective Studies; D013045:Species Specificity; D016896:Treatment Outcome