MONDO_0012126 (familial avascular necrosis of femoral head) can be described as follows. Avascular necrosis of femoral head (ANFH) is a severely disabling disease characterized by progressive groin pain, a limping gait, leg length discrepancy, collapse of the subchondral bone, limitation of hip function and eventual degeneration of the hip joint requiring total hip arthroplasty. Also known as: aseptic Necrosis of femoral head, aseptic Necrosis of head of femur, familial osteonecrosis of the femoral head.