Osteonecrosis Patient Information (Subscribe)  

Certain joints of the body have only a few blood vessels that bring in blood. One of these joints is the hip. This document will describe what happens when this blood supply is damaged and results in what is called avascular necrosis (AVN) of the hip.
This guide will help you...

Avascular Necrosis (Aseptic Necrosis) of the hip represents a condition where the hip has at least temporarily lost the critical blood supply to the ball part (femoral head) of the hip. This can cause a condition where the bone begins to collapse at this weakened site and then arthritis can begin. Expert

Avascular necrosis (AVN), better known as osteonecrosis, of the femoral head, is "a disease that causes death of bone." Expert

Avascular necrosis is death of bone tissue due to a lack of blood supply. This can lead to tiny breaks in the bone and the bone's eventual collapse. Avascular necrosis most often affects the head of the thighbone (femur), causing hip pain. But it may affect other bones as well.
Blood...

Avascular necrosis most commonly occurs in people between the ages of 30 and 60. It most commonly affects the thigh bone (femur) at the hip (the head of the femur). Often, both hips are affected. In people older than 50, avascular necrosis is usually caused by a hip fracture but...

The National Osteonecrosis Foundation is made up of a group of patients, physicians and others who want to see the end of this disease.