Elbow Dysplasia in Dogs
Elbow dysplasia is the most common cause of forelimb lameness in young, large-breed dogs. It encompasses a group of developmental conditions that lead to cartilage damage, pain, and progressive osteoarthritis. Because the elbow joint is geometrically complex with overlapping bony structures, standard X-rays often miss the underlying pathology.
At Sage Veterinary Imaging, CT scanning provides unparalleled cross-sectional detail of the elbow joint, revealing fragmented processes, joint incongruity, and osteochondral lesions that are frequently invisible on radiographs. This precision directly translates to better surgical planning and outcomes.
SVI offers advanced ct services at our centers in Round Rock, Texas; Spring, Texas; and Sandy, Utah.
Elbow Dysplasia at a Glance
What Is Elbow Dysplasia?
Elbow dysplasia is an umbrella term for several developmental abnormalities of the elbow joint that result in abnormal stress distribution, cartilage damage, and secondary osteoarthritis. The four primary components are fragmented medial coronoid process (FMCP), ununited anconeal process (UAP), osteochondritis dissecans (OCD), and elbow incongruity.
Fragmented medial coronoid process (FMCP) is the most common form, accounting for approximately 70–80% of elbow dysplasia cases. The medial coronoid process — a small bony projection on the ulna inside the elbow — develops abnormally and fragments, causing pain, inflammation, and progressive cartilage damage. FMCP is notoriously difficult to diagnose on X-rays because the fragment is often small, non-displaced, and superimposed with other structures.
Osteochondritis dissecans (OCD) of the elbow involves a flap of damaged cartilage on the medial humeral condyle. Ununited anconeal process (UAP) occurs when the anconeal process fails to fuse to the ulna. Elbow incongruity refers to a mismatch between the radius and ulna length or curvature that alters joint mechanics. Multiple components frequently coexist.
Signs & Symptoms of Elbow Dysplasia
Signs typically appear between 5–18 months of age in affected breeds, though some dogs are not diagnosed until adulthood when secondary osteoarthritis becomes clinical.
⚠ Early Diagnosis Matters
Elbow dysplasia causes progressive and irreversible osteoarthritis. Dogs diagnosed and treated before significant cartilage loss — typically before 12–18 months of age — have substantially better long-term outcomes. If your young large-breed dog shows any forelimb lameness, early CT evaluation is strongly recommended.
How CT Diagnoses Elbow Dysplasia
CT has largely replaced X-rays as the primary imaging tool for elbow dysplasia evaluation because it eliminates the bony superimposition that obscures critical pathology on radiographs. Studies show CT detects 30–40% more lesions than X-rays alone.
What Our 128-Slice CT Reveals
Fragmented coronoid process — CT directly visualizes coronoid fragments, fissures, and sclerotic changes that are invisible or ambiguous on radiographs. Even non-displaced fragments are reliably detected.
Joint incongruity — Sub-millimeter CT measurements detect radio-ulnar length mismatches and humero-ulnar incongruity, which affect treatment planning and prognosis.
Osteochondral lesions — CT shows OCD flaps on the humeral condyle and associated subchondral bone changes with greater sensitivity than X-rays.
Ununited anconeal process — CT confirms UAP and shows the extent of displacement and secondary changes. Bilateral scanning is performed routinely to check both elbows.
Secondary osteoarthritis grading — CT provides objective measurement of osteophyte size, subchondral sclerosis, and joint effusion, helping stage disease severity for treatment decisions.
CT vs. Other Imaging for Elbow Dysplasia
CT
Superior for all components. Detects coronoid fragments, measures incongruity, and visualizes OCD lesions with sub-millimeter detail.
X-Ray
Shows UAP and advanced osteoarthritis. Frequently misses FMCP, subtle incongruity, and early disease. Often not sufficient alone.
MRI
Evaluates cartilage and soft tissues. Can complement CT for assessing cartilage integrity but takes significantly longer.
Which Breeds Are Most at Risk?
Breeds at Higher Risk
Labrador Retrievers have the highest prevalence of elbow dysplasia. Other commonly affected breeds include Golden Retrievers, German Shepherds, Rottweilers, Bernese Mountain Dogs, Newfoundlands, and Chow Chows. The condition is bilateral (affects both elbows) in more than 50% of cases, which is why CT evaluation of both elbows is routinely recommended.
What to Expect During an Elbow CT
Elbow CT scans are very fast — imaging takes approximately 5–10 minutes under general anesthesia. Both elbows are routinely scanned in the same session since bilateral disease is common. No contrast injection is typically needed for elbow evaluation.
Results are interpreted by a board-certified veterinary radiologist the same day. Multiplanar reconstructions and 3D renderings are generated to help the surgeon visualize fragment location and plan the arthroscopic or surgical approach. The report includes detailed measurements of incongruity and osteoarthritis severity.
Why Choose Sage for Elbow Dysplasia Diagnosis
Schedule an Elbow CT
If your dog has forelimb lameness, CT provides the definitive elbow evaluation needed to identify the cause and plan effective treatment.
Elbow Dysplasia Imaging FAQ
Get Answers for Your Dog
Forelimb lameness in large-breed dogs deserves a definitive diagnosis. CT imaging reveals elbow pathology that X-rays miss, enabling targeted treatment for the best possible outcome.