Avascular Necrosis (AVN) is the death of bone tissue as a result of the lack of blood supply to the bone and its surrounding tissue; in this case, specifically the hip area. This blood supply often leads to collapse of the bone, and if it occurs in a joint space - the collapse of the entire joint.
Causes of AVN:
Trauma to the hip
Steroid Use
Heavy Drinking
Sickle Cell Anemia
Gaucher's disease
Lupus
Decompression disease - bends
Cancer tx - chemo/radiation therapy.
Symptoms of AVN of the hip:
Pain in the groin, thigh, and knee. This pain usually worsens with standing or walking.
Testing for AVN
Hip Radiographs, early stages of AVN may not be a prominent on radiographs as compared to later stages of AVN being evident of radiographs.
MRI of the hip can show early bone degeneration's that may be a result of AVN.
Laboratory test such as bone biopsy may also be used as additional resources.
TX:
Medications - NSAIDS - for pain relief
Rest - restriction of physical activities
Physical Therapy to improve range of motion
Surgery such as decompression, bone reshaping, bone transplant, and joint replacement
www.mayoclinic.com
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