High Quality Content by WIKIPEDIA articles! Avascular necrosis (also osteonecrosis, aseptic necrosis, ischemic bone necrosis, and AVN) is a disease resulting from the temporary or permanent loss of the blood supply to an area of bone. Without blood, the bone tissue dies and the bone collapses. If avascular necrosis involves the bones of a joint, it often leads to destruction of the joint articular surfaces (see Osteochondritis dissecans).
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