====== Anterior communicating artery aneurysm epidemiology ======

//[[J.Sales-Llopis]]//

//Neurosurgery Service,[[General University Hospital Alicante]], Spain.//
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{{rss>https://pubmed.ncbi.nlm.nih.gov/rss/search/1foLUIMrX-rKqTZdAEOWMyQ-tSfhPCyXcqbN65rzt5o6WICQbe/?limit=15&utm_campaign=pubmed-2&fc=20231017053324}}

[[Anterior communicating artery aneurysm]]s are the most frequent [[intracranial aneurysm]]s.

They account for 23–40% of [[ruptured intracranial aneurysm]]s and 12–15% of [[unruptured aneurysm]]s and are the most common intracranial ruptured or unruptured aneurysms.

The single most common site of [[aneurysm]]s presenting with [[SAH]]
((Locksley HB. Report on the Cooperative Study of Intracranial Aneurysms and Subarachnoid Hemorrhage: Section V. J Neurosurg. 1966; 25:219–239)).

They cause [[aneurysmal subarachnoid hemorrhage]], in about 21.0%~25.5% of [[spontaneous subarachnoid hemorrhage]]
((Suzuki M, Fujisawa H, Ishihara H, Yoneda H, Kato S, Ogawa A. Side selection of pterional approach for anterior communicating artery aneurysms--surgical anatomy and strategy. Acta Neurochir (Wien) 2008;150:31–39. 39.))
((Kimura T, Morita A, Shirouzu I, Sora S. Preoperative evaluation of unruptured cerebral aneurysms by fast imaging employing steady-state acquisition image. Neurosurgery. 2011;69:412–419. discussion 419-420.))
((Kwon SC, Park JB, Shin SH, Sim HB, Lyo IU, Kim Y. The Efficacy of Simultaneous Bilateral Internal Carotid Angiography during Coil Embolization for Anterior Communicating Artery Aneurysms. J Korean Neurosurg Soc. 2011;49:257–261)).

[[Saccular aneurysm]]s are most common in the [[anterior communicating artery]] (ACoA).

Frequently it is a [[wide necked aneurysm]] with an irregular shape, incorporate parent vessels, and are associated with significant variations in vascular anatomy.

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The most common site of rupture of [[very small intracranial aneurysm]]s was the [[anterior communicating artery]] (ACoA). Rupture of small and very small aneurysms is unpredictable, and treatment may be considered in selected high-risk patients according to factors such as young age, ACoA location, and hypertension
((Lee GJ, Eom KS, Lee C, Kim DW, Kang SD. Rupture of Very Small Intracranial
Aneurysms: Incidence and Clinical Characteristics. J Cerebrovasc Endovasc
Neurosurg. 2015 Sep;17(3):217-22. doi: 10.7461/jcen.2015.17.3.217. Epub 2015 Sep 
30. PubMed PMID: 26526401; PubMed Central PMCID: PMC4626345.
)). 
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[[A1 segment hypoplasia]] of the [[anterior cerebral artery]] is frequently observed in patients with [[anterior communicating artery aneurysm]]s. The effect of this anatomical variant on ACoA aneurysm morphology is not well understood
((Rinaldo L, McCutcheon BA, Murphy M, Bydon M, Rabinstein AA, Lanzino G.
360 Relationship of A1 Segment Hypoplasia to Anterior Communicating Artery
Aneurysm Morphology and Risk Factors for Rupture. Neurosurgery. 2016 Aug;63 Suppl
1:207. doi: 10.1227/01.neu.0000489849.55193.67. PubMed PMID: 27399558.
)).