Aneurysm is the expansion of the lumen of the artery by more than 50% of its normal lumen. The appearance of an endoleak, i.e. a persistent flow of blood into the aneurysm sac, is one of the most common (post)operative complications that occurs after endovascular aneurysm repair with a stent-graft. The occurrence of endoleak is diagnosed by digital subtraction angiography after the procedure or multi-slice imaging techniques, most often by computed tomography (CT) a few days after the procedure and after 6 months. Aim: To examine the gender distribution of patients who underwent EVAR procedure, the incidence of endoleaks on the first control CT scan after the procedure, and to examine the frequency of type II endoleaks on the second CT scan control. Methods and materials: The data of 29 patients who underwent EVAR procedure at the Clinical Department of Radiology of the Clinical Hospital Center Rijeka, were collected and processed retrospectively, in the period from 1.1.2019. until 31.12.2022. Data on age, sex, presence and type of endoleaks were analyzed, the appearance of which is monitored on control CT a few days after the procedure and after 6 months. A chi-square test was also performed comparing the occurrence of type 2 endoleaks on the first and second control CT. Results: Out of 29 patients, 26 (89.7%) were men and 3 were women (10.3%). It was found that in more than half of the patients (61%) the endoleak was absent on the first CT scan control. It was also determined that the appearance of endoleaks in more than half of the patients (70.6%) was absent on the second follow-up CT after 6 months.