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A 82-year-old woman with post discectomy osteomyelitis of L4-L5 (Patient no. 16). T1-weighted MRI image showed severely narrowed spinal canal due to large epidural abscess (a) while STIR MRI image showed L4-L5 disc infection (b). Comparison of immediate (c) and late postoperative X-rays (d) showed slight posterior migration of cage. Large fusion mass occurred anteriorly (d). CT image also confirmed anterior fusion mass extending to also L5-S1 disc space (e)
