Document Detail

Double origin of the posterior inferior cerebellar artery: association with intracranial aneurysm on catheter angiography.
MedLine Citation:
PMID:  17885063     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Double origin of the posterior inferior cerebellar artery (PICA) is a congenital anomaly in which the PICA forms from two separate vessels arising from the vertebral artery. The prevalence of double origin of the PICA on catheter angiography is unknown because only four case reports have been published. Because some congenital intracranial vascular oddities are associated with an elevated incidence of aneurysm formation, we sought to determine the association between intracranial aneurysm and double origin of the PICA and to measure the prevalence of double origin of the PICA on catheter angiography. MATERIALS AND METHODS: A retrospective review was done over a 27-month period to identify patients with double origin of the PICA. Patients were excluded if both PICAs were not adequately visualized on catheter angiography. The cohort was then divided into two groups consisting of patients with and those without intracranial aneurysm. RESULTS: A total of 207 patients (101 males, 106 females) met the inclusion criteria. One or more cerebral aneurysms were found in 35.3% and double origin of the PICA in 1.45% of the patients. Double origin of the PICA was present in 4.1% of the patients with an aneurysm, and none of the patients without an aneurysm had double origin of the PICA (p = 0.043). A majority of the seven known cases of double origin of the PICA described by angiography in the peer-reviewed literature have associated intracranial aneurysm disease. CONCLUSION: Our data show that double origin of the PICA is seen in 4.1% of patients with intracranial aneurysm and on 1.45% of catheter angiograms. Double origin of the PICA has an increased association with intracranial aneurysmal disease and may represent a risk factor for subsequent development of intracranial aneurysm.
Walter S Lesley; M Hasan Rajab; Robert S Case
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  AJR. American journal of roentgenology     Volume:  189     ISSN:  1546-3141     ISO Abbreviation:  AJR Am J Roentgenol     Publication Date:  2007 Oct 
Date Detail:
Created Date:  2007-09-21     Completed Date:  2007-10-18     Revised Date:  2008-02-15    
Medline Journal Info:
Nlm Unique ID:  7708173     Medline TA:  AJR Am J Roentgenol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  893-7     Citation Subset:  AIM; IM    
Department of Radiology, Section of Surgical Neuroradiology, Texas A & M Health Science Center, College of Medicine, Scott and White Clinic, 2401 S 31st St., Temple, TX 76502, USA.
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MeSH Terms
Catheterization / statistics & numerical data*
Cerebellum / blood supply*,  radiography
Cerebral Angiography / statistics & numerical data*
Cerebral Arteries / abnormalities*,  radiography*
Intracranial Aneurysm / epidemiology*,  radiography*
Middle Aged
Texas / epidemiology
Vertebral Artery / abnormalities,  radiography

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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