T1 coronals pre-gad














































T1 coronals pre-gad

Findings: Isointense soft tissue mass (a) infiltrating the medial aspect of the left skull base with multiple scattered foci of curvilinear and punctate decreased signal within. The lesion abuts the cerebellar hemisphere and extends inferiorly as far as the lateral mass of C1 (lm C1). Right basiocciput (basi). Right vertebral artery (vert). Obliquus capitis superior muscle (ocs). Obliquus capitis inferior muscle (oci).