[Clino-static syndrome]

The clinostatic syndrome described in 1953 by Pierre Lehman is defined by weakness of the lower limb in the supine position contrasting with absence or only slight disorders on standing, normal neurological examination and passive mobility of the hip. The aetiology generally corresponds to a malignant lesion of the base or roof of the acetabulum and very rarely a fracture of the acetabulum or aseptic necrosis of the acetabulum, detected by bone scan or plain X-rays. An inverse clinostatic syndrome of the lower limb due to lysis of the ischium has also been described.