Medically Reviewed by Dr Wang Lushun What on earth is Avascular Necrosis (AVN)? Avascular necrosis, often called osteonecrosis, happens when the blood offer to bone cells is disrupted, leading to the death of bone tissue. It generally targets the hip joint, notably the femoral head–the upper “ball” portion of the https://www.theorthopaedicandpainpractice.com/what-is-avascular-necrosis-of-the-hip/?_gl=1*xbbxlb*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB