Fig. 19
From: Bone up on spinal osseous lesions: a case review series
Osteosarcoma. Axial bone window CT image (a) demonstrates moth-eaten destruction of the right lateral mass of C1 (arrow), with a wide zone of transition along the posteromedial margin. Sagittal (b) and axial (c) T2-weighted images demonstrate the lesion to be low to intermediate in signal (arrow). The lesion is also low signal on T1-weighted images (d, e), and demonstrates avid enhancement (arrows) on post-contrast T1 sequences (f, g)