[Oncogenic hypophosphatemic osteomalacia].

In the courses of six years a severe hypophosphataemic osteomalacia, painful motor impairment and multiple rib fractures developed in a 51-year-old man. The symptoms gradually improved within one year under treatment with 3 micrograms daily of 1,25-dihydroxycholecalciferol, 3 g phosphorus and 3 g calcium, and biochemical parameters and the bone scintigram became normal. Ultimately, computed tomography, scintigraphy and digital subtraction angiography revealed a highly vascularized tumour in the condylar aspect of the right femur, and it was chiselled out.

[Indications for hip joint replacement. Early and late results].

Marked advances have been made in the application of hip joint endoprostheses since their extensive dissemination in the early 70's. Implantation material, surface structure, design of the prosthesis and surgical techniques have been better adapted to the biological and biomechanical conditions. Nevertheless, the long-term prognosis remains uncertain, and joint-saving interventions continue to take priority.

[Corrective osteotomy of the coxal end of the femur].

Malpositionings at the coxal end of the femur are mostly congenital or are produced post-traumatically by unsatisfactory osteosyntheses or secondary varus deformity if load was applied too early. Such malpositionings can occur after fracture of the neck of the femur or also after pertrochanteral fractures. Frequently, they present technical difficulties, since the anatomy of the coxal end of the femur is changed due to trauma and operation, and also because there is often a clearly noticeable inactivity atrophy as a result of prolonged duration of the disease.