Review of imaging modalities and radiological findings of calvarial lesions

Figure 17  Osteoma in twenty-five years old female patient who underwent imaging for swelling of the scalp. A: Plain anteroposterior head radiography shows a smooth contoured lesion (arrow) in a compact bony structure extending from the calvarial outer table; B: Axial computed tomography on the bone window shows an isodense smooth contoured lesion (arrows) with broad-based bony structures extending from the outer table to the scalp in the parietal bone; C and D: The left parietal bone shows a smooth contoured sclerotic lesion (arrows) with protrusion from the outer table to the scalp, with a prominent hypointense signal on T2-weighted images.