Understand the disease, causes and treatments.
Types of Arthritis
Learn about OA, the most common type of arthritis.
Learn about the rheumatic conditions that affect children.
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Browse the glossary by selecting a letter or by entering an arthritis-related term:
The withdrawal of fluid from the body, such as synovial fluid from the joint.
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.
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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