Fig. 3

Atypical meningioma. a, b Pre- and post-contrast axial T1-weighted MR images showing a heterogeneously enhancing mass with a wide dural bass, dural tail and CSF cleft. The cortical interface is poorly outlined suggestive invasion of the underlying brain parenchyma as well as the adjacent skull. c Axial T2-weighted MR image of the same lesion with surrounding vasogenic oedema and midline shift. d A diffusion-weighted image shows heterogeneous areas of restricted diffusion extending into the adjacent cortex