Avascular Necrosis of the Knee: Causes, Symptoms, and Treatment
Avascular necrosis of the knee is a rare but serious condition that occurs when there is a loss of blood supply to the bone tissue in the knee joint. This lack of blood flow can cause the bone to die and ultimately collapse, leading to severe pain and limited mobility. While the exact cause is often unknown, certain factors such as trauma, long-term steroid use, and medical conditions like sickle cell disease or lupus can increase the risk of developing avascular necrosis. Symptoms may include knee pain, stiffness, and difficulty bearing weight on the affected leg. Early diagnosis is crucial to prevent further damage, as untreated avascular necrosis can result in joint destruction and the need for surgical intervention such as joint replacement. Treatment options may include medication to manage pain and inflammation, physical therapy to improve strength and range of motion, and in some cases, surgery to repair or replace the damaged joint.