Hi Doctors, My husband has been diagnosed with AVN. His MRI report says.. *vascular necrosis of superior portion of head of right femur involving 45-50% with mild subchondral collapse - Stage III (FICAT and ARLET classification) *Avascular necrosis of superior portion of head of left femur involving 55-60%. No evidence of subchondral collapse - Stage II (FICAT and ARLET classification). *Mild bilateral hip joint effusion. In this case, is core decompression suggested or any other procedure that can help cure this problem? Any suggestions?