From Jonathan Cluett, M.D.,
Your Guide to Orthopedics.
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About.com Health's Disease and Condition content is reviewed by Kate Grossman, MD

Definition: Osteochondritis Dissecans (OCD) is a disorder of ossification centers of the bone. Ossification centers are the focal points of new bone development. The most common location of OCD development is the knee joint.

Because of the location of this problem, patients most often complain of pain and swelling of the joint. X-rays are usually taken to evaluate the extent of OCD, and often a MRI will be helpful to create a management plan. Treatment often consists of an arthroscopy to look into the joint and find defects on the surface of the bone. Treatment may include removal of damaged cartilage and bone, and sometimes a cartilage transplant is used.

Also Known As: OCD