Fig. 5

Non-germ cell seminoma metastasis. a Sagittal unenhanced CT image showing an irregular and hyperdense extra-axial mass with a wide dural attachment and only minimal vasogenic oedema. b Sagittal CT image on the bone windowing showing bony destruction adjacent to the lesion (white arrowheads) and no hyperostosis. c Post-contrast sagittal T1-weighted MR image showing only minimal irregular peripheral enhancement and no dural tail. The sagittal sinus is involved and occluded. On unenhanced T1-weighted images, the lesion was isointense to white matter and contained small areas of T1-shortening consistent with haemorrhage. d Coronal T2-weighted image of the same lesion