Review of imaging modalities and radiological findings of calvarial lesions

Figure 21  Primary intraosseous meningioma in forty-nine years old female patient who underwent imaging for headache. A: Axial computed tomography on the bone window shows a smooth-contoured lesion (thin arrows) involving the posterosuperolateral wall of the left orbit, extending to the sphenoid and temporal bones, causing bone expansion and sclerosis, and extending beyond the bone; B: On axial T2-weighted image, the lesion is heterogeneously hypointense (thin arrows); C: On axial contrast enhanced T1-weighted image, the lesion shows cortical-dominated radial irregularities and mild contrast enhancement of bone with a soft tissue component in the vicinity (thin arrows); D: On coronal contrast enhanced T1-weighted image shows contrast enhancement of the dural surface (thick arrow) adjacent to the lesion.