Glossary
Aspiration: The withdrawal of fluid from the body, such as synovial fluid from the joint.
Autoimmune disease: A disease in which the immune system, naturally designed to protect the body from foreign invaders such as viruses and bacteria, instead turns against and causes damage to the body’s healthy tissues.
Avascular necrosis: A disease in which temporary or permanent loss of the blood supply to the bones causes the bone tissue to die and collapse. Avascular necrosis is a serious potential complication of corticosteroid therapy.
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