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Abdominal Aortic Aneurysm Caused by Aortic Fibromuscular Dysplasia: A Case Report

Ryo Kanamoto1, Shinichi Hiromatsu1, Shinichi Nata1

  • 1Department of Surgery, Kurume University School of Medicine, Kurume, Fukuoka, Japan.

Annals of Vascular Diseases
|November 8, 2018
PubMed

Insights

Fibromuscular dysplasia (FMD), a condition affecting medium arteries, rarely causes abdominal aortic aneurysms (AAA). This case highlights a rare instance of AAA stemming from aortic FMD, emphasizing its unusual presentation.

Area of Science:

  • Vascular Surgery
  • Pathology
  • Radiology

Background:

  • Fibromuscular dysplasia (FMD) typically affects medium-sized arteries like renal and carotid arteries.
  • Abdominal aortic aneurysms (AAA) are rarely associated with FMD.
  • The pathogenesis of FMD-induced AAA remains poorly understood.

Purpose of the Study:

  • To report a rare case of abdominal aortic aneurysm (AAA) caused by fibromuscular dysplasia (FMD).
  • To highlight the diagnostic and pathological findings in this unusual presentation.
  • To contribute to the understanding of FMD's potential impact on large arteries.

Main Methods:

  • A 69-year-old female patient with diagnosed AAA underwent contrast-enhanced computed tomography (CT).
  • Surgical intervention involved abdominal aortic replacement and aneurysm resection.
  • Pathological examination of the resected aneurysm wall tissue was performed.

Main Results:

  • Contrast-enhanced CT confirmed a saccular aneurysm in the terminal abdominal aorta.
  • Pathological findings of the resected aneurysm wall were consistent with fibromuscular dysplasia.
  • Surgical treatment for the abdominal aortic aneurysm was successfully completed.

Conclusions:

  • Abdominal aortic aneurysms can rarely be caused by aortic fibromuscular dysplasia.
  • This case underscores the importance of considering FMD in the differential diagnosis of AAA, even in large vessels.
  • Further research is needed to elucidate the mechanisms linking FMD to AAA development.
Keywords:
abdominal aortic aneurysmaortic fibromuscular dysplasiafibromuscular dysplasia

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