A 42-year-old woman had a “life-long” history of low back pain, without radiation, anesthesia, weakness, or incontinence. An MRI scan without contrast of the lumbar spine revealed a sagittal division of the spinal cord into 2 halves at the L2-3 level separated by a cartilaginous septum, or diastematomyelia, a rare congenital neural-tube defect.
