What is it?
Osteochondritis Dissecans (OCD) refers to damage of the bone underneath the cartilage in the knee. The damage may or may not also affect the cartilage. Cartilage is the tough, smooth covering on the ends of bones at a joint. OCD most commonly affects the end of the leg bone at the knee, but can also affect the knee cap (patella).
OCD usually starts as a mild aching pain that becomes worse over time. Sometimes the pain can occur after an injury.
When OCD occurs in a child who is still growing, it is likely to heal itself without surgery. However over time juvenile OCD may contribute to further joint damage and premature development of osteoarthritis.