J Korean Soc Radiol.  2012 Jun;66(6):493-499. 10.3348/jksr.2012.66.6.493.

Magnetic Resonance Angiography and CT Angiography of Persistent Primitive Olfactory Artery: Incidence and Association Rate with Aneurysm in Korea

• Kwon BR
• Yeo SH
• Chang HW
• Kim MJ
• Kim E
• Kim MK
• Cho HC
• Kim HS
• Lee SM

• KMID: 1439465
• DOI: http://doi.org/10.3348/jksr.2012.66.6.493

Abstract

PURPOSE
Japanese data indicates an incidence of persistent primitive olfactory artery (PPOA) of 0.14%. We studied the incidence of PPOA and associated cerebral vascular variation or anomalies in Korea.
MATERIALS AND METHODS
We retrospectively reviewed cranial magnetic resonance angiography (MRA) and computed tomography angiography (CTA) images of a total of 9841 patients of our institution. The diagnostic criterion of PPOA is extreme anterioinferior course of the proximal anterior cerebral artery, with a hairpin turn of the lateral projection.
RESULTS
We found 29 cases (0.29%) with PPOA. The PPOA location was on the left in 19 cases, bilateral in 3 cases, and on the right in 7 cases. An aneurysm was found at the hairpin turn in 2 patients. There were aneurysms in other sites in 3 cases. There were hypoplasia of anterior cerebral artery in 3 cases, and fenestration of intracranial artery in 1 case.
CONCLUSION
In Korean populations, the incidence of PPOA found in MRA and CTA was twice as high as that shown in the previous Japanese data. Within Korea, left side laterality is more common than right side or bilalterality. Aneurysmal dilatations at the hairpin turning point and aneurysms at other sites were found, and other vascular variations were observed in several cases.

MeSH Terms

Aneurysm
Angiography
Anterior Cerebral Artery
Arteries
Asian Continental Ancestry Group
Dilatation
Humans
Incidence
Korea
Magnetic Resonance Angiography
Magnetic Resonance Spectroscopy
Magnetics
Magnets
Retrospective Studies

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