“…Therefore, in giant-sized aneurysms, the presence or not of sac thrombus may be of paramount importance, as sufficient coil packing to prevent revascularisation would result in significant additional cost, time, and radiation exposure to the patient with equivocal overall benefit. 35,36,[42][43][44] In order to achieve a better post-coiling result, the use of the combination of liquid embolics, such as ethylene vinyl alcohol copolymer (Onyx), with coil has been reported with good results. 37 The use of covered stents, although virtually appealing for preserving the vessel patency as reported in the literature, is not feasible in most cases for dealing with GVAAs because of the absence of an optimal landing zone, significant tortuosity and evidence of an infected sac.…”