If you notice your young dog is limping on a front leg, it could be due to a condition called elbow dysplasia. While this skeletal condition can be treated, it's important to understand and be able to recognize it so you can get your furry friend back on his paws in no time.
What is Elbow Dysplasia?
One of the most common causes of lameness in a young dog's forelimb is a condition called elbow dysplasia. It is brought on by skeletal growth abnormalities in the dog's elbow. As the dog grows and matures, the condition worsens and leads to malformation and even degeneration of the joint. Unfortunately, the more the joint degenerates over time, the more painful the joint can be for the dog. Elbow dysplasia is often an inherited condition and is more commonly seen in large to giant breed dogs such as Bernese Mountain Dogs, German Shepherds, Golden retrievers, and Labrador retrievers.
Symptoms of Elbow Dysplasia in Dogs
A dog suffering from elbow dysplasia can have a marked decrease range of motion in the joint and can even display signs of pain or discomfort upon extension or flexion of the joint. They may hold the limp away from the body and may have intermittent or persistent lameness that is made worse by exercise but can also be observed as 'stiffness' when first getting up after resting. If they are geriatric, it is common to see sudden episodes of lameness in the limb. As the condition progresses, there may also be fluid buildup in the joint and a grating of bone-on-bone can be apparent as the cartilage continues to wear away.
Causes of Elbow Dysplasia
There are three bones that make up the elbow joint: the radius, ulna, and humerus and there are four separate skeletal conditions relating to the elbow that can result in the overall condition of elbow dysplasia. One or more can be present at the same time.
- Ununited Anconeal Process, where a growth plate does not close properly, leading to a detached piece of bone that can cause joint irritation and degeneration;
- Fragmented Coronoid Process, where a piece of bone breaks off inside the elbow joint, irritating the lining of the joint and causes the cartilage to wear away;
- Osteochondrosis Dissecans, where a piece of cartilage loosens from the surface of the joint, resulting in pain and inflammation;
- Elbow Incongruency, where the structure of the joint itself is imperfect, causing the cartilage to wear away more rapidly.
How to Diagnose Elbow Dysplasia
If you suspect your dog is suffering from elbow dysplasia, make an appointment with your veterinarian. Your vet will obtain a history along with a physical exam and in-depth orthopedic exam, which will include observations of your dog’s gait and radiographs (x-rays).
Radiographs will help better visualize the joint, checking for open growth plates, conformational abnormalities, and any bony fragments that may be causing irritation. If the radiographs are questionable, your vet may want to send them off to a veterinary radiologist for interpretation. A veterinary radiologist is someone who is board certified in reading radiographs (in addition to other images such as ultrasound, MRI, and CT scans) and will be better able to see more subtle changes in the joint space brought on by elbow dysplasia. Occasionally more advanced testing may be required for a definitive diagnosis. This may include getting an MRI and/or using a needle and syringe to aspirate a sample of fluid from the joint space. The joint fluid obtained can then be tested for inflammation or infection that could further complicate your dog's condition.
Treatment options depend on how severe your dog's condition is. If the elbow dysplasia is mild, conservative medical options may be offered.
If your dog's condition is more severe, there are some surgical options. The most surgical common is to use a fiberoptic scope (termed arthroscopy) to enter the joint space and clean out any loose flaps or pieces of cartilage and/or bone. On rarer cases, a board-certified surgeon may opt for an open-joint approach instead of the arthroscopic.
Management of symptoms can also be accomplished through non-steroidal anti-inflammatory drugs. Joint supplements such as glucosamine/chondroitin (Dasuquin, Cosequin, Vetri-Flex, Glycoflex) and essential fatty acid supplements may also help to lubricate the joint and decrease inflammation. Integrative therapies, such as cold-therapy laser can also help decrease pain and inflammation.
If your dog is diagnosed with elbow dysplasia, your vet may also refer you to a Certified Canine Rehabilitation Practitioner for more rehabilitative activities, such as swimming, an underwater treadmill, and range of motion exercises.
Finally, healthy exercise is of the utmost importance in dogs with elbow dysplasia. It may seem counter-intuitive to exercise a joint that is arthritic but balancing out the right amount and the right kind of exercise can prevent muscle atrophy as well as weight gain. Atrophied muscles and extra pounds can exacerbate arthritis. Check with your vet to see what type of exercise would be best for your dog.
Most dogs with elbow dysplasia respond well to the above therapies and go on to live healthy, happy lives. Your dog's individual prognosis will depend on his age, overall health, and the severity of the joint.
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Osteoarthritis (Degenerative Joint Disease). Merck Veterinary Manual.