1. A case is described of three giant-cell tumours, the first in 1966 in the lower left femur, the second in 1968 in the upper right femur, the third later in 1968 in the upper left femur. 2. None of the tumours could be described as frankly malignant. 3. Despite a lapse of four years it is still not possible to decide whether the first tumour had metastasised or whether all three arose independently by multifocal origin.
1. A Nigerian patient with radiographic features of osteopathia striata, osteopoikilosis and melorheostosis is reported. Also radiographs of a patient from the Radiographic Museum of the Institute of Orthopaedics at the Royal National Orthopaedic Hospital are reproduced because they show a similar mixture of these conditions. 2. lt is probable that a common factor is present at some stage in the development of melorheostosis, osteopathia striata, osteopoikilosis and possibly osteopetrosis.
1. The factors producing electrolytic corrosion of stainless steels are reviewed, and it is shown how several factors operating together can accentuate corrosion in certain positions in the plated fracture. 2. These factors can be minimised by good metallurgy and good engineering on the part of the manufacturers. 3. When and if materials become metallurgically satisfactory, or a truly inert substitute for metal is discovered, it will be possible to assess the true contribution of infection, faulty operative technique and mechanical factors to the failures of internal fixation. Such a critical assessment of these probably more important factors is at present bedevilled by uncertainty as to the purely physical condition of the materials as supplied to the surgeon.
1. A case is described in which a malignant tumour developed in the soft tissues at the site of a bone-plating operation performed thirty years before. 2. The plate and screws were found to be composed of dissimilar metals and a difference of potential existed between them. 3. A careful consideration of the history and clinical course indicates that the tumour arose because of the presence of the metals.
1. A case of multiple pseudo-cystic tuberculosis in an American Indian infant is described. 2. The extensive lesions in the skull of this infant are considered to be of particular interest. 3. The possible significance of a bony lesion present at birth is discussed.
