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Aneurysm management involves either conservative medical therapy or surgical intervention, depending on the size and symptoms of the aneurysm. Conservative management is generally reserved for smaller, asymptomatic aneurysms, while larger or symptomatic aneurysms often necessitate surgical repair.Conservative Medical TherapyFor small, asymptomatic aneurysms, particularly abdominal aortic aneurysms (AAA) less than 5.5 centimeters in diameter, conservative medical therapy is recommended. This...
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An aortic aneurysm is a localized outpouching or dilation at a weak point in the artery wall. It may involve different parts of the aorta, such as the abdominal aorta, aortic arch, or thoracic aorta.Etiological factorsSeveral disorders are associated with aortic aneurysms.Congenital causes, such as primary connective tissue disorders like Marfan syndrome, impact the integrity and strength of connective tissues, notably affecting the aorta. Marfan syndrome is a genetic disorder that specifically...
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Related Experiment Video

Updated: Dec 24, 2025

Creation of Two Saccular Elastase-Digested Aneurysms with Different Hemodynamics in One Rabbit
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Left A2 Fusiform Aneurysm: 2-Dimensional Operative Video.

Benjamin K Hendricks1, Robert F Spetzler1

  • 1Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona.

Operative Neurosurgery (Hagerstown, Md.)
|April 14, 2020
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Summary

Surgical bypass is essential for wide-necked, fusiform anterior cerebral artery A2 segment aneurysms unsuitable for endovascular repair. This technique preserves critical blood flow to the brain.

Keywords:
A2AnastomosisFusiform aneurysm

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Area of Science:

  • Neurosurgery
  • Vascular Neurology
  • Cerebrovascular Surgery

Background:

  • Fusiform or giant anterior cerebral artery (ACA) aneurysms in the A2 segment, particularly those with wide necks, often preclude endovascular treatment.
  • These challenging lesions typically require surgical intervention to prevent rupture and preserve distal cerebral blood flow.

Purpose of the Study:

  • To describe the surgical management of a left-sided unruptured A2 fusiform aneurysm using a bypass procedure.
  • To illustrate a technique for preserving anterior cerebral artery flow during aneurysm treatment.

Main Methods:

  • The patient underwent a surgical bypass procedure for a left A2 fusiform aneurysm.
  • Surgical technique involved specific patient positioning, exposure of bilateral pericallosal branches, and side-to-side anastomosis.
  • A permanent clip was applied distally on the A2 segment to facilitate aneurysm thrombosis post-anastomosis.

Main Results:

  • Successful bypass and anastomosis were achieved, preserving flow along the anterior cerebral artery.
  • A permanent clip was placed on the distal A2, leading to aneurysm thrombosis.
  • The surgical intervention successfully managed the unruptured A2 fusiform aneurysm.

Conclusions:

  • Surgical bypass is a viable and necessary option for managing complex A2 segment anterior cerebral artery aneurysms not amenable to endovascular therapy.
  • This approach effectively preserves critical cerebral circulation while addressing the aneurysm.
  • The described technique offers a method for treating these challenging cerebrovascular lesions.