Review of imaging modalities and radiological findings of calvarial lesions

Figure 8 External occipital protuberance (type III) in twenty-nine years old male patient who underwent imaging for headache. A and B: Computed tomography on the bone window show a bony protuberance (arrows) posterior to the occipital bone; C and D: Three-dimensional computed tomography show an occipital spur (arrows) posterior to the occipital bone.