Osteochondritis dissecans is a joint condition wherein a portion of the bone underneath the cartilage of a joint dies due to lack of blood flow. When this happens, the weakened bone is more susceptible to chipping or fracture. Either the bone or the cartilage -- or both -- can then break loose. The fragment ends up trapped, which can hinder joint motion, cause pain when moving in a certain way, or lead to more permanent joint degeneration. Osteochondritis dissecans is most common in children and adolescents whose bones have not fully developed.
If you have Osteochondritis dissecans (OCD), you might not realize it at first, especially if the bone fragment hasn't detached or is small. You may notice some difficulty with range of motion in your joints. Your knee might not fully extend, or you may have difficulty reaching out your arm or raising your shoulder. You may also notice crepitus, a grating, cracking, or popping sound when moving the joint. If one of your knees is affected, you may limp or favor that leg. Stability may also be an issue; you may feel limited in how much weight you can place on the leg.
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