Abstract
1. Six cases of development of heterotopic bone around joints in association with paralysis from intracranial lesions are presented. It is suggested that such bone may occur more commonly than is realised.
2. The features of these cases are very similar to those seen in association with paraplegia.
3. Extensive new bone is usually associated with fixed contractures.
4. Operation is hazardous in paraplegia but should not necessarily be so in other paralytic conditions.
5. In the presence of returning motor function excision of the bone, allowing correction of the deformity together with some movement, is a worthwhile procedure. In the hip, osteotomy alone usually requires plaster fixation with the attendant risks of venous thrombosis. Previous excision of the bone allows internal fixation of the osteotomy with early mobilisation.
