Avascular Necrosis Or Osteonecrosis


Associated Professor of Radiology, Shariati hospital, Tehran University of Medical Sciences, Tehran, Iran



Describes an ischemic death of the some areas of bones and is associated with different factors and can affect any bone.
Infarction begins when the circulation is interrupted to any part of bone and in any stages can be seen with variety of radiologic presentation.
MRI and nuclear medicine are the best modalities and MRI can be considered as the first modality for diagnosis.

We describe different staging radiologic pattern of AVN with focus on MRI presentation.