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Avascular Necrosis of the Hip (AVN): A Closer Look

Avascular necrosis (AVN), also called Osteonecrosis of the hip or aseptic necrosis, develops when the blood

supply to the femoral head is disrupted. Without adequate nourishment, the bone in the head of the femur dies and gradually collapses. As a result, the articular cartilage covering the hip also collapses, leading to disabling arthritis.