Female, 13 years old. C-spine tenderness after closed head injury There is straightening of the normal cervical lordosis, likely positional. Otherwise, the cervical spine alignment is anatomic. The vertebral body height is preserved. The bone marrow and end plates demonstrate a normal MR appearance. The signal of the visualized cord is normal. The epidural space, thecal sac, and spinal cord are preserved with no evidence of spinal canal/neural foraminal narrowing or myelopathy. The intervertebral discs demonstrate normal T2 intensity and height with no evidence of disc herniation. The paraspinal soft tissues are unremarkable. There is no evidence of ligamentous injury.The cerebellar tonsils extend 5-6 mm below the level of the foramen magnum, maintaining a rounded morphology, most compatible with cerebellar tonsillar ectopia.
1.Normal MR appearance of the cervical spine, without evidence of acute osseous or ligamentous injury. No evidence of cord compression.2.Findings most compatible with cerebellar tonsillar ectopia as above.