HealthMap

Aseptic Bone Necrosis and Long-Term Steroid Use

• Direct Link: Yes, long-term or high-dose corticosteroid use is one of the leading non-traumatic causes of aseptic bone necrosis (also known as avascular necrosis or osteonecrosis), particularly affecting the hip joint.
• Mechanism: Corticosteroids can cause:
• Impaired blood supply to the bone (ischemia).
• Increased fat cell size within the bone marrow, raising intraosseous pressure.
• Disturbed lipid metabolism and fat emboli formation that block small blood vessels supplying the femoral head.
• Vulnerability: The femoral head (hip) is especially vulnerable due to its limited collateral blood circulation.
• Clinical Implication: Patients undergoing prolonged steroid therapy should be monitored closely for early symptoms, such as deep, groin or hip pain and reduced range of motion, as early detection is critical to prevent joint collapse.