Elbow dysplasia in dogs: symptoms, diagnosis and treatment options

What is elbow dysplasia?

Elbow dysplasia (ED) is a group of developmental abnormalities of the elbow joint that cause joint incongruence, cartilage damage and progressive osteoarthritis. It is the most common cause of forelimb lameness in large and giant breeds.

Conditions included

• Fragmented coronoid process (FCP): the inner tip of the ulna fragments. Most common form.
• Osteochondritis dissecans (OCD) of the elbow: detachment of articular cartilage from the humerus.
• Ununited anconeal process (UAP): the anconeal process fails to fuse to the ulna.
• Radio-ulnar incongruence: length mismatch creating uneven joint pressure.

Predisposed breeds

Labrador Retriever, Golden Retriever, Rottweiler, Bernese Mountain Dog, German Shepherd, Mastiff, Hovawart and other large breeds. Polygenic heredity — responsible breeders screen with the IEWG grading system.

Symptoms

• Intermittent or persistent forelimb lameness, worsening with exercise and improving with rest.
• Typical onset between 4 and 18 months of age.
• External rotation of the affected limb when bearing weight (the "paddling" gait).
• Pain on forced flexion-extension of the elbow.
• In advanced cases: joint thickening, crepitus and muscle wasting.

Diagnosis

• X-ray: shows osteophytes, fragments and joint changes. The flexed view (100°) is key.
• CT scan: gold standard — visualises FCP with far greater detail than radiography.
• Arthroscopy: confirms diagnosis and allows simultaneous treatment in the same procedure.

Treatment

• Surgery: treatment of choice in young dogs with joint fragments. Arthroscopy is the minimally invasive gold standard. Improves function but does not prevent the development of arthritis.
• Medical management: for established arthritis — veterinary NSAIDs, physiotherapy, weight control, joint supplements (glucosamine, omega-3).

Prevention and breeding

Elbow dysplasia has a genetic basis. Responsible breeders use the IEWG scoring system (0–3) and only breed animals scoring 0 or 1. Always request ED certificates for both parents when purchasing a puppy of a predisposed breed.