Avascular necrosis (AVN), also called osteonecrosis, aseptic necrosis, or ischemic bone necrosis, is a condition that occurs when there is loss of blood to the bone. Because bone is living tissue that requires blood, an interruption to the blood supply causes bone to die. If not stopped, this process eventually causes the bone to collapse.
Avascular necrosis most commonly occurs in the upper leg. Other common sites are the upper arm, knees, shoulder, and ankles.
Patience White, MD, chief public health officer, Arthritis Foundation.
Medicinenet.com: "How is rheumatoid arthritis treated?"
Medicinenet.com: "Osteoarthritis Treatments: Know Your Options."
WebMD Medical Reference: "Anti-Inflammatory Painkiller Drugs and Arthritis."
WebMD Medical Reference: "Steroids to Treat Arthritis."
WebMD Medical Reference: "Narcotic Pain Medication."
WebMD Medical Reference: "Biologics for Rheumatoid Arthritis Treatment."
WebMD Medical Reference: "Treating Rheumatoid Arthritis with Disease-Modifying Drugs (DMARDs)."
WebMD Medical Reference: "Pain Relief Medicine for Rheumatoid Arthritis."