Fig. 15.

Spinal astrocytoma. A 3 year old with a history of torticollis and ear pain. a Sagittal T2 image demonstrates a heterogeneous, expansile solid and cystic mass involving the upper cervical spine and brainstem, compressing the fourth ventricle and cerebellum (arrow). Mass/edema extends inferiorly to the C7-T1 vertebral level (arrowhead). b There is heterogeneous enhancement of the solid components on the T1 post-contrast image (arrow)