What is the most common location for a subchondral cystic lesion in a horse?

What is the most common location for a subchondral cystic lesion in a horse?

• A. Lateral femoral condyle
• B. Medial tibial plateau
• C. Medial femoral condyle
• D. Distal phalanx

Answer: (C)

Subchondral cystic lesions are focal cavities that form beneath the articular cartilage due to chronic cartilage damage and loading-related stress in a joint. In horses, the stifle joint is a common site for these lesions, and the medial femoral condyle is the most frequently affected area because it bears substantial weight and experiences repetitive shear and compressive forces during movement. This combination makes cartilage fissuring and subsequent bone cyst formation underneath more likely in that location, explaining why the medial femoral condyle is the best choice. The other sites can be involved in horses but are less typical primary locations for these cysts.

Subchondral cystic lesions are focal cavities that form beneath the articular cartilage due to chronic cartilage damage and loading-related stress in a joint. In horses, the stifle joint is a common site for these lesions, and the medial femoral condyle is the most frequently affected area because it bears substantial weight and experiences repetitive shear and compressive forces during movement. This combination makes cartilage fissuring and subsequent bone cyst formation underneath more likely in that location, explaining why the medial femoral condyle is the best choice. The other sites can be involved in horses but are less typical primary locations for these cysts.