Medically Reviewed by Dr Wang Lushun What on earth is Avascular Necrosis (AVN)? Avascular necrosis, generally known as osteonecrosis, happens in the event the blood supply to bone cells is disrupted, resulting in the death of bone tissue. It frequently targets the hip joint, specially the femoral head–the higher “ball” https://www.theorthopaedicandpainpractice.com/what-is-avascular-necrosis-of-the-hip/?_gl=1*xbbxlb*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB