My Husband has been diagnosed with AVN and has had both hips replaced. They have now said they see tracies in his knee s. He is 59 and not able to retire, we are at a loss. What to do next ?Why is this AVN happening to a healthy man? He had back surgerys over 10 years ago and was perscibed steriods, other than that we don t know what brought this on and how to treat it. Thanks for your time

Summarized question: What causes avascular necrosis in the knee after a knee replacement?