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What is avascular necrosis? Avascular necrosis is a disease that results from the temporary or permanent loss of blood supply to the bone. When blood supply is cut off, the bone tissue dies and the bone collapses. If avascular necrosis happens near a joint, the joint surface may collapse. This condition may happen in any bone.
What is AVN? AVN â avascular necrosis â is a condition in which the ball â or femoral head â in a childâs hip joint loses its circulation. This can occur at any age, but it has different effects on infants, children, and adults. AVN from developmental hip dysplasia (DDH) is a result of treatment but it doesnât mean that your doctor did anything wrong.