[Transitory algodystrophy of the hip].

Despite its relative rarity, transient osteoporosis of the hip deserves to be better known since it must be distinguished from more severe conditions, such as monarthritis or neoplastic bone disease, and its prognosis is always good. The typical symptoms are illustrated from two personally observed cases. This syndrome is characterized by hip pain, limping and osteoporosis of the femoral head with preservation of the joint space. The authors stress the benign development of the syndrome and warn against aggressive therapy.