Urgent endovascular treatment of juxtarenal aneurysm using a parallel grafts technique.

Abdominal aortic aneurysms can constitute a therapeutic challenge in several anatomical scenarios, making endovascular treatment more complex. A juxtarenal abdominal aortic aneurysm (JR-AAA) is defined by the absence of a proximal landing zone in the infrarenal segment and, therefore, techniques must be used to obtain an adequate neck for fixing the endoprostheses without provoking occlusion of renal arteries and visceral branches. The parallel grafts technique, physician-modified stent-graft, industry customized endoprostheses, and off-the-shelf branched endoprosthesis are techniques used in abdominal aneurysms with inadequate proximal neck, but each technique has its indications, limitations, and risks.

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Aortoiliac aneurysms are particularly challenging to treat using a totally endovascular approach, because embolization of the internal iliac arteries can cause major complications. Several conventional and endovascular surgical techniques have been described that offer preservation of at least one internal iliac branch and options for completely endovascular treatment include branched stentgrafts and the parallel grafts technique. Here, the authors report the first case of endovascular treatment with preservation of an internal iliac branch using a Brazilian iliac branch device.