Fig. 12

Meningioma. Great polymorphism. Case 1 (a, b): Post-contrast T1WI (a) and CT (b): dural-based with dural tails (arrows) and bone lysis (dashed arrows). Case 2 (c–e): Post-contrast T1WI (c), CT (d), and DSC-PWI (e): dural-based hypervascular (arrowhead) with transdiploic growing (arrows), bone sclerosis-permeation, and aggressive-like periosteal reaction (dashed arrows). Case 3 (f, g): Post-contrast T1WI (f) and CT (g): diploic-centered plaque-like with intra- and extracranial laminar soft-tissue (arrowheads) and bone lysis-permeation (arrows). Case 4 (h): CT shows diploic-centered lesion with great spiculated hyperostosis (arrows). Case 5 (i, j) Post-contrast T1WI (i) and MR venography (j): diploic-centered with great homogeneous smooth hyperostosis (arrowhead) and intracranial soft-tissues characteristically invading the superior longitudinal venous sinus (arrows)