Avascular necrosis is actually the death of the bone tissue due to a blood supply lacking. Also referred to as osteonecrosis, it may result in tiny breaks in the bone and the bone's eventual collapse. A broken bone or dislocated joint could be an interruption for the blood flow for a particular section of bone. AVN (Avascular Necrosis) can also be associated with long-term utilization of high-dose steroid medications and excess alcohol intake.
Anyone could be affected, but the condition is most prevalent in people between the ages of 30 and 50.

AVN or osteonecrosis or bone infarction, is the death of bone tissue attributed to interruption of the blood supply. At the onset, there may be no symptoms. But gradually joint pain may develop and may limit the ability to move. Complications include the collapse of the bone or joint surface.