Embolization of intracranial aneurysms with coils. The authors present the results and complications of microcoils embolization of intracranial aneurysms in 28 patients. Fibers platinum microcoils were used (Target Therapeutic) 28 patients (males: 6, females: 22; mean age: 51 years) were treated, 27 suffered from sub-arachnoid hemorrhage (SAH) and one presented with a pseudotumoral syndrome (giant aneurysm). All patients were evaluated on the day of treatment, according to the World Federation of Neuro-Surgeon classification (W.F.N.S.) of SAH and after 4 months of follow-up. At a mean follow-up period of 4 months, according to Glasgow Outcome Scale (G.O.S.) there were 13 cases of good results, 5 cases of "moderate disability", 2 cases of "severe disability", 2 cases of "vegetative state" and 6 deaths. Complications were observed in 11/28 cases. Coils migration and malposition in the parent artery were linked to the procedure (mechanical detachable coil) and resulted in severe deficit (one case), transient disability (one case) or went unnoticed (4 cases). Primary or secondary complete occlusion was achieved in 8/28 patients (32%). A majority of cases (11 cases) ended with stable residual aneurysmal sac lumen while rebleeding occurred in 3 patients and was responsible for 2 deaths. In the third case a favourable outcome was obtained after balloon occlusion of the parent artery.