[Is transient hip osteoporosis a transient osteonecrosis?].

A patient suffering from transient osteoporosis of the hip sustained a fracture of the ipsilateral collum femoris. Total hip replacement was performed. The complete specimen of the proximal femur was subjected to histological examination. The histological findings were consistent with the reparation stage of ischaemic bone necrosis of the femoral head. The authors discuss whether transient osteoporosis of the hip is a transient, i.e. self-recovering ischaemic necrosis of the femoral head.