Osteochondritis Dissecans (OCD)

Osteochondritis Dissecans (OCD) is a developmental orthopedic disease primarily seen in rapidly growing large and giant breed dogs. It occurs when cartilage in a joint fails to mature properly, becoming abnormally thick and brittle. This thick cartilage can then detach from the underlying bone, forming a painful flap that can irritate the joint surface or even break off entirely, becoming a 'joint mouse.' Common sites include the shoulder, elbow, stifle (knee), and hock (ankle). Symptoms often manifest during growth between 6-12 months of age. Diagnosis typically involves X-rays, sometimes supplemented with CT or arthroscopy. Treatment usually involves surgery to remove the cartilage flap and stimulate healing, aiming to reduce pain and prevent further osteoarthritis.