Abstract
A rare case of exostosis in the lamina of lumbar spine is reported. The patient was a 39-year-old man who complained of lumbago, and presented with a mass in the lumbar spine,and bilateral masses in the lower limbs. Plain radiographs showed a bony prominence in the lamina of the fifth lumbar vertebra, and in bilateral tibias and femurs. CT images of the lumbar spine revealed that the bony prominence grew into the subcutaneous tissue, but did not invade the spinal canal. As malignancy of these tumors are known to occur, an operation was performed in February, 2003. Operative findings showed that the surface of the tumors were rough, and covered with a cartilage cap. We resected them from lamina and tibias. The histological diagnosis was benign multiple exostosis. The thickness of the cartilage cap was 0.86mm. After operation, lumbago disappeared rapidly. There have been no signs of local recurrence to date.
