1. Twelve patients with suspected pseudarthroses in previous spine grafts were subjected to operation.

2. Correction of the curves was produced by Harrington's instrumentation at the sites of pseudarthroses, osteotomies and fractures.

3. A significant increase in stature was produced in all the patients.

4. Harrington's hooks were safely inserted into cavities cut in intact portions of previous grafts.

5. Most patients were able to leave hospital in less than four weeks.

6. Deliberate bending of the Harrington rods has not led to subsequent fracture of the rod.

7. A sliding scoliosis fusion frame is described. It reduces friction during correction and it reduces haemorrhage during surgery.

1. The clinical and post-mortem findings are described of a patient who sustained a hyperextension injury of the neck with paraplegia.

2. There was no radiological evidence of fracture: osteoarthritis of the spine was present.

3. Evidence is presented that the cord was damaged from behind by the lamina of the vertebra below a tear in the anterior longitudinal ligament.