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Infrarenal Abdominal Penetrating Aortic Ulcer, an Atypical Location of a Rare Disease.

INTRODUCTION: Penetrating aortic ulcer (PAU) is classically included in acute aortic syndromes, together with aortic dissection and intramural hematoma. These three disorders are considered different stages of the same disease. PAU is the result of medial degeneration with disruption of the intima, mainly due to atherosclerotic risk factors. Most of them are located on descending thoracic aorta and only a few small series and case reports demonstrate location on infrarenal abdominal aorta. Clinical presentation varies in spectrum, from asymptomatic to fatal aortic rupture. Treatment options include medical therapy, particularly strict blood pressure control, and surgical approach. Nowadays endovascular exclusion is commonly performed, although open surgical reconstruction remains the gold standard.

METHODS: Report a case of endovascular repair of an infrarenal abdominal PAU.

RESULTS: A 72-year-old man, with hypertension, type 2 diabetes, hypercholesterolemia, lumbar osteoarthrosis, was referred to Vascular Surgery outpatient clinic with the diagnosis of infrarenal abdominal PAU on a Computed Tomography Angiography (CTA). This exam was performed due to chronic lumbar complaints from lumbar osteoarthrosis. The patient denied any other complaint. Physical examination was normal. A thoraco-abdomino-pelvic CTA revealed two sites of PAU in the infrarenal aorta with 10mm and 21mm of depth and associated aortic enlargement of 39mm maximum diameter. This exam revealed an enlargement of the depth of the PAU and the aorta diameter in 2 and 3mm, respectively, in the course of 2 months. An EVAR was performed, in a standard aorto-biiliac fashion. The post-operative period was uneventful and the patient discharged 3 days later. 1 month after the surgery, patient remained asymptomatic and the follow-up CTA demonstrated exclusion of both PAU, no endoleaks and stability of aortic diameter. A long term follow-up should be maintained, as for regular EVAR.

CONCLUSION: PAU is a rare clinical entity, with infrarenal abdominal aorta location even scarcer. Asymptomatic patient must be regularly followed and threshold to treatment low, bearing in mind the possible catastrophic evolution of the disease. Endovascular approach should be considered as a first approach, considering the technical feasibility and the comorbidities associated with this elderly population.

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