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Updated: May 9, 2026
11:58
Minimally Invasive Thumb-sized Pterional Craniotomy for Surgical Clip Ligation of Unruptured Anterior Circulation Aneurysms
Published on: August 11, 2015
Intracranial aneurysm arising from infundibular dilation.
Benedito Jamilson Araujo Pereira1, Vanessa Milanesi Holanda, Carlos Vanderlei Medeiros de Holanda
1Department of Medical Sciences, Division of Neurosurgery, University Nove de Julho (UNINOVE), Sao Paulo, SP, Brazil.
BMJ Case Reports
|August 2, 2013
Summary
Infundibular dilations (IDs) at the posterior communicating artery junction may precede aneurysm formation. This case report details a rare instance of multiple intracranial aneurysms, including one originating from an ID of the internal carotid artery.
Area of Science:
- Neurology
- Vascular Neurology
- Neurosurgery
Background:
- Infundibular dilations (IDs) are common anatomical variations at intracranial artery origins, typically at the internal carotid artery (ICA) and posterior communicating artery (PcomA) junction.
- The natural history of IDs, specifically their potential to progress into aneurysms, remains incompletely understood, with debate on whether they represent a pre-aneurysmal state or a normal variant.
Observation:
- A 55-year-old female presented with multiple intracranial aneurysms.
- A unique finding was a small aneurysm arising directly from an infundibular dilation at the posterior communicating segment of the ICA.
Findings:
- This represents the first reported case in the English literature of an intracranial aneurysm originating from an infundibular dilation in conjunction with multiple other aneurysms.
- The case highlights an unusual combination of vascular findings.
Implications:
- Accurate preoperative neurosurgical planning is crucial for managing such complex and rare presentations.
- Intraoperative findings play a vital role in determining the optimal management strategy for these unusual anatomical configurations.
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