STUDY DESIGN: Case report and literature review. OBJECTIVES: Gouty arthritis of the spine is rare. Gout presenting as back pain and quadriplegia may be difficult to distinguish from a spinal tumor. Symptoms vary, and the diagnosis is often delayed. We report an unusual case of thoracic spinal cord compression caused by extradural tophaceous deposits whose initial diagnosis had been lymphoid malignancy. To the best of our knowledge, this is only the second report of using single-photon emission computed tomography (SPECT) to diagnose spinal tophus. METHODS: We retrospectively reviewed the medical records, operative reports and radiographic imaging studies of a single patient. RESULTS: A 26-year-old man with severe tophaceous gout presented with a 4-month history of progressive weakness and dyschesia of both lower extremities. Coronal bone slices evaluated by SPECT indicated increased methylene diphosphonate uptake in the T9 and T10 pedicles. Pathology assessment revealed areas of amorphous substance containing urate crystals surrounded by inflammatory cells. The diagnosis was gouty tophus. CONCLUSION: The position of the spinal tophus may be related to the 'S' type of spinal anatomical structure. Obesity and inactivity may be the two risk factors for spinal tophus. Every effort should be made to lower the serum uric acid level by maximizing the pharmacological regimen. We believe that laminectomy can effectively relieve spinal cord compression. It also improves the longterm prognosis for spinal gouty tophus. SPECT may be a viable method for differentiating spinal gout and a malignant tumor.
Spinal Cord Series and Cases
INTRODUCTIONWe report a case of gouty arthritis affecting the thoracic spine in a 26-year-old man with thoracic spinal cord compression caused by extradural tophaceous deposits that had initially been diagnosed as lymphoid malignancy.