Fig. 1From: Paediatric ChordomasCT scanner of a clival chordoma. a. Axial brain window. The retroclival lesion developed posteriorly (dotted line) with contact to the brainstem (arrowhead). b. Axial bone window. Erosion of both posterior clinoid proccesses by the chordoma (arrows). c. Erosion of the posterior side f the clivus (arrow)Back to article page