“…If the tumor is located adjacent to bone, it may produce mild degrees of periostial reaction or cortical erosion [6,14,26,27] that could be radiographically detected [23,26]. It can also invade deeper endocranial structures, such as meninges [28,29] or intracerebral structures [30], when located on the scalp. In these cases, angiographic [31], CAT or NMR examination is necessary [22,28,30].…”