Abstract
Avascular necrosis of the femoral head (AVN) is a common cause of hip disability that, if left untreated, may cause collapse of femoral head and secondary hip osteoarthritis in up to 80% of patients. Osteonecrosis of the femoral head typically affects patients in their third-to-fifth decades of life and often, in 50% of these patients, the disease will develop on both sides.
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