Figure 1a-e: Pre- and intraoperative findings: (a) T2-weighted native sagittal MR image: the tumour can be nicely delineated (red arrow). (b, c) Axial T1-weighted contrastenhanced sequence: inhomogeneous contrast enhancement is due to intratumoural calcifications (red arrow). (d) Sagittal contrast-enhanced T1-weighted image: again, the calcifications can be seen as contrast agent-free areas within the tumour (red arrow). (e) Intraoperative findings: the spinal cord is carefully mobilized under IOM. The tumour (blue arrow) can be seen at the left ventral dura.