Avascular necrosis is one of the debilitating disease in young people of 20 to 45 yrs of age in this fast growing world..it severly affects people's ability to do routine activities like walking running & cross seating. Avascular necrosis is not easily diagnosed in early stages as radiographs do not show early changes.thats why it became so important to diagnose and treat as early as possible.This book describes in detail about avascular necrosis...