Fig. 2

A 39-year-old male patient. a, b and c, preoperative lumbar CT showed extensive gout deposition in the lumbosacral region, destruction of adjacent vertebral bodies and attachments, protruding to the spinal canal. d and e, one year after operation, X rays showed that there was no gout deposition and no loosening of internal fixation. f and g, huge gout was showed during the operation. h, postoperative pathology showed spinal gout stone crystallization