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