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Osteonecrosis
Alternative Names Aseptic necrosis,
avascular necrosis, Ischemic necrosis
Osteonecrosis occurs when your bones
lose their blood supply. The bones die and eventually
collapse, leading to pain and arthritis. You can have
osteonecrosis in one or several bones. It is most common
in the upper leg. Other common sites are your upper
arm and your knees, shoulders and ankles. The disease
can affect men and women of any age, but it usually
strikes in your thirties, forties or fifties.
Early in the disease you might not
have any symptoms. Later, you will probably have joint
pain that becomes more severe as the disease gets worse.
No one is sure what causes the disease. Risk factors include
- Long-term steroid treatment
- Alcohol abuse
- Joint injuries
- Having certain diseases, including arthritis and
cancer
Treatments include medicines, using crutches, limiting activities that put weight on the affected joints, electrical stimulation and surgery
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