Elbow dysplasia is a group of developmental conditions affecting the canine elbow joint, including fragmented coronoid process (FCP), osteochondrosis dissecans (OCD), united anconeal process (UAP), and elbow incongruity. Together they are the most common cause of forelimb lameness in large and giant breed dogs and cause significant welfare compromise if untreated.
Pathophysiology
Elbow dysplasia results from abnormal development of the elbow joint's complex anatomy — specifically failure of congruent alignment between the radius, ulna, and humerus. This creates areas of abnormal stress concentration causing cartilage and bone fragmentation. Genetic predisposition is strong — Labrador Retrievers, Golden Retrievers, Bernese Mountain Dogs, Rottweilers, and German Shepherds are disproportionately affected. Rapid growth and high energy diets may exacerbate genetic predisposition.
Clinical Signs
- Forelimb lameness in young dogs (6–18 months) — intermittent initially, progressive without treatment
- Elbow effusion (swelling of the joint)
- Pain on elbow extension and flexion
- Characteristic "paddling" gait with elbow held outward
- Muscle atrophy of the affected limb in chronic cases
Diagnosis
High-quality radiographs in multiple views demonstrate sclerosis, osteophytes, and sometimes fragmentation. CT scanning provides superior detail for FCP diagnosis and surgical planning — the gold standard for elbow dysplasia workup. Arthroscopy allows direct visualisation and treatment simultaneously.
Treatment Options
Arthroscopic surgery: Removal of fragmented coronoid process or cartilage flaps reduces ongoing joint inflammation and prevents further damage. Most cost-effective when performed early (before marked secondary OA development). Results are generally better in younger dogs with earlier intervention.
Conservative management: Rest, NSAIDs, weight management, and physiotherapy for mild cases or those not proceeding to surgery. Progression to OA is expected regardless of surgical intervention but is faster without surgery.
Newer interventions: Biceps tenotomy, proximal ulnar osteotomy, and sliding humeral osteotomy address incongruity and joint loading mechanics in selected cases.
Welfare and Breeding
Elbow dysplasia is a major welfare concern because it causes significant pain from a young age and leads to progressive OA. The British Veterinary Association/Kennel Club Elbow Scoring Scheme uses radiographic assessment to grade elbows (0–3 scale) — breeders should only breed from dogs with grade 0 (unaffected) or 1 elbows, and should not breed from dogs with clinical elbow disease regardless of score.