The clinical, plain X-ray and magnetic resonance imaging (MRI) findings were studied in 13 haemophilic joints previously treated with radiosynoviorthesis. 32P had been injected into the joints at a median of 16 years earlier in an attempt to halt recurrent haemorrhage. Prior to 32P injection, the majority of joints demonstrated bone damage evident on plain X-ray, secondary to recurrent haemorrhage. At the follow-up evaluation we found plain X-rays were adequate to identify cysts, erosions and cartilage loss in these very damaged joints. MRI was superior to clinical examination and plain X-ray in identifying synovial hyperplasia and effusions.