AVN stands for Avascular Necrosis, also known as osteonecrosis. It is a medical condition where there is a loss of blood supply to a bone, leading to the death of bone tissue. This lack of blood flow can cause the bone to collapse and may result in joint surface damage.

Common Features of Avascular Necrosis (AVN):

Cause of AVN



• Trauma: joint injuries, fractures, or dislocations can damage blood vessels supplying the bone.
• Steroid Use:Prolonged or high-dose use of corticosteroids can be a risk factor.
• Alcohol and Smoking: Excessive alcohol consumption and smoking are associated with an increased risk.
• Such Medical Conditions:Conditions such as sickle cell anemia, lupus, and other autoimmune disorders may contribute.
• Joint Surgery or Treatments:Certain surgical procedures or treatments, like radiation therapy, can impact blood flow to the bone.




Affected Joints:



• AVN can occur in various joints, but it often affects the hip. Other commonly affected joints include the knee, shoulder, and ankle.




Symptoms:



• Pain is a common early symptom, typically increasing over time.
• Stiffness in the affected joint.
• Reduced range of motion.
• Eventually, collapse of the bone and joint deformity may occur.