Pseudoaneurysm

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[edit] Discussion of Pseudoaneurysm

  • Pseudoaneurysms arise from a disruption in arterial wall with blood dissecting into the tissues around the damaged artery creating a perfused sac that communicates with the arterial lumen
  • Etiologies of pseudoaneurysms include: inflammation, trauma, and various iatrogenic causes (eg, surgery, percutaneous biopsy, drainage).
  • Pseudoaneurysms may present as a palpable thrill, audible bruit, or pulsatile mass.
  • Local effects of a pseudoaneurysm are secondary to mass effect on adjacent structures causing compromise of function.
    • Ischemia of the surrounding tissues due to vascular compromise may lead to necrosis of the overlying skin and subcutaneous tissue.
    • Neurologic symptoms may develop secondary to nerve compression or ischemia.
    • Compression of adjacent veins may lead to edema and deep vein thrombosis.
  • Thromboembolism and rupture are potential complications.

[edit] Imaging Findings for Pseudoaneurysm

[edit] US

  • Yin-yang sign: Swirling blood flow pattern within a cystic structure.
  • To-and-fro flow: to represents blood entering the pseudoaneurysm in systole and fro represents blood exiting the pseudoaneurysm during diastole.

[edit] Images

Patient #1: Gastroduodenal artery pseudoaneurysm

[edit] See Also

[edit] External Links

Goldminer: Pseudoaneurysm

[edit] References for Pseudoaneurysm

  • Nael E. A. Saad, Wael E. A. Saad, Mark G. Davies, David L. Waldman, Patrick J. Fultz, and Deborah J. Rubens. [Pseudoaneurysms and the Role of Minimally Invasive Techniques in Their Management.] RadioGraphics 2005 25: S173-189S.