What is Avascular Necrosis?
Avascular necrosis is a disease resulting from the temporary or permanent loss of the blood supply to a bone. Without blood, the bone tissue dies and the bone collapses. If avascular necrosis involves the bones near a joint, the joint surface will probably collapse.
Avascular necrosis usually affects the ends of long bones such as the femur. It may affect just one bone, more than one bone at the same time, or more than one bone at different times.
Avascular necrosis is also called osteonecrosis, aseptic necrosis, and ischemic bone necrosis.
Symptoms of Avascular Necrosis
In the early stages of avascular necrosis, symptoms may not be present. However, as avascular necrosis advances, symptoms are present.
When symptoms are present, the most common symptoms are:
The period of time between the first symptoms and loss of joint function is different for each patient, ranging from several months to more than a year.
What Causes Avascular Necrosis?
Avascular necrosis has several causes. Some of the common causes are:
Risks of Developing Avascular Necrosis
Some diseases will increase your chance of developing avascular necrosis. If you have Gaucher's disease, pancreatitis, radiation treatments and chemotherapy, decompression disease, and blood disorders such as sickle cell disease, your chances of developing avascular necrosis increases.
Can Avascular Necrosis be Treated?
Yes. Treatment is necessary to keep joints from breaking down. If left untreated, most patients will experience severe pain and limitation in movement within 2 years.
Treatments will depend on the age of the patient, state of avascular necrosis, the location of the bone that is affected, and the cause.
Some common treatments are:
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