Uretero-arterial fistulas (UAFs) are the consequence of a chronic inflammatory process that leads to the weakening of ureteral and arterial walls at the crossing level. In recent years, the number of cases described in the literature has continuously increased. Most UAFs are accounted for by the exposure to several typical risk factors. Clinical suspicion is the key for a rapid diagnosis and appropriate treatment. Management of UAFs has evolved over time, being currently based on an endovascular approach. Despite an improvement in diagnostic and therapeutic techniques, morbidity and mortality remain high.

This work, which is based on two clinical cases with different presentation and management, illustrates the heterogeneity of this pathology, which is often barely understood. In addition, the article proposes a review of the current recommendations on the subject.