Spinal cord glioblastoma.
This 11-year-old boy presented with lower extremity paraplegia and incontinence. A. A sagittal T2-weighted MR image shows poorly defined signal alteration and slight enlargement of the inferior aspect of the cord. Central hyperintensity in the mid-thoracic region is due to edema. B. There is hyperintensity throughout this portion of the lumbar cord on a T2-weighted axial image. C. Enhancement of this poorly defined infiltrative tumor (arrows) is predominantly peripheral on this sagittal fat-suppressed T1-weighted sequence with IV gadolinium.