Fifty cases of iliopsoas transfer have been reviewed. The indications for operation, operative technique and post-operative care have been described. It seems that the iliopsoas muscle transferred laterally through the ilium acts as a better hip stabiliser than it does in its original position. The operation should not be undertaken by a casual operator and should be performed first in the post-mortem room.

1. Two cases of osteoid osteoma of the vertebrae are presented.

2. The unusual clinical histories and findings are reported in detail.

1. Arterial spasm may be expected in any injury resulting in stretch of the arterial system.

2. Excessive traction in the treatment of fractures may well initiate diffuse arterial spasm.

3. In fractures that have permitted shortening of the vascular system for a considerable period, spasm may be initiated when a return to normal length is made.