PT - JOURNAL ARTICLE AU - Ioannis V Papachristos AU - James Rankine AU - Peter V Giannoudis TI - Hip arthrodiastasis combined with core decompression and diamond concept for postcollapse femoral head avascular necrosis AID - 10.1136/bcr-2019-231081 DP - 2019 Aug 01 TA - BMJ Case Reports PG - e231081 VI - 12 IP - 8 4099 - http://casereports.bmj.com/content/12/8/e231081.short 4100 - http://casereports.bmj.com/content/12/8/e231081.full SO - BMJ Case Reports2019 Aug 01; 12 AB - In postcollapse hip avascular necrosis (AVN), the femoral head cannot be salvaged, necessitating total hip replacement. We report a case of a 39-year-old woman who developed idiopathic femoral head AVN with marked symptoms and radiological evidence of articular surface collapse. We treated her with core decompression combined with the ‘diamond concept’ (implantation of bone marrow concentrate, a growth factor and bone graft substitute) and distracted the hip joint with external fixator. Four years postoperatively the articular surface has been restored and the patient reports excellent quality of life. Hip arthrodiastasis with core decompression and ‘diamond concept’ regeneration could be considered a treatment option in advanced AVN of the femoral head.