Which statement correctly identifies the most common component of elbow dysplasia?

Which statement correctly identifies the most common component of elbow dysplasia?

• A. Fragmented medial coronoid process
• B. Distal ulnar physeal irregularity
• C. Proximal radial head fracture
• D. Lateral coronoid process fracture

Answer: (A)

Fragmentation of the medial coronoid process is the most common component seen in elbow dysplasia. In dogs, the medial portion of the ulna bears a large share of the joint load against the humeral trochlea, and developmental or degenerative changes can cause this piece to crack and fragment. This creates irregular joint surfaces and loose fragments that drive cartilage damage and early osteoarthritis, producing the typical elbow pain and lameness. Other abnormalities like distal ulnar physeal irregularity, proximal radial head issues, or lateral coronoid fractures can occur but are much less common as the primary problem, which is why the fragmented medial coronoid process is the best answer.

Fragmentation of the medial coronoid process is the most common component seen in elbow dysplasia. In dogs, the medial portion of the ulna bears a large share of the joint load against the humeral trochlea, and developmental or degenerative changes can cause this piece to crack and fragment. This creates irregular joint surfaces and loose fragments that drive cartilage damage and early osteoarthritis, producing the typical elbow pain and lameness. Other abnormalities like distal ulnar physeal irregularity, proximal radial head issues, or lateral coronoid fractures can occur but are much less common as the primary problem, which is why the fragmented medial coronoid process is the best answer.