Abstract
A 51-year-old female with a 10-year history of progressive low back pain presented with a 9 × 15 mm circular tumor adjacent to L1 on preoperative magnetic resonance imaging. The lesion was successfully removed by T12-L2 laminectomy and nail-rod fixation. Histopathological examination diagnosedmature intramedullary cystic teratoma. At 6-month follow-up, right lower limb numbness and pain were reduced.