1. Four joints of three young haemophiliacs who died in traffic accidents have been examined.

2. All patients had received prompt specific treatment for intra-articular and other haemorrhages.

3. Major macroscopic and histological changes were seen in the joints, but these changes were not quite so severe as those described before the days of specific treatment.

4. The possibilities of preventing articular changes and of minimising the effect of blood in the joints are discussed.