Osteonecrosis: suspect with trauma, high-dose steroids, alcoholism, renal failure, transplantation, SLE, thrombotic states (e.g., sickle cell anemia, hemoglobinopathies), radiation injury, pancreatitis, gout, pregnancy, hyperlipidemia, & caisson disease (decompression sickness) https://t.co/y6iYd5fWZ2