Review of imaging modalities and radiological findings of calvarial lesions

Figure 19  Fibrous dysplasia in twenty years old male patient who underwent imaging for headache. A: Axial computed tomography on the bone window, the right parietal bone shows a smooth contoured fibrous dysplasia (arrows) close to the bone density, indented to the outer table, causing a slight extension of the diploe, mimicking an osteoma; B: On coronal FLAIR T2-weighted image, mild heterogeneous hypointense lesion in the parietal bone (arrows); C: On coronal T1-weighted image, mild heterogeneous hypointense lesion in the parietal bone (arrows); D: On coronal contrast enhanced T1-weighted image shows contrast enhancement well-circumscribed lesion (arrows) in the parietal bone.