Endoleak is the most frequent complication following endovascular aneurysm repair, which is not present in the surgical counterpart. The most frequent type of endoleak corresponds to type II, and its natural history remains poorly understood. Therefore, their treatment continues to be a topic of debate. The vast majority of the studies found in the literature are of a retrospective nature, and there are no prospective studies comparing intervention versus a conservative approach. Future studies should aim to compare not only different approaches to resolve type II endoleak but also when should be the right time to treat them, with the primary purpose of avoiding sac rupture. The objective of this review is to provide the reader with a literature overview about type II endoleaks to help in the decision-making process on this topic.
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