femoral head necrosis

Femoral head necrosis, also known as avascular necrosis, occurs when the blood supply to the top part of the thigh bone (femoral head) is disrupted. Without enough blood, the bone tissue starts to die, weakening the structure. Over time, this can cause the bone to collapse, leading to joint pain, stiffness, and difficulty moving. It often results from trauma, certain medical conditions, or prolonged use of steroids. Early diagnosis and treatment are important to prevent joint destruction and improve function, potentially avoiding the need for joint replacement.