“…4,6,8 For instance, Hetts et al evaluated 77 patients with a mean age of 12 years where female and saccular aneurysms were more frequent. 8 Distally located aneurysms, pseudoaneurysm presence, traumatic origin, spontaneous thrombosis, 13,14 seizures and giant aneurysms are also characteristics in this population. 2,3 Despite fusiform aneurysms are frequently found in patients in the first decade of life, 4 in the great majority of these cases the etiology is unknown, ranging from 65 to 90%.…”