It is well known that deposits of urates in soft tissues occur commonly in gout, particularly in para-articular areas and in articular cartilages of the limbs. Involvement of the spine and sacro-iliac joints by such deposits, however, has been regarded as being relatively unusual and has attracted little attention in the literature. As we were impressed by the frequency of episodes of acute back pain in our patients with gouty arthritis, established definitely on clinical and biochemical grounds, we undertook a radiological investigation of the spine and sacro-iliac joints in a series of 54 subjects. It was suspected that their episodes of pain were clinical manifestations of gout, and 12 of the group had suffered one or more attacks. Of these 12 subjects, eight were found to have radiological abnormalities. In six subjects, evidence of sacro-iliitis was demonstrated, which is comparable to the report of Resnick and Reinke [8], and in two patients vertebral lesions corresponded to those describe by Jaffe [5]. Hyperostotic spondylosis was present in no fewer than 29 of the series. Although lacking histological confirmation of the lesions demonstrated radiologically, we believe that our suspicions have been confirmed.