Avascular Necrosis
Avascular necrosis (AVN) occurs when bone tissue dies due to lack of blood supply. Early diagnosis and treatment can help preserve the hip joint.
What is Avascular Necrosis?
Avascular necrosis (also called osteonecrosis) is a condition where bone tissue dies due to a lack of blood supply. Without adequate blood flow, the bone begins to weaken and eventually collapse.
The hip is one of the most commonly affected joints. AVN typically affects the femoral head (the ball of the hip joint) and can lead to severe arthritis if the bone collapses. Early detection is crucial, as treatment options are more effective before significant bone damage occurs.
Symptoms
AVN symptoms may develop gradually or suddenly, depending on the cause:
- Pain in the groin or thigh that may radiate to the buttock or knee
- Pain that worsens with weight-bearing activities
- Limited range of motion in the hip
- Limp or difficulty walking
- Pain that progresses from mild to severe over time
- Stiffness in the hip joint
Early Detection Matters
In early stages, AVN may cause no symptoms. By the time pain develops, bone damage may already be present. If you have risk factors, discuss screening with Dr. Hunter.
MRI can detect AVN before it shows on X-rays.
Risk Factors & Causes
Corticosteroid Use
Long-term or high-dose steroid medications
Excessive Alcohol
Heavy alcohol consumption over time
Trauma
Hip fractures or dislocations that damage blood vessels
Medical Conditions
Sickle cell disease, lupus, or other clotting disorders
Treatment Options
Treatment depends on the stage of AVN and amount of bone damage.
Medications
Pain relievers, blood thinners, and cholesterol-lowering drugs
Physical Therapy
Exercises to maintain range of motion and strengthen muscles
Core Decompression
Surgical drilling to reduce pressure and stimulate blood flow
Hip Replacement
For advanced cases with significant bone collapse
Related Conditions
Early treatment can save your hip
If you’re at risk for or experiencing symptoms of AVN, schedule a consultation with Dr. Hunter for evaluation and treatment options.